Bioactivity of Myoporum bontioides extracts to Plutella xylostella

Abstract

Abstract: The bioactivity of Myopdrum bontioides extracts to Plutella xylostella was studied with IIPC as evaluated index.The results showed that petroleum ether and chloroform extracts had a higher activity than ethyl acetate and alcohol extracts.At 0.01gDW·ml^-1,the ODR of petroleum ether and chloroform extracts was 84.69% and 79 90%,and 76.47% and 45.70% after treated 1d and 3d,while the IIPC was 0.1565 and 0.2055,respectively.Provided with a higher concentration of 0.05 gDW·ml^-1,the ODR was 88.52% and 72.25%,and 87 33%,58.37%,while the IIPC was 0.1125 and 0.2620,respectively.From the chloroform extract of Myopdrum Bontioides,three flavonoids,2,3-dihydro-5,7-dihydroxy-2-phenyl-4H-1-Benzopyran-4-one(Ⅰ),3,5,7-trihydroxy-2-phenyl-4H-1-Benzopyran-4-one(Ⅱ)and 5,7-dihydroxy-3-methoxy-2-(4-methoxyphenyl)-4H-1-Benzopyran-4-one(Ⅲ),were isolated,and their structure were identified based on the analyses of physical and spectrum data.Among these compounds,(Ⅱ)had a better bioactivity to Plutella xylostella.

Key words: Myoporum bontioides, Plutella xylostella, Bioactivity, Flavonoids

CLC Number:

GU Wenxiang, HE Yanbiao, HE Tingyu, PANG Xiongfei, XIAN Jidong. Bioactivity of Myoporum bontioides extracts to Plutella xylostella[J]. Chinese Journal of Applied Ecology, 2004, (7): 1171-1173.

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