Oviposition deterrence and ovicidal activity of Mikania micrantha extracts on Tirathaba rufivena (Lepidoptera:Pyralidae)

【Aim】This study aims to explore the repellent effect of Mikania micrantha on the palm pest Tirathaba rufivena. 【Methods】The oviposition deterrence and ovicidal activity of M. micrantha extracts with different solvents against T. rufivena were studied with bioassay methods in the laboratory.【Results】Among different solvent extracts,the M. micrantha extracts from hexane and chloroform had the highest oviposition deterrent activities against T. rufivena,with the deterrent rates of 43. 64% and44. 20% in choice test,and 51. 60% and 59. 20% in non-choice test,respectively. All extracts showed ovicidal activities against T. rufivena,while the chloroform extract showed the strongest impact on hatchability with the lowest corrected egg hatching rate( 53. 39%) and caused the highest corrected mortality( 42. 64%) to the 1st instar larvae. Among the different solvent extracts of M. micrantha by chloroform extraction,the butanol extract showed the highest oviposition deterrent and ovicidal activity against T. rufivena. 【Conclusion】M. micrantha extracts show a great application potential in ecological control of T. rufivena based on the oviposition deterrence and ovicidal activity.

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