水稻螟虫诱杀植物香根草的发现与应用

The potential of vetiver grass as a biological control for the rice stem borers Chilo suppressalis and Sesamia inferens

香根草Vetiveria zizanioides L.是一种多年丛生的草本植物。近年来研究发现香根草能够有效诱集水稻螟虫(二化螟Chilo suppressalis和大螟Sesamia inferens)雌成虫在其上产卵,但孵化出的幼虫在香根草上不能完成生活史。因此,香根草对于水稻螟虫来讲是一种诱杀植物。开发以香根草为基础的水稻螟虫绿色防控技术,不仅可以有效控制水稻螟虫,减少农药使用,还可以保育寄生蜂等天敌、增强生物多样性。香根草同时具有适应性强、种植管理轻简、无性繁殖不会扩散成为杂草、可供观赏等应用特点。因此,利用诱杀植物香根草为水稻螟虫防治提供了一种生态调控新途径,还可实现农民增收、改善生态环境,具有重要的经济、生态和社会效益。

Vetiver grass, Vetiveria zizanioides is a perennial, tufty, herbaceous plant that is an attractive oviposition site for adult female rice stem borers of the species Chilo suppressalis and Sesamia inferensto. However, because the larvae of these species cannot complete their life cycles on this plant it is effectively a natural trap for these pests. Planting V. zizanioidescontrol C. suppressalis and S. inferens could reduce insecticide use, improve the effectiveness of natural enemies such as parasitoids and enhance biodiversity. V. zizanioides has the advantages of being highly adaptable, easy to plant and manage, ornamental and having a vegetative mode of propagation that prevents it becoming an invasive weed in farmland. Planting this grass could therefore, provide, a new, environmentally-friendly way of controlling of pests that both increases farmers’ income and benefits the environment.