Modes of action of fraxinellone against the tobacco budworm,Heliothis virescens

Modes of action of fraxinellone against the tobacco budworm,Heliothis virescens

Zhi Long Liu;Shuit Hung Ho;Swee Hock Goh

【期刊名称】《中国昆虫科学：英文版》 【年(卷),期】2009(016)002

【摘要】Fraxinellone significantly reduced the relative growth rate, food consumption rate as well as the efficiency of conversion of ingested food into biomass of Heliothis virescens when incorporated into artificial diets at concentrations of 4.31 × 10-5 mol/L and above. After being fed with fraxinellone-treated diets for 24 h, the larval midguts of H. virescens possess significantly lower activities of a-amylase and non-specific proteases and higher activities ofcytochrome P450s. In vitro, the compound did not inhibit the activities of α-amylase and non-specific proteases extracted from the larval midguts. Clear evidence of post-ingestive toxicity of fraxinellone to midgut cells was observed under an electron microscope. The modes of action of the compound against insects were discussed. 【总页数】9页(147-155) 【关键词】

【作者】Zhi Long Liu;Shuit Hung Ho;Swee Hock Goh

【作者单位】Department of Entomology, China Agricultural University, Beijing, China;Department of Biological Sciences, National University of