Fecundity and egg viability of house fly exposed to insect growth regulators

Park, C.G. . College of Agriculture; Choe, S.Y.; Kim, J.S.; Kim, D.H. . Research Management Bureau; Lee, H.S. .

Fecundity and egg viability of house fly exposed to insect growth regulators

1999

Park, C.G. (Gyeong-sang National University, Chinju (Korea Republic). College of Agriculture) | Choe, S.Y. | Kim, J.S. (Gyeong-sang National University, Chinju College of Veterinary Medicine) | Kim, D.H. (Rural Development Administration, Suwon (Korea Republic). Research Management Bureau) | Lee, H.S. (Gyeongnam Agricultural Research and Extension Service, Chinju (Korea Republic).)

Two-day old house fly adults were exposed to six insect growth regulators, flufenoxuron, teflubenzuron, triflumuron, diflubenzuron, methoxyfenozide, tebufenozide, as a feed additive (milk + 5% sugar + chemical) in the laboratory for 6 days. The number of eggs deposited by the exposed-adults, viability of the eggs, and F1 larval development were checked. All the IGRs tested were found to have no adverse effect on the reproduction of house fly, except methoxyfenozide (210ppm). The most effective inhibitor to egg hatch was flufenoxuron, followed by teflubenzuron, triflumuron, and diflubenzuron. Exposure to flufenoxuron (over 5ppm), teflubenzuron (over 25ppm), triflumuron (over 125ppm), and diflubenzuron (over 125ppm) reduced egg hatchability to 0 to 1.3%, but lower concentrations of these IGRs were less effective (6.3 to 46.3% egg hatchability). Almost all the larvae emerged from eggs deposited by the adults exposed to diflubenzuron (62.5ppm) and teflubenzuron (12.5ppm) failed to develop into pupae, causing total mortalities of 98% and 100%, respectively. However, two IGRs, methoxyfenozide and tebufenozide, did not inhibit egg hatch and F1 larval development, except methoxyfenozide (210ppm) treatment. These results suggest that these 4 IGRs may be used in the development of autosterilization system for house fly control. However, further work is required to develop delivery systems capable of transferring an effective dose to the fly under field conditions.

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