Toxicity of derris extract (Derris elliptica Benth) to Asiatic corn borer (Ostrinia furnacalis (Guenee)) and synergism with PBO
2003
Suprada Sukonthabhirom Na Pattalung(Department of Agriculture, Bangkok (Thailand). Field Crops Research Institute. Chainat Field Crops Research Center) | Surapol Visetson(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Science. Department of Zoology) | Mantana Milne(Department of Agriculture, Bangkok (Thailand). Agricultural Production Science Research and Development Office) | Apichai Dao-rai(Kasetsart University. Bangkhen Campus, Bangkok (Thailand). Faculty of Agriculture. Department of Entomology) | Sukapong Vayuparp(Department of Agriculture, Bangkok (Thailand). Field Crops Research Institute. Chainat Field Crops Research Center)
Toxicity of extract from roots of derris (Derris elliptica Benth) and synergism with piperonyl butoxide (PBO) 10 ppm was observed against asiatic corn borer (Ostrinia furnacalis (Guenee)), using the extracts containing different concentrations of the active substance, rotenone. The LC sub(50) of derris extract to 2nd-3rd instar larvae were 30.71 ppm and 4.28 ppm at 3 and 5-day post exposure, respectively. PBO at 10 ppm showed 3-fold synergism with derris extract at 3-day post exposure but at 5-day post exposure showed no synergism, indicating that PBO can accelerate the toxicity of rotenone. However, mortality of the larvae fed with the extract containing rotenone 10 ppm plus PBO 10 ppm not increased. Antagonism was exhibited by the mixture of extracts from derris and neem (Azadirachta indica var. siamensis Valeton).
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This bibliographic record has been provided by Thai National AGRIS Centre, Kasetsart University
