Effects of Trap Plant Vetiver Grass (Vetiveria zizanioides) on Nutritional and Digestive Enzyme Activities of Pink Stem Borer (Sesamia inferens) Larvae

doi:10.16409/j.cnki.2095-039x.2017.05.020

Abstract

Abstract: Vetiver grass (Vetiveria zizanioides) can effectively attract Sesamia inferens to lay eggs, while the larvae can not complete their life cycles by feeding on vetiver, and vetiver exhibits a lethal effect on S. inferens larvae. To understand the lethal mechanism of vetiver against the larvae of S. inferens, we determined the nutritional and digestive enzyme activities of S. inferens larvae feeding on vetiver. The results indicated that vetiver affected the larval growth efficiency and digestive enzyme activities, compared to the larvae feeding on rice. ECI and ECD were significantly decreased in the larvae feeding on vetiver. Except for sucrase, activities of the other digestive enzymes were significantly decreased in some specific stages of larvae feeding on vetiver. The protease activity of the 4 instar larvae, the amylase activities of 2-4 instar larvae and the trehalase activities of 1-4 instar larvae feeding on vetiver were significantly decreased, while sucrase activity of 1-3 larvae was significantly increased compared to the larvae feeding on rice. The findings of this study lay a foundation for further elucidating the lethal mechanism of vetiver against S. inferens, and provide a theoretical basis for the development of sustainable control technology for S. inferens based on the application of trap plant vetiver in rice ecosystem.

Key words: Sesamia inferens, vetiver grass, nutrition, digestive enzyme, trap plant

CLC Number:

S476

LU Yanhui, LIANG Qi, ZHENG Xusong, LÜ Zhongxian. Effects of Trap Plant Vetiver Grass (Vetiveria zizanioides) on Nutritional and Digestive Enzyme Activities of Pink Stem Borer (Sesamia inferens) Larvae[J]. journal1, 2017, 33(5): 719-724.

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