Journal of Taiwan Agricultural Research

Author:Yaw-Jen Dong, Ling-Lan Cheng and Chien-Chung Chen*

Abstract:

    Ten insecticides were assayed in the laboratory for toxicity to the melon fly (Bactrocera cucurbitae) by spray tower method, residue film method, and bitter gourd dipping method. Spray and residue film tests showed that malathion, diazinon, dimethoate, fenitrothion, chlorprrifos, fenthion, and deltamethrin caused 100% death of flies in 4 hr after treatment. Spinosad and abamectin both caused 100% death of flies in 72 hr after treatment with the spray tower method, 24 and 48 hr, respectively, with the residue film method. Neemix was ineffective against the melon fly. Results of the bitter gourd dipping test showed that fenthion and deltamethrin were the most toxic insecticides tested against female flies in terms of mortality and reduced the number of eggs laid by the female flies on the bitter gourds. We conclude that abamectin has the greatest potential for controlling B. cucurbitae among the insecticides tested in this experiment.

Key words:Bactrocera cucurbitae, Insecticides, Toxicity

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