The aim of this study was to investigate the possibility of eradicating the red imported fire ant, Solenopsis invicta Buren, in the hot, humid and rainy conditions of northern Taiwan. Thirteen hectares of the Shihmen ...The aim of this study was to investigate the possibility of eradicating the red imported fire ant, Solenopsis invicta Buren, in the hot, humid and rainy conditions of northern Taiwan. Thirteen hectares of the Shihmen Reservoir have been infected with these ants, with a total of 1 578 mounds. Pyriproxyfen was applied at a rate of 2 kg/hectare each season, for a total of four seasons. Surveys using visual examination, bait traps, as well as the population index method showed that the brood, the reproductive ants, and the worker ants within the nests were all significantly reduced 1 month after the first application of pyriproxyfen. Four months after the initial application there were no more brood or reproductive ants. After 8 months there were no longer any active mounds left, and 12 months later there were no more worker ants. After monitoring for 1 more year, it was ascertained that the red imported fire ants were eradicated. The percentages of decrease after 2, 4 and 6 months of treatment were 57.4%, 80.5%, and 98.2%, respectively.展开更多
目的摸索2种生长调节剂对家蝇控制所需剂量,为今后蝇类防治提供依据。方法将猪粪堆成面积1 m^2厚0.15 m的粪堆,分别将吡丙醚、灭蝇胺按不同剂量均匀喷洒到猪粪堆上,并在施药前后定期观察蝇蛆蛹的数量,计算出其相应的相关密度指数及羽化...目的摸索2种生长调节剂对家蝇控制所需剂量,为今后蝇类防治提供依据。方法将猪粪堆成面积1 m^2厚0.15 m的粪堆,分别将吡丙醚、灭蝇胺按不同剂量均匀喷洒到猪粪堆上,并在施药前后定期观察蝇蛆蛹的数量,计算出其相应的相关密度指数及羽化抑制率。结果在施药后的3~24 d,吡丙醚施药剂量按0.1 g a.i/m^2,其羽化抑制率为25.55%~86.31%,0.15、0.3 g a.i/m^2时为52.61%~100%;灭蝇胺0.5g a.i/m^2其羽化抑制率在18.34%~86.03%,施药后26 d时为24.18%;0.75 g a.i/m^2时为78.85%~100%,施药后24 d为100%;1、2 g a.i/m^2为77.88%~100%,后二者剂量24 d后均为100%。结论由于昆虫生长调节剂毒性低,使用安全,无交叉抗性,持效期长,在控制蝇类孳生中值得推广应用。展开更多
文摘The aim of this study was to investigate the possibility of eradicating the red imported fire ant, Solenopsis invicta Buren, in the hot, humid and rainy conditions of northern Taiwan. Thirteen hectares of the Shihmen Reservoir have been infected with these ants, with a total of 1 578 mounds. Pyriproxyfen was applied at a rate of 2 kg/hectare each season, for a total of four seasons. Surveys using visual examination, bait traps, as well as the population index method showed that the brood, the reproductive ants, and the worker ants within the nests were all significantly reduced 1 month after the first application of pyriproxyfen. Four months after the initial application there were no more brood or reproductive ants. After 8 months there were no longer any active mounds left, and 12 months later there were no more worker ants. After monitoring for 1 more year, it was ascertained that the red imported fire ants were eradicated. The percentages of decrease after 2, 4 and 6 months of treatment were 57.4%, 80.5%, and 98.2%, respectively.
文摘目的摸索2种生长调节剂对家蝇控制所需剂量,为今后蝇类防治提供依据。方法将猪粪堆成面积1 m^2厚0.15 m的粪堆,分别将吡丙醚、灭蝇胺按不同剂量均匀喷洒到猪粪堆上,并在施药前后定期观察蝇蛆蛹的数量,计算出其相应的相关密度指数及羽化抑制率。结果在施药后的3~24 d,吡丙醚施药剂量按0.1 g a.i/m^2,其羽化抑制率为25.55%~86.31%,0.15、0.3 g a.i/m^2时为52.61%~100%;灭蝇胺0.5g a.i/m^2其羽化抑制率在18.34%~86.03%,施药后26 d时为24.18%;0.75 g a.i/m^2时为78.85%~100%,施药后24 d为100%;1、2 g a.i/m^2为77.88%~100%,后二者剂量24 d后均为100%。结论由于昆虫生长调节剂毒性低,使用安全,无交叉抗性,持效期长,在控制蝇类孳生中值得推广应用。