Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture, 2011
Pheromonal control of the codling moth, Cydia pomonella L. by an experimental “attract and kill” ... more Pheromonal control of the codling moth, Cydia pomonella L. by an experimental “attract and kill” formulation called “Mesaj CP” were carried out during 2008 at the Fruit Research Station Cluj, Romania. The experimental product formulated by the researchers of Raluca Ripan-Romania Chemical Research Institute contains the pheromone of the codling moth (E,E-8,10 dodecadien-1-ol) and an synthetic pyrethroid insecticide (cyfluthrin) in order to be compatible with the “attract and kill” strategy. The experimental product was applied in a rate of 4000 droplets per hectare by a hand operated pump dispenser. Field trials showed that this environmentally friendly strategy can compete with the conventional spray application of insecticides and can provide a good alternative for codling moth control in integrated pest management and fruit growing.
The species of pear sucker, also called pear psylla or pear psyllid, which are destructive insect... more The species of pear sucker, also called pear psylla or pear psyllid, which are destructive insects belonging to the genus Cacopsylla (Hemiptera: Psyllidae) cause substantial damage to pear tree plantations. Two consecutive years of research were conducted on the population structure and biological cycle of psylla in a small, elderly, and unmaintained pear orchard in northern Romania. Of the two identified species (C. pyri L. and C. pyricola Forster), C. pyri dominated the psylla population with a percentage of 77.8-80.1%. Adults of both species emerge from hibernation in the first part of March and produce three generations per year. First-generation adults emerge in the first decade of June, the second generation in the last decade of July, and the third generation in the first decade of September as they enter the hibernation phase. Larvae of the first generation appear in the second half of April, the second generation at the end of June - the beginning of July, and the third gen...
In order to estabilish strategies for pest control it is extremely important to know the structur... more In order to estabilish strategies for pest control it is extremely important to know the structure of the phytopathogens and their numerical density evolution. Agriculture is a dynamic system that continually changes to changing crop production practices. Integrated pest management (IPM) must continually change to meet pest management challenges. IPM is a continuum that will change with time. Every farmer practices some type of IPM, as long as they make progress to better in management. As new pest control techniques are discovered, the producer and crop advisor must adapt their pest control program to reflect these changes. Starting from the concept that IPM have to ensure a very low level of pesticides waste production, we have to take in consideration the relationship between usefull entomofauna and harmful species. For this reason it is necessary to establish a monitoring system of biodiversity for each culture. There are a lot of methods for monitoring pest population, but for ...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2010
During research period, 2007-2009, frequency of attack was slightly different from one hybrid to ... more During research period, 2007-2009, frequency of attack was slightly different from one hybrid to another, varying between 0.64 to 12.76%.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2011
The black locust leaf miners, recently permeated in the territory of Covasna County, are found in... more The black locust leaf miners, recently permeated in the territory of Covasna County, are found in all locations where the host plant is present. The attack value (frequency and intensity) differs from an area to another in the county, which is determined by climatic conditions characteristic of each area of the county (Dombi Pal Ors şi colab. 2010). This species have two generations in a year (Neţoiu and Tomescu, 2006). In the period the two species were monitored in the city of Târgu Secuiesc.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2012
Frankliniella occidentalis  (Pergande) (Thysanoptera: Thripidae) is an important pest in vegeta... more Frankliniella occidentalis  (Pergande) (Thysanoptera: Thripidae) is an important pest in vegetable and ornamental greenhouse crops due their direct damage by feeding and indirect damage by vectoring Tomato Spotted Wilt Virus (TSWV). Also, is very well known that they have an extremely high resistance to a wide range of insecticide. Thus by monitoring thrips population appropriate control plans can be established. Western flower thrips was reported in all greenhouses from Cluj County (Romania). In order to assess thrips population dynamic and color preference we conducted a research in a plastic greenhouse of 8000 m 2 placed outside of Cluj-Napoca where the main cultivated crops were tomatoes ( Solanum lycopersicum ) and the main thrips pest found was western flower thirps. During the sample period pest population was monitored weekly using two methods: by counting thrips trapped on five different colored sticky cards (blue, yellow, white, red and transparent) and by a technique ...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2012
Monarthropalpus buxi (  Diptera: Cecidomyiidae) has been described for the first time by Rubsaa... more Monarthropalpus buxi (  Diptera: Cecidomyiidae) has been described for the first time by Rubsaamen in 1982 (Perju et al., 2001). It is a monophagus species developing on Buxus sempenvirens as its dendrological species, which plays host to Monarthropalpus buxi, and is attacked by its larva. The attack is observed on the leaves of Buxus sempenvirens : the larva feeds on the cellular juice of the leaves, which have a goffering aspect, yellow-rusty in color. The objectives of the research regarded establishing the dynamics of flight curve, circadian rhythm, the effectiveness and efficacy of colored panels. The experiment developed along 24 days, starting with April 30, 2012 until May 24, 2012. Sticky panels have been used, in four different colors, placed above Buxus sempenvirens bushes, in one single row, at three different height levels. The first captures have been observed on May 3, 2012. The maximum of flight curve has been registered on May 11, 2012. The last captures have b...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2012
The aspects of external morphology in the Monarthopalpus buxi species (Rubsaamen) - (Diptera: Ce... more The aspects of external morphology in the Monarthopalpus buxi species (Rubsaamen) - (Diptera: Cecidomyiidae) are important in recognizing and distinguishing this species among other pests, and then in establishing strategies for prevention and fight against this pest. With the purpose of studying morphological aspects, the biological material, that is eggs, larvae, chrysalis, adults, has been collected from the Buxus serpenvirens bushes considered for the study. The biological material has been collected on the leaves (egg, larva, adult), whilst the chrysalis from the interior of the leaf, nearby the median nervure, with the help of utensils (brushes, bolds, spatula, scalpel, scissors). The adults have been captured with the help of colored panels and a brush with 70% alcohol, on leaves, and then introduced in sterile test-tubes with 70% alcohol, and ultimately brought in the laboratory for photos. The eggs and larvae have been collected directly on leaves; three small branches ha...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2012
The principal management strategy used to deal with western flower thrips in greenhouses involves... more The principal management strategy used to deal with western flower thrips in greenhouses involves the use of insecticides (R. A. Cloyd, 2009). We assessed the effectiveness of five chemical variants in five rows of tomato (36 m 2). The variants were: Pyrinex 25 NE (Clorpirifos 0.03%), Oscar 10 CE (Novaluron 0.06%), Vertimec 1.8 CE (Abamectin 0.08%), Karat-Ezeon (Lambda-chialotrin 0.02), Actara 25 WG (Thiametoxan 0.02%). Each variant was tested on a single row of tomato. Treatments were repeated four times. After each treatment, three examinations were performed: 24 hours before treatment, 24 hours after treatment and 7 days after treatment. Examinations consisted of counting direct on the plant the adults and pre-adults stages (larvae) separately. Twenty four hours after treatment the mean number of thrips per plant ranged from 39 individuals (Actara 25 WG) to 83.8 individuals (Oscar 10 CE). Seven days after treatment the mean number of thrips per plant varied between 23.5 individu...
In Europe, the box tree moth, Cydalima perspectalis (Walker, 1859) was first reported in 2006, in... more In Europe, the box tree moth, Cydalima perspectalis (Walker, 1859) was first reported in 2006, in southwestern Germany, then spread to almost all countries. Larvae of this species affect the aesthetic value of the box tree. In the last period, numerous studies were carried out regarding the identification of useful entomofauna that reduce the numerical density of the population of Cydalima perspectalis. In this study conducted in north-western Romania (Cluj County, in 2019), entomopathogens and useful entomofauna were monitored in four areas, represented by four cities. The entomopathogenic agents contaminated the larvae of the box tree moth in a proportion of 5.6% at Gherla, 6.8% at Dej, 8.7% at Cluj-Napoca and 15.3% at Ciucea. Most larvae have been infected with Bacillus. At Cluj-Napoca and Ciucea, the presence of the larval endoparasite Exorista larvarum L. (Diptera: Tachinidae) was reported. Parasitoid species determined a parasitization rate of 5.1% at Dej, 8.6% at Gherla and 1...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture, 2014
Melolontha melolontha L. polyphagous pest specie prejudicially both in the larval stage and in th... more Melolontha melolontha L. polyphagous pest specie prejudicially both in the larval stage and in the adultstage, it is found in Romania everywhere, especially near mixed forests of oak and beech. We monitoredthis specie in the lands of Gurghiu Forestry High School nursery and in outside lands, by detecting thepresence of grubs, pupae or adults using 10 control points inside and outside the nursery. In 2012, thevalue of the infestation analysis parameter is 1.94 larvae / m², which means that it is maintained a stronglevel of infestation. The level of infestation of the forestry nursery field with Melolontha melolonthalarvae is strong in both years of observations, the average number of larvae transformed into the thirdinstar larvae, on one m² in 2011 being 0.54 larvae/m² and in 2012 0.75 larvae/m².
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture, 2011
In the experimental period, the larvae attack symptoms were manifested by the appearance of "... more In the experimental period, the larvae attack symptoms were manifested by the appearance of "goose neck", in control plot, the attack frequency being about 15.46% in 2008, 25.33% in 2009 and 26.88% in 2010. Of the four products used in preventing and fighting Diabrotica virgifera virgifera larvae species, we obtained best results with products applied to the seed.
Bulletin of the University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 2011
The black locust trees from the Covasna resort spa’s parks are losing their aesthetic value becau... more The black locust trees from the Covasna resort spa’s parks are losing their aesthetic value because of their foliage is attacked by the larvae of two leaf miner species, Parectopa robinella Clemens and Phyllonorycter robiniella Clemens. The attack of this species begins in June-July and persists until the end of September. In the last three years the attack frequency produced by these species is increasing. So in 2008 the attack frequency was 9,2 % in 2010 has reached 18,8%. The same trend is reported also for the attack intensity, increasing annually the mines reported on a leaf. The number of mines/leaf for Phyllonorycter robiniella Clemens rise from 2,9 in the year 2008 to 3,7 mines/leaf in the year 2010; and for Parectopa robiniella Clemens it lowered from 2,3 mines/leaf in 2008 to 2,1 mines/leaf in the year 2010.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2017
In landscaping, one of the frequently used plants is Buxus sempervirens L. The aesthetic value of... more In landscaping, one of the frequently used plants is Buxus sempervirens L. The aesthetic value of these plants are often affected by the pests species that attack the leaves. The main species that attacks the Buxus spp. plants are: Monarthropalpus buxi Geoff., Psylla buxi L. and Cydalima perspectalis Walker. The attack of these species cause the drying of the plants.The Box Tree Moth, Cydalima perspectalis Walker., is a new species, on the European continent, being first recorded în 2006. In Romania, this species was reported in 2010, near Bucharest, from where it has been spread throughout the country. In Cluj has been reported in 2015. For establishing some control strategies, for this, it is necessary to know the bioecology of this species, depending on the specific environmental conditions of each area where the attack is present. In 2016 we have started the investigations to study the biological cycle, in Cluj area. The investigations were conducted in the laboratory and on th...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Dec 11, 2012
Western flower thrips, Frankliniella occidentalis (Pergande) is an important crop pest and a vect... more Western flower thrips, Frankliniella occidentalis (Pergande) is an important crop pest and a vector of tomato spotted wilt virus (TSWV) in many areas of the world. Its feeding can cause scarring and deformations on leaves and fruit, with seedlings and soft tissue particularly prone to feeding damage. Cucumbers and other vegetable are susceptible to fruit scarring. Population dynamics of western flower thrips was monitored both in field and protected spaces throughout different methods and on different ornamental and vegetables hosts. In this paper results regarding population dynamic on cucumber greenhouse crop are presented. Studies were conducted throughout five weeks. Shaken method was used. Ten leaves from the bottom of the plant, ten from the middle, ten from the tip of the plant and ten flowers were weekly sampled. Mean temperature and treatments applications were recorded. The fallen larvae and adults were counted. Females and males were separately noted. Sex ratio influence and spatial distribution was also followed. Data analysis demonstrated that thrips preferred to feed on younger leaves situated on tip of the plant. There was a very low difference between sex ratio in leaves as compared with the one in flowers. Regarding population dynamics of thrips on whole study period the trend was of increasing, thus treatment application were less efficient and proves its high pesticide resistance character.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2015
Epicometis hirta Poda. is a dangerous pest which can be observed on annual crops and also on frui... more Epicometis hirta Poda. is a dangerous pest which can be observed on annual crops and also on fruit tree species. The adult is a beetle can be easily recognized due to existing pubescence found all over it's body. The pest causes damage by consuming the reproductive organs of flowers. Adults are phytophagous and feed on leaves and flowers of plants such as orchard trees, cereals or ornamental plans. The timeing chemical control against this species is very difficult considering that the moment of sprays application is during bloom,thus the pollinating entomofauna is affected. Therefore the need to develop alternative control methods is highlighted. Semiochemical products represent a method of perspective whereas involve only the target species. For this purpose the team of entomology discipline along with Institute of Chemistry "Raluca Ripan"colegues, tested the attractiveness of two new synthetic products which were placed in three types of traps (Type 1, Type 2, Type 3). Experiments were located in UASVM Cluj Napoca Orchard, fruit tree farm Steluţa and fruit tree farm Agroindustriala Cluj Napoca. The best results were obtained by Type 1 trap, in all three locations.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2015
To control Monarthorpalpus buxi Geoff. species, the main pest of Buxus plants, in addition to che... more To control Monarthorpalpus buxi Geoff. species, the main pest of Buxus plants, in addition to chemical treatments an alternative method can be used for mass capture of adults with colored panels. In the area of Cluj-Napoca, in 2012-2013 was tested the effectiveness of this method. In this experiment was tested efficacy of white, blue, yellow and green panels. Of the 39603 adults captured during the two years, 36.4% were on green panels; 33.7% were on yellow panels; 24.1% were on white panels; 5.8% were on blue panels. Compared to the version where we did not apply any method of control, mass capture of Monarthropalpus buxi Geoff. adults with colored panels, attack frequency decreased at a rate of about 88% in 2012 (frequency of infested leaves was 8.61% compared to 70.78% in control variant) and 90% in 2013 (frequency of infested leaves was 7.67% compared to 77.36% in control variant).
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2015
Monarthropalpus buxi speciesis the major pest in Buxus plants. To establish strategies to control... more Monarthropalpus buxi speciesis the major pest in Buxus plants. To establish strategies to control this pest is compulsory to know the biological cycle, to act during the periods of maximum sensitivity of the species.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture, 2011
Pheromonal control of the codling moth, Cydia pomonella L. by an experimental “attract and kill” ... more Pheromonal control of the codling moth, Cydia pomonella L. by an experimental “attract and kill” formulation called “Mesaj CP” were carried out during 2008 at the Fruit Research Station Cluj, Romania. The experimental product formulated by the researchers of Raluca Ripan-Romania Chemical Research Institute contains the pheromone of the codling moth (E,E-8,10 dodecadien-1-ol) and an synthetic pyrethroid insecticide (cyfluthrin) in order to be compatible with the “attract and kill” strategy. The experimental product was applied in a rate of 4000 droplets per hectare by a hand operated pump dispenser. Field trials showed that this environmentally friendly strategy can compete with the conventional spray application of insecticides and can provide a good alternative for codling moth control in integrated pest management and fruit growing.
The species of pear sucker, also called pear psylla or pear psyllid, which are destructive insect... more The species of pear sucker, also called pear psylla or pear psyllid, which are destructive insects belonging to the genus Cacopsylla (Hemiptera: Psyllidae) cause substantial damage to pear tree plantations. Two consecutive years of research were conducted on the population structure and biological cycle of psylla in a small, elderly, and unmaintained pear orchard in northern Romania. Of the two identified species (C. pyri L. and C. pyricola Forster), C. pyri dominated the psylla population with a percentage of 77.8-80.1%. Adults of both species emerge from hibernation in the first part of March and produce three generations per year. First-generation adults emerge in the first decade of June, the second generation in the last decade of July, and the third generation in the first decade of September as they enter the hibernation phase. Larvae of the first generation appear in the second half of April, the second generation at the end of June - the beginning of July, and the third gen...
In order to estabilish strategies for pest control it is extremely important to know the structur... more In order to estabilish strategies for pest control it is extremely important to know the structure of the phytopathogens and their numerical density evolution. Agriculture is a dynamic system that continually changes to changing crop production practices. Integrated pest management (IPM) must continually change to meet pest management challenges. IPM is a continuum that will change with time. Every farmer practices some type of IPM, as long as they make progress to better in management. As new pest control techniques are discovered, the producer and crop advisor must adapt their pest control program to reflect these changes. Starting from the concept that IPM have to ensure a very low level of pesticides waste production, we have to take in consideration the relationship between usefull entomofauna and harmful species. For this reason it is necessary to establish a monitoring system of biodiversity for each culture. There are a lot of methods for monitoring pest population, but for ...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2010
During research period, 2007-2009, frequency of attack was slightly different from one hybrid to ... more During research period, 2007-2009, frequency of attack was slightly different from one hybrid to another, varying between 0.64 to 12.76%.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2011
The black locust leaf miners, recently permeated in the territory of Covasna County, are found in... more The black locust leaf miners, recently permeated in the territory of Covasna County, are found in all locations where the host plant is present. The attack value (frequency and intensity) differs from an area to another in the county, which is determined by climatic conditions characteristic of each area of the county (Dombi Pal Ors şi colab. 2010). This species have two generations in a year (Neţoiu and Tomescu, 2006). In the period the two species were monitored in the city of Târgu Secuiesc.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2012
Frankliniella occidentalis  (Pergande) (Thysanoptera: Thripidae) is an important pest in vegeta... more Frankliniella occidentalis  (Pergande) (Thysanoptera: Thripidae) is an important pest in vegetable and ornamental greenhouse crops due their direct damage by feeding and indirect damage by vectoring Tomato Spotted Wilt Virus (TSWV). Also, is very well known that they have an extremely high resistance to a wide range of insecticide. Thus by monitoring thrips population appropriate control plans can be established. Western flower thrips was reported in all greenhouses from Cluj County (Romania). In order to assess thrips population dynamic and color preference we conducted a research in a plastic greenhouse of 8000 m 2 placed outside of Cluj-Napoca where the main cultivated crops were tomatoes ( Solanum lycopersicum ) and the main thrips pest found was western flower thirps. During the sample period pest population was monitored weekly using two methods: by counting thrips trapped on five different colored sticky cards (blue, yellow, white, red and transparent) and by a technique ...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2012
Monarthropalpus buxi (  Diptera: Cecidomyiidae) has been described for the first time by Rubsaa... more Monarthropalpus buxi (  Diptera: Cecidomyiidae) has been described for the first time by Rubsaamen in 1982 (Perju et al., 2001). It is a monophagus species developing on Buxus sempenvirens as its dendrological species, which plays host to Monarthropalpus buxi, and is attacked by its larva. The attack is observed on the leaves of Buxus sempenvirens : the larva feeds on the cellular juice of the leaves, which have a goffering aspect, yellow-rusty in color. The objectives of the research regarded establishing the dynamics of flight curve, circadian rhythm, the effectiveness and efficacy of colored panels. The experiment developed along 24 days, starting with April 30, 2012 until May 24, 2012. Sticky panels have been used, in four different colors, placed above Buxus sempenvirens bushes, in one single row, at three different height levels. The first captures have been observed on May 3, 2012. The maximum of flight curve has been registered on May 11, 2012. The last captures have b...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2012
The aspects of external morphology in the Monarthopalpus buxi species (Rubsaamen) - (Diptera: Ce... more The aspects of external morphology in the Monarthopalpus buxi species (Rubsaamen) - (Diptera: Cecidomyiidae) are important in recognizing and distinguishing this species among other pests, and then in establishing strategies for prevention and fight against this pest. With the purpose of studying morphological aspects, the biological material, that is eggs, larvae, chrysalis, adults, has been collected from the Buxus serpenvirens bushes considered for the study. The biological material has been collected on the leaves (egg, larva, adult), whilst the chrysalis from the interior of the leaf, nearby the median nervure, with the help of utensils (brushes, bolds, spatula, scalpel, scissors). The adults have been captured with the help of colored panels and a brush with 70% alcohol, on leaves, and then introduced in sterile test-tubes with 70% alcohol, and ultimately brought in the laboratory for photos. The eggs and larvae have been collected directly on leaves; three small branches ha...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2012
The principal management strategy used to deal with western flower thrips in greenhouses involves... more The principal management strategy used to deal with western flower thrips in greenhouses involves the use of insecticides (R. A. Cloyd, 2009). We assessed the effectiveness of five chemical variants in five rows of tomato (36 m 2). The variants were: Pyrinex 25 NE (Clorpirifos 0.03%), Oscar 10 CE (Novaluron 0.06%), Vertimec 1.8 CE (Abamectin 0.08%), Karat-Ezeon (Lambda-chialotrin 0.02), Actara 25 WG (Thiametoxan 0.02%). Each variant was tested on a single row of tomato. Treatments were repeated four times. After each treatment, three examinations were performed: 24 hours before treatment, 24 hours after treatment and 7 days after treatment. Examinations consisted of counting direct on the plant the adults and pre-adults stages (larvae) separately. Twenty four hours after treatment the mean number of thrips per plant ranged from 39 individuals (Actara 25 WG) to 83.8 individuals (Oscar 10 CE). Seven days after treatment the mean number of thrips per plant varied between 23.5 individu...
In Europe, the box tree moth, Cydalima perspectalis (Walker, 1859) was first reported in 2006, in... more In Europe, the box tree moth, Cydalima perspectalis (Walker, 1859) was first reported in 2006, in southwestern Germany, then spread to almost all countries. Larvae of this species affect the aesthetic value of the box tree. In the last period, numerous studies were carried out regarding the identification of useful entomofauna that reduce the numerical density of the population of Cydalima perspectalis. In this study conducted in north-western Romania (Cluj County, in 2019), entomopathogens and useful entomofauna were monitored in four areas, represented by four cities. The entomopathogenic agents contaminated the larvae of the box tree moth in a proportion of 5.6% at Gherla, 6.8% at Dej, 8.7% at Cluj-Napoca and 15.3% at Ciucea. Most larvae have been infected with Bacillus. At Cluj-Napoca and Ciucea, the presence of the larval endoparasite Exorista larvarum L. (Diptera: Tachinidae) was reported. Parasitoid species determined a parasitization rate of 5.1% at Dej, 8.6% at Gherla and 1...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture, 2014
Melolontha melolontha L. polyphagous pest specie prejudicially both in the larval stage and in th... more Melolontha melolontha L. polyphagous pest specie prejudicially both in the larval stage and in the adultstage, it is found in Romania everywhere, especially near mixed forests of oak and beech. We monitoredthis specie in the lands of Gurghiu Forestry High School nursery and in outside lands, by detecting thepresence of grubs, pupae or adults using 10 control points inside and outside the nursery. In 2012, thevalue of the infestation analysis parameter is 1.94 larvae / m², which means that it is maintained a stronglevel of infestation. The level of infestation of the forestry nursery field with Melolontha melolonthalarvae is strong in both years of observations, the average number of larvae transformed into the thirdinstar larvae, on one m² in 2011 being 0.54 larvae/m² and in 2012 0.75 larvae/m².
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca: Horticulture, 2011
In the experimental period, the larvae attack symptoms were manifested by the appearance of "... more In the experimental period, the larvae attack symptoms were manifested by the appearance of "goose neck", in control plot, the attack frequency being about 15.46% in 2008, 25.33% in 2009 and 26.88% in 2010. Of the four products used in preventing and fighting Diabrotica virgifera virgifera larvae species, we obtained best results with products applied to the seed.
Bulletin of the University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 2011
The black locust trees from the Covasna resort spa’s parks are losing their aesthetic value becau... more The black locust trees from the Covasna resort spa’s parks are losing their aesthetic value because of their foliage is attacked by the larvae of two leaf miner species, Parectopa robinella Clemens and Phyllonorycter robiniella Clemens. The attack of this species begins in June-July and persists until the end of September. In the last three years the attack frequency produced by these species is increasing. So in 2008 the attack frequency was 9,2 % in 2010 has reached 18,8%. The same trend is reported also for the attack intensity, increasing annually the mines reported on a leaf. The number of mines/leaf for Phyllonorycter robiniella Clemens rise from 2,9 in the year 2008 to 3,7 mines/leaf in the year 2010; and for Parectopa robiniella Clemens it lowered from 2,3 mines/leaf in 2008 to 2,1 mines/leaf in the year 2010.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2017
In landscaping, one of the frequently used plants is Buxus sempervirens L. The aesthetic value of... more In landscaping, one of the frequently used plants is Buxus sempervirens L. The aesthetic value of these plants are often affected by the pests species that attack the leaves. The main species that attacks the Buxus spp. plants are: Monarthropalpus buxi Geoff., Psylla buxi L. and Cydalima perspectalis Walker. The attack of these species cause the drying of the plants.The Box Tree Moth, Cydalima perspectalis Walker., is a new species, on the European continent, being first recorded în 2006. In Romania, this species was reported in 2010, near Bucharest, from where it has been spread throughout the country. In Cluj has been reported in 2015. For establishing some control strategies, for this, it is necessary to know the bioecology of this species, depending on the specific environmental conditions of each area where the attack is present. In 2016 we have started the investigations to study the biological cycle, in Cluj area. The investigations were conducted in the laboratory and on th...
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Dec 11, 2012
Western flower thrips, Frankliniella occidentalis (Pergande) is an important crop pest and a vect... more Western flower thrips, Frankliniella occidentalis (Pergande) is an important crop pest and a vector of tomato spotted wilt virus (TSWV) in many areas of the world. Its feeding can cause scarring and deformations on leaves and fruit, with seedlings and soft tissue particularly prone to feeding damage. Cucumbers and other vegetable are susceptible to fruit scarring. Population dynamics of western flower thrips was monitored both in field and protected spaces throughout different methods and on different ornamental and vegetables hosts. In this paper results regarding population dynamic on cucumber greenhouse crop are presented. Studies were conducted throughout five weeks. Shaken method was used. Ten leaves from the bottom of the plant, ten from the middle, ten from the tip of the plant and ten flowers were weekly sampled. Mean temperature and treatments applications were recorded. The fallen larvae and adults were counted. Females and males were separately noted. Sex ratio influence and spatial distribution was also followed. Data analysis demonstrated that thrips preferred to feed on younger leaves situated on tip of the plant. There was a very low difference between sex ratio in leaves as compared with the one in flowers. Regarding population dynamics of thrips on whole study period the trend was of increasing, thus treatment application were less efficient and proves its high pesticide resistance character.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2015
Epicometis hirta Poda. is a dangerous pest which can be observed on annual crops and also on frui... more Epicometis hirta Poda. is a dangerous pest which can be observed on annual crops and also on fruit tree species. The adult is a beetle can be easily recognized due to existing pubescence found all over it's body. The pest causes damage by consuming the reproductive organs of flowers. Adults are phytophagous and feed on leaves and flowers of plants such as orchard trees, cereals or ornamental plans. The timeing chemical control against this species is very difficult considering that the moment of sprays application is during bloom,thus the pollinating entomofauna is affected. Therefore the need to develop alternative control methods is highlighted. Semiochemical products represent a method of perspective whereas involve only the target species. For this purpose the team of entomology discipline along with Institute of Chemistry "Raluca Ripan"colegues, tested the attractiveness of two new synthetic products which were placed in three types of traps (Type 1, Type 2, Type 3). Experiments were located in UASVM Cluj Napoca Orchard, fruit tree farm Steluţa and fruit tree farm Agroindustriala Cluj Napoca. The best results were obtained by Type 1 trap, in all three locations.
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2015
To control Monarthorpalpus buxi Geoff. species, the main pest of Buxus plants, in addition to che... more To control Monarthorpalpus buxi Geoff. species, the main pest of Buxus plants, in addition to chemical treatments an alternative method can be used for mass capture of adults with colored panels. In the area of Cluj-Napoca, in 2012-2013 was tested the effectiveness of this method. In this experiment was tested efficacy of white, blue, yellow and green panels. Of the 39603 adults captured during the two years, 36.4% were on green panels; 33.7% were on yellow panels; 24.1% were on white panels; 5.8% were on blue panels. Compared to the version where we did not apply any method of control, mass capture of Monarthropalpus buxi Geoff. adults with colored panels, attack frequency decreased at a rate of about 88% in 2012 (frequency of infested leaves was 8.61% compared to 70.78% in control variant) and 90% in 2013 (frequency of infested leaves was 7.67% compared to 77.36% in control variant).
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture, 2015
Monarthropalpus buxi speciesis the major pest in Buxus plants. To establish strategies to control... more Monarthropalpus buxi speciesis the major pest in Buxus plants. To establish strategies to control this pest is compulsory to know the biological cycle, to act during the periods of maximum sensitivity of the species.
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Papers by Ion Oltean