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首页> 外文期刊>Indian Journal of Weed Science >Host preference of Neochetina bruchi Hustache and N. eichhorniae Warner towards leaves and their aqueous extracts of chosen agricultural and horticultural crops.
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Host preference of Neochetina bruchi Hustache and N. eichhorniae Warner towards leaves and their aqueous extracts of chosen agricultural and horticultural crops.

机译：寄主对Neochetina bruchi Hustache和N. eichhorniae Warner的偏爱是选择农作物和园艺作物的叶片及其含水提取物。

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摘要

The water hyacinth weevils, Neochetina bruchi Hustache and Neochetina eichhorniae Warner were studied for their orientation behaviour towards leaves and their aqueous extracts of 18 agricultural and horticultural crops and the host plant Eichhornia crassipes (water hyacinth) under laboratory conditions with the help of a multi-arm olfactometer. Excess proportion index (EPI) was worked out to know the approaching behaviour of the weevils. Both N. bruchi and N. eichhorniae rejected all the crops tested here and preferred water hyacinth only. The EPI values for the leaves of all the crops tested (except paddy and pomegranate) and their extract treatments were only negative, indicating that the weevils rejected the plants. Positive values were obtained in pomegranate (+0.33) and paddy (+0.11) leaf treatments when N. bruchi and N. eichhorniae were used, respectively. In general, extracts were more deterrent to both the weevil species than leaf treatment.
机译：在实验室条件下，借助多种水葫芦，研究了18种农业和园艺作物以及寄主植物凤眼棘（Eichhornia crassipes）（水葫芦）对水葫芦的象鼻虫，Neochchetina bruchi Hustache和Neochetina eichhorniae Warner的叶片定向行为。手臂嗅觉仪。制定了超比例指数（EPI）以了解象鼻虫的接近行为。布鲁奇猪笼草和凤尾猪笼草都拒绝了这里测试的所有农作物，只选择了风信子。所有测试作物（稻谷和石榴除外）及其提取物处理的叶片的EPI值均为负，表明象鼻虫拒绝了该植物。当分别使用布鲁氏猪笼草和凤尾猪笼草时，石榴（+0.33）和水稻（+0.11）叶片处理分别获得正值。通常，提取物对两种象鼻虫的威慑作用都比叶片处理更具威慑力。

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