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Title: Toxicity Assessment of Selected Neonicotinoid Pesticides against the Sand Termite, Psammotermes Hypostoma Desneux Workers (Isoptera: Rhinotermitidae) under Laboratory Conditions
Authors: M A.I. Ahmed; S.A. Eraky; M. Fakeer ; A.S. Soliman
Aff: Plant Protection Dept., Faculty of Agric., Assiut Univ., Assiut 71526 Egypt
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Keywords: Neonicotinoids; Sand Termite; Chlorpyrifos; New Valley; Termite Control
Abstract:Background: Sand termites, Psammotermes hypostoma Desneux, in New Valley, Egypt cause millions of Egyptian pounds worth of damage annually, including the cost of controlling them and repairing the damage to structures. Objective: We evaluate selected neonicotinoid pesticides, Imidacloprid (20% SL), Acetamiprid (20% SP), and Thaimethoxam (40% WG and 18.6% SC), comparing to one organophosphate pesticide, Chlorpyrifos (48% EC), on sand termite, Psammotermes hypostoma Desneux workers, using two methods, cardboard-dip bioassay and termite workers-dip bioassay. However, the mortality percentage was recorded after 3, 6, 12, 24 h. Results: The toxicity from termite workers-dip bioassay method was greater than from cardboard-dip bioassay. Moreover, the LC50 values decreased after 24 h compared with the 3 h data. Furthermore, Chlorpyrifos (48% EC) considered the most potent pesticides among all pesticides tested whereas Imidacloprid (20% SL) considered the most potent among the neonicotinoid pesticides tested. Conclusion: These results indicate that selected neonicotinoid pesticides are promising tools in the potential of controlling the sand termites.