Journal of Environmental Science Health. B (2003) 38, 757-769
Lenli C. Otoidobiga, Charles Vincent and Robin K. Stewart (2003)
Field efficacy and baseline toxicities of pyriproxifen, acetamiprid, and diafenthiuron against Bemisia tabaci Gennadius (Homoptera: Aleyrodidae) in Burkina Faso (West Africa)
Journal of Environmental Science and Health, Part B 38 (6), 757-769
Abstract: Bioassays were conducted in 2001 and 2002 to estimate toxicities and dose-Response relationships of 24 Bemisia tabaci Gennadius populations to pyriproxifen, acemitaprid, and diafenthiuron. LC50s ranging from 0.014 to 0.096 mgL-1, 0.60 to 1.3 mgL-1, and 3.5 to 6.7 mgL-1 were observed respectively for pyriproxifen, acemitaprid, and diafenthiuron. These LC50s were much lower than the field doses recommended for each compound. A fast increase in rates of mortality within a narrow range of lethal concentrations was observed for each compound, indicating that all three compounds were highly effective at killing whiteflies.
In a separate experiment, pyriproxifen, acemitaprid, and diafenthiuron were tested in 2001 and 2002 to compare their effectiveness and assess their impact on parasitism in the field. In both years all three compounds significantly prevented B. tabaci populations from reaching economic injury levels in cotton and minimized adverse effects on parasitism. Our results provide for the first time baseline toxicological, field efficacy, and effect on parasitism data for pyriproxifen, acemitaprid, and diafenthiuron against B. tabaci in West Africa. These compounds should be included in a resistance management program of the cotton pest complex and their use should be restricted to prevent the building of resistance in B. tabaci populations.
(The abstract has been supplied by the author or ISPI and is excluded from the Creative Commons licence.)
Link to article at publishers website
Database assignments for author(s): Charles Vincent
Research topic(s) for pests/diseases/weeds:
control - general
Pest and/or beneficial records:
|Bemisia tabaci||Cotton (Gossypium)||Burkina Faso|