Journal of Applied Entomology - Zeitschrift für angewandte Entomologie (2002) 126, 550-556

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F. Marquini, R.N.C. Guedes, M.C. Picanço and A.J. Regazzi (2002)
Response of arthropods associated with the canopy of common beans subjected to imidacloprid spraying
Journal of Applied Entomology - Zeitschrift für angewandte Entomologie 126 (10), 550-556
Abstract: Imidacloprid, the first neonicotinoid of potential use in agriculture, became an important agent for controlling leafhoppers, aphids, thrips and whiteflies. The use of this compound was extended to common beans in Brazil, a crop of great socio-economic value throughout Latin America, and the aim of the present work was to assess the temporal effectiveness and environmental safety of this insecticide to the arthropod community associated with the canopy of this crop plant. Thirty six species of phytophagous and detritivorous species were collected, as well as 37 species of predators and parasitoids. However, there was no significant impact of imidacloprid on species richness. In contrast, the insecticide significantly decrease the arthropod abundance for over a 30-day period. This impact is probably a reflection of the effect of this insecticide on Thrips tabaci and Caliothrips brasiliensis (Thysan., Thripidae) the most frequent and abundant species present in the area, and important pests of common beans in Brazil. Among the other most frequent taxa (present in over 50% of the samples), Araneae (predators) and the green leafhopper Empoasca kraemeri (Hom., Cicadellidae), another important bean pest in Brazil, were not significantly affected by imidacloprid, unlike the thrips species T. babaci and C. brasiliensis which showed decreased population levels until 8 days after imidacloprid application.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Raul Narciso C. Guedes, Marcelo Coutinho Picanco

Research topic(s) for pests/diseases/weeds:
health/environmental effects of pesticides
control - general

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Thrips tabaci Beans (Phaseolus)
Empoasca kraemeri Beans (Phaseolus)
Caliothrips phaseoli Beans (Phaseolus)
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