首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Toxicity of two ecdysone agonists, halofenozide and methoxyfenozide, against the multicoloured Asian lady beetle Harmonia axyridis (Col., Coccinellidae)
Authors:B Carton  G Smagghe  L Tirry
Institution:Laboratory of Agrozoology, Department of Crop Protection, Faculty of Agricultural and Applied Biological Sciences, Ghent University, Ghent, Belgium
Abstract:Abstract: The insecticidal activity of two ecdysone agonists, methoxyfenozide (RH-2485) and halofenozide (RH-0345), was tested against last-instar larvae of the natural predator Harmonia axyridis (Col., Coccinellidae). In addition, the relative weight gain of the larvae after application was followed. Both products proved to be equally toxic at concentrations of 25, 50 and 100 mg/l. The ecdysteroidal activity of the compounds caused premature induction of larval moulting, cessation of feeding and incomplete pupation in affected larvae. Although, compared with previous results with methoxyfenozide and halofenozide in target pests such as the Colorado potato beetle, Leptinotarsa decemlineata , these compounds caused mortality only after application at relatively high concentrations.
Keywords:Harmonia axyridis            ecdysone agonist  halofenozide  methoxyfenozide  toxicity  larval weight
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号