onion thrips, thrips tabaci, is the most important pest of onion in isfahan. onion growers often rely on the pesticide spraying. imidacloprid is frequently used against this pest. to investigate the thrips resistance to this insecticide, 10 onion-growing regions of isfahan were selected. after their laboratory rearing, certain concentrations of imidacloprid were applied to these populations, us...

Systemic activity of the neonicotinoids clothianidin, dinotefuran, and thiamethoxam and the anthranilic diamide chlorantraniliprole was tested against adult black vine weevils, Otiorhynchus sulcatus (F.) (Coleoptera: Curculionidae), on Astilbe, Euonymus, Heuchera, Rhododendron, Sedum, and Taxus. Insecticide treatments were applied to the soilless substrate of containerized plants. Bioassays wer...

Neonicotinoids are one of the newest groups systemic pesticides, effective on a wide range invertebrate pests. The success neonicotinoids can be assessed according to amount used, for example, in Czech Republic, which now accounts 1/3 insecticide market. European Union (EU) has relatively interesting attitude towards neonicotinoids. Three neonicotinoid substances (imidacloprid, clothianid...

BACKGROUND Seed-applied neonicotinoids are widely used in agriculture, yet their effects on non-target species remain incompletely understood. One important group of non-target species is arthropod natural enemies (predators and parasitoids), which contribute considerably to suppression of crop pests. We hypothesized that seed-applied neonicotinoids reduce natural-enemy abundance, but not as st...

Neonicotinoid insecticides have been themost commonmanagement tool for Colorado potato beetle, Leptinotarsa decemlineata (Say), infestations in cultivated potato for nearly 20 yr. The relative ease of applying neonicotinoids at planting coupled with inexpensive, generic neonicotinoid formulations has reduced the incentive for potato growers to transition from these products to other mode of act...

Since 1995, neonicotinoid insecticides have been a critical component of arthropod management in potato, Solanum tuberosum L. Recent detections of neonicotinoids in groundwater have generated questions about the sources of these contaminants and the relative contribution from commodities in U.S. agriculture. Delivery of neonicotinoids to crops typically occurs as a seed or in-furrow treatment t...

BACKGROUND & OBJECTIVES Due to ever growing insecticide resistance in mosquitoes to commonly used insecticides in many parts of the globe, there is always a need for introduction of new insecticides for the control of resistant vector mosquitoes. In this study, larvicidal and adulticidal efficacies of three neonicotinoids (imidacloprid, thiacloprid and thiamethoxam) were tested against resistan...

BACKGROUND Select populations of Colorado potato beetle, Leptinotarsa decemlineata, in Wisconsin have recently become resistant to soil-applied neonicotinoids in potato. Sublethal insecticide concentrations persisting in foliage through the growing season may select for resistance over successive years of use. Over the 2 years of this study, the aim was to document the in-plant insecticide conc...

Binding-site interactions of nicotinic insecticides have been de ned by comparative chemical and structural biology approaches using mollusk acetylcholine binding proteins which serve as structural surrogates of the insect and vertebrate nicotinic acetylcholine receptor (nAChR) subtypes. Neonicotinoids with an electronegative pharmacophore are embraced by a reversed position in the binding pock...