[Bioactivity of Myoporum bontioides extracts to Plutella xylostella].
The bioactivity of Myoporum 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 0.01 gDW x 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 x 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.
Gu
Wenxiang
W
South China Agricultural University, Guangzhou 510642, China. wenxgu@scau.edu.cn
He
Yanbiao
Y
He
Tingyu
T
Pang
Xiongfei
X
Xian
Jidong
J
D000818:Animals; D005419:Flavonoids / Q000302:isolation & purification / Q000494:pharmacology*; D007300:Insect Control; D009036:Moths / Q000254:growth & development*; D031643:Myoporum / Q000737:chemistry*; D010936:Plant Extracts / Q000494:pharmacology
D005419:Flavonoids; D010936:Plant Extracts