scholarly journals OVICIDAL EFFECT OF SOME INSECTICIDES ON BRUCHUS PISORUM L. (COLEOPTERA: CHRYSOMELIDAE) EGGS

2014 ◽  
Vol V (10) ◽  
pp. 65-70 ◽  
Author(s):  
Ivelina NIKOLO NIKOLOVA
Keyword(s):  
Ovicidal Effect ◽  
Bruchus Pisorum

scholarly journals Imaginal and ovicidal effect of some insecticides against Bruchus pisorum L. (Coleoptera: Chrisomelidae)

2015 ◽  
Vol 54 (1) ◽  
pp. 41-47 ◽  
Author(s):  
I. M. Nikolova
Keyword(s):  
Toxic Effect ◽  
Field Conditions ◽  
Forage Crops ◽  
Infected Seed ◽  
Highest Weight ◽  
Ovicidal Effect ◽  
Spray Timing ◽  
Bruchus Pisorum

Abstract Trials were conducted in 2011 and 2012 at the Institute of Forage Crops, Pleven, Bulgaria, in order to study the imaginal and possible ovicidal effect of some insecticides against Bruchus pisorum under field conditions. Treatments with insecticides were started after the appearance of the first pea weevils eggs on pods located on the bottom two nodes. It was found that treatment with acetamiprid; thiacloprid; thiacloprid+deltamethrin; 50 g cypermethrin+480 g chlorpyrifosethyl, 50 g cypermethrin+500 g chlorpyrifosethyl and zeta-cypermethrin resulted in the cessation of additional oviposition on the lower nodes by Bruchus pisorum, due to the toxic effect of the insecticides on the pea weevil. It was found that spraying with acetamiprid and zeta-cypermethrin was the most effective. These insecticides significantly reduced the proportion of infected pods in comparison with the proportion of pods with eggs before the treatment by 30.2 and 27.4% and by 15.8 and 24.0% in 2011 and 2012, respectively. The use of acetamiprid and zeta-cypermethrin was also associated with the lowest percentage of infected seeds (21.7 and 23.6%, respectively), with the lowest percentage of infected seed in infected pods (40.5 and 42.5%, respectively) and the highest weight of 1000 infected seeds (161.94 and 182.04 g, respectively). It was concluded that the management of pea weevils in the crop with acetamiprid and zetacypermethrin can lead to satisfactory results when spray timing is chosen when the first eggs are visible.

Effects of insecticides on adults and eggs of Drosophila suzukii (Diptera, Drosophilidae)

2017 ◽  
Vol 43 (2) ◽  
pp. 208 ◽  
Author(s):  
Daniele Cristine Hoffmann Schlesener ◽  
Jutiane Wollmann ◽  
Juliano De Bastos Pazini ◽  
Anderson Dionei Grützmacher ◽  
Flávio Roberto Mello Garcia
Keyword(s):  
North America ◽  
South America ◽  
Chemical Control ◽  
Stone Fruits ◽  
Drosophila Suzukii ◽  
Ovicidal Effect ◽  
Mere Presence ◽  
South Of Brazil ◽  
Different Cultures ◽  
First Time

Drosophila suzukii (Diptera, Drosophilidae) is an exotic species, endemic to Asia and currently a pest to small and stone fruits in several countries of North America and Europe. It was detected in 2013 for the first time in South America, in the south of Brazil. Unlike most drosophilids, this species deserves special attention, because the females are capable of oviposit inside healthy fruits, rendering their sale and export prohibited. Despite the confirmed existence of this species in different states of Brazil, this insect is yet been to be given the pest status. Nevertheless, the mere presence of this species is enough to cause concern to producers of small fruits and to justify further investigation for it’s control, especially chemical control for a possible change in status. Therefore, the goal of this work was to evaluate, in laboratory, mortality of D. suzukii adults and ovicidal effect when exposed to different insecticides registered for species of the Tephritidae and Agromyzidae families in different cultures. The insecticides deltamethrin, dimethoate, spinosad, fenitrothion, phosmet, malathion, methidathion, and zeta-cypermethrin resulted in mortality to 100 % of the subjects three days after the treatment (DAT). Regarding the effects over eggs, it was  established that the insecticides fenitrothion, malathion, and methidathion deemed 100 % of the eggs not viable, followed by phosmet and diflubenzuron, which also caused elevated reduction in the eclosion of larvae two DAT.

scholarly journals Insectos plaga de granos almacenados. Impacto en la seguridad alimentaria del municipio Las Tunas, Cuba

2016 ◽  
pp. 23
Author(s):  
Dayami Laguna Ávila ◽  
Carlos Pupo Feria ◽  
Gladia González Ramírez ◽  
Alina Espeek González
Keyword(s):  
Food Security ◽  
Food Safety ◽  
Tribolium Castaneum ◽  
Insect Pests ◽  
Sitophilus Oryzae ◽  
Main Species ◽  
Palabras Clave ◽  
Pest Insects ◽  
Stored Grains ◽  
Bruchus Pisorum

Insects pest of stored grains. Impact on food security of Las Tunas municipality, Cuba Resumen Con el objetivo de determinar las especies de insectos plaga en granos almacenados para la obtención de información que contribuyan al manejo de sus poblaciones y minimizar las pérdidas que influyen en la seguridad alimentaria de la población, se realizó un estudio en la Unidad 639 de la Empresa Mayorista de Productos Alimenticios del municipio Las Tunas, Cuba, en el período de enero del año 2011 hasta diciembre del año 2013. En el estudio se colectaron e identificaron 26 especies de insectos plaga en las naves, distribuidas en 19 géneros y 12 familias, pertenecientes a tres órdenes, de ellas, 23 especies cosmopolitas y de amplia distribución en Cuba. Las principales especies de insectos plaga encontradas fueron Tribolium castaneum; Ahasverus advena; Bruchus pisorum; Sitophilus oryzae; Ephestia sp. y Liposcelis sp. El hospedante con mayor frecuencia de aparición de las especies de insectos plaga fue el arroz, seguido por el frijol y el chícharo. Palabras clave: almacenes; cereal; plagas Abstract In order to determine the species of insect pests in stored grains to obtain information that contribute to the management of their populations and minimize losses that influence the food security of the population, a study was carried out in Unit 639 of the Company Wholesaler of Food Products of the municipality Las Tunas, Cuba, in the period from January 2011 until December 2013. The study collected and identified 26 species of insect pests in the ships, distributed in 19 genera and 12 families, belonging to three orders, of which 23 species are cosmopolitan and widely distributed in Cuba. The main species of pest insects found were Tribolium castaneum; Ahasverus advena; Bruchus pisorum; Sitophilus oryzae; Ephestia sp. and Liposcelis sp. The host with the highest frequency of appearance of insect pests was rice, followed by beans and peas. Keywords:  Insect pests; storage; food safety.

scholarly journals Ovicidal action of insectoacaricide drugs sentry home, Neostomazan 1:200 manufacured by CEVA, Neostomazan 1:200 manufacured by product and Extrazol M on fleas Ctenocephalides spp. eggs

2021 ◽  
pp. 111-118
Author(s):  
Olga Yasynovska
Keyword(s):  
Veterinary Medicine ◽  
Light Microscope ◽  
Petri Dish ◽  
Test Material ◽  
Innovative Technologies ◽  
Ovicidal Effect ◽  
Livestock Products

The aim of the research. To compare the ovicidal efficiency of insectoacaricides of different composition and manufacturers on flea eggs (Ctenocephalides spp.) for treatemnt of the premises where animals live. Materials and methods of the research. The study was conducted on the basis of the clinic of veterinary medicine "Vetservice" Sumy, laboratory "Veterinary Pharmacy" and "Innovative technologies and safety and quality of livestock products" of Sumy National Agrarian University. The ovicidal effect of insectoacaricides on flea eggs of Ctenocephalides spp. was studied. Ctenocephalides spp. eggs were selected from the pet bedding on which the animal spended most of its time, namely the cats. The studied material was selected with a cosmetic brush. Ctenocephalides spp. eggs were placed into a Petri dish of 10 eggs per each dish. The test material was introduced with a dental probe. There were 4 test dishes, which were treated with insectoacaricides (each test dish was treated with a separate drug) and 1 control dish with no treatment. Microscopy was conducted under a light microscope with magnification X8 of each egg, with following treatment of each egg with insectoacaricides. Monitoring was conducted in 24, 48 and 72 hours after treatment. Results. Research has shown that drugs which demonstrated 100 % ovicidal effectiveness were Sentry Home (pyriproxyfen – 0.02 %, permethrin – 0.2 %, n-Octyl Bicyclohepten – 1.0 %) in 24 hours and Neostomazan (CEVA)(transmix – 5.0 g, tetramethrin – 0.5 g) in 72 hours. Conclusions. Insectoacaricide drug Sentry Home (pyriproxyfen – 0.02 %, permethrin – 0.2 %, n-Octyl Bicyclohepten – 1.0 %), used for the treatment of the premises where the animals live, showed the most pronounced ovicidal effect in 24 hours.

scholarly journals Investigations on the Effects of Five Different Plant Extracts on the Two-Spotted MiteTetranychus urticaeKoch (Arachnida: Tetranychidae)

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Pervin Erdogan ◽  
Aysegul Yildirim ◽  
Betul Sever
Keyword(s):  
Phaseolus Vulgaris ◽  
Plant Extracts ◽  
Broad Spectrum ◽  
Allium Sativum ◽  
Fruit Crops ◽  
Veratrum Album ◽  
Tanacetum Parthenium ◽  
Bean Plants ◽  
Ovicidal Effect ◽  
Economic Pest

Two-spotted mite,Tetranychus urticaeKoch (Arac.: Tetranychidae), is an economic pest worldwide including Turkey, causing serious damage to vegetables, flowers, and fruit crops. In recent years, broad-spectrum insecticides/miticides have been used to control this pest in Turkey. Control is difficult mainly due to resistance to conventional pesticides. This study was conducted to determine efficacy of pesticides extracted from five different plants [i.e.,Allium sativumL. (Amaryllidaceae),Rhododendron luteumS. (Ericaceae),Helichrysum arenariumL. (Asteraceae),Veratrum albumL. (Liliaceae), andTanacetum partheniumL. (Asteraceae)] against this mite. Bioassays were tested by two different methods to determine the effects of varying concentrations. Experiments were performed using 3 cm diameter leaf disk from unsprayed bean plants (Phaseolus vulgarisL.). In addition, the effects of the extracts on reproduction and oviposition were investigated. The extract yielded high mortality. In the lowest-concentration bioassays, the adult mites laid lower numbers of eggs compared to the untreated control. No ovicidal effect was observed.

Lethal and sublethal effects of Azadirachta indica-based products on Tetranychus neocaledonicus (Acari: Tetranychidae)

2021 ◽  
Author(s):  
Mayara Fernandes dos Santos ◽  
Paulo Roberto Ramalho Silva ◽  
Marcus Eugênio O. Briozo ◽  
Joesley Frazão Silva ◽  
Luiz Carlos de Melo Junior ◽  
...  
Keyword(s):  
Sublethal Effects ◽  
Residual Effect ◽  
Lima Bean ◽  
Phaseolus Lunatus ◽  
Choice Test ◽  
Adult Females ◽  
Average Survival ◽  
History Of ◽  
Ovicidal Effect ◽  
Sublethal Concentrations

The objective of this study is to evaluate the toxicity, repellency, and the ovicidal, residual, and sublethal effects of different neem-based commercial formulations on the red mite Tetranychus neocaledonicus André (1933) reared in the laboratory on lima bean (Phaseolus lunatus L.). To evaluate the toxicity on adult females of T. neocaledonicus, different concentrations of Natural Neem® (NN), Off-Neem® (ON), Nim-I-GO® (NG), and Azamax® (AZ) were defined from preliminary tests. The mortality and toxicity ratio were evaluated 48 h after application of the lethal concentrations (LC50s and LC95s). The repellent effect was verified through a two-choice test. The concentration used was the LC50 of the products calculated in the toxicity test. The number of mites attracted, the repellency index (RI), and the percentage of repellency of each product were calculated. The ovicidal effect after application of the LC50s and LC95s of each product and egg viability were observed. To evaluate the residual efficiency, the plants were sprayed with LC50 and LC95 of the products and the leaves were subsequently harvested at 24, 48, and 96h after the application of the products to evaluate mortality and oviposition reduction (PR - percentage of reduction). The sublethal effects were evaluated by applying the LC30 of the products (AZ, NG) to newly emerged females, whose survival and oviposition were evaluated daily. The determined LC50s were 0.39; 0.48; 0.68; and 1.39% for AZ, ON, NN, and NG, respectively. Considering the LC50, AZ was the most toxic product followed by ON, whereas the established LC95s were 2.20; 3.74; 6.10; and 7.98% for NN, ON, AZ, and NG, respectively. All tested products were classified as repellents for adult females of T. neocaledonicus. The eggs of T. neocaledonicus treated with the LC95s of the products had their viabilities inhibited. However, when using the LC50s, NN provided the lowest viability (8.0%), being considered the most toxic for eggs. The products presented reduced residual effect probably due to their rapid degradation. The mites treated with sublethal concentrations showed an average survival in days of 25.43, 28.35, and 29.20 for the treatments with Azamax®, control (untreated), and Nim-I-GO®, respectively. Relatively high oviposition rates in the first weeks decreased until the end of their life cycle. The life history of T. neocaledonicus is affected by sublethal concentrations of neem-based products. It was concluded that the tested products demonstrated acaricidal potential in the control of T. neocaledonicus on P. lunatus, presenting toxicity and repellent and ovicidal effect, although residual and sublethal effects were less significant.

scholarly journals Oviposition Deterrent Activity and Ovicidal Effect of Pometia pinnata Leaves Extract against Dengue Vector, Aedes aegypti (Diftera: Culicidae)

2020 ◽  
Vol 151 ◽  
pp. 01013
Author(s):  
Luthfi Suharyo ◽  
Rizqulla K. Arthari ◽  
Fitria S.N. Rochmah
Keyword(s):  
Aedes Aegypti ◽  
Ethanolic Extract ◽  
Ethanol Extract ◽  
Oviposition Deterrent ◽  
Botanical Insecticides ◽  
Dengue Vector ◽  
Ovicidal Effect ◽  
Potential Alternative ◽  
Oviposition Trap ◽  
Deterrent Activity

Aedes aegypti is the main vector of dengue fever that most commonly occurred in Indonesia. The application of botanical insecticides is being developed as an alternative vector control. Botanical components have been reported as the potential alternative to inhibit the process of oviposition and fecundity suppression. This study aims to determine the oviposition deterrent activity and ovicidal effects of ethanol extract of Pometia pinnata leaves against Aedes aegypti. Oviposition deterrent assay was conducted on twenty bloodfed females in a cage (40 cm x 40 cm x 40 cm). One treated oviposition trap and one control oviposition trap were placed in the opposite corner of the cage. Four replicates were performed for each concentration. The eggs were counted and analyzed after 72 hours of trial. Ethanol extract of Pometia pinnata leaves have antioviposition effect on female mosquitoes Aedes aegypti at 400 ppm (effective repellency / ER = 56.38%; oviposition active index/OAI = -0.39) and 500 ppm (ER = 66.4%; OAI = -0.49). In the ovicidal assay, twentyfive eggs are used for determination ovicidal effect and five replicates were performed for each concentration. The hatched larvae were collected and counted daily. The ethanolic extract of Pometia pinnata leaves at 0.05%, 0,1%, 0.15%, 0.2%, and 0.25% concentration have ovicidal activity of 11%, 28%, 87%, 94%, and 98% against Aedes aegypti eggs, respectively. This study revealed that the ethanol extract of Pometia pinnata leaves could be a potential alternative in controlling the dengue vector.

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