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首页> 外文会议>International Conference on Vetiver and Exhibition; 20031006-09; Guangzhou(CN) >Can Vetiver Grass be Used to Manage Insect Pests on Crops?
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Can Vetiver Grass be Used to Manage Insect Pests on Crops?

机译：香根草可以用来管理农作物上的害虫吗？

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摘要

Apart from its well known soil conservation properties, vetiver grass (Chrysopogon zizanioides (L.) Roberty; syn. Vetiveria zizanioides (L.) Nash) is reported to be repellent to many insect species. However, infestation of vetiver by pests of other crops has been recorded and concerns raised about vetiver grass being a refuge for insects pests. This paper addresses the benefits that vetiver may have in control of these pests. Chilo partellus, a lepidopterous stem borer of grasses is a pest that is often mentioned in vetiver literature. This insect is a serious pest of maize, rice and other grain crops in Asia and throughout East and Southern Africa where it can cause total crop failure. These observations prompted research on insect/vetiver grass interactions to determine the response of stem borer moths and larvae when they en counter Vetiveria zizanioides plants. The response of moths to vetiver grass, which could be either positive (attraction or arrestment) or negative (repulsion), would determine if vetiver grass could be used as trap crop for C. Partellus in an integrated pest management system. Wild grasses such as Napier grass (Pennisetum purpureum) is successfully used in habitat management systems in East and Southern Africa. Studies were therefore conducted to determine preference of female moths for, vetiver grass compared to maize and to determine the suitability of vetiver, Napier grass and maize for survival of stem borer larvae. Two-choice preference bioassays and larval survival experiments were conducted. Results indicated that vetiver grass was highly preferred for oviposition but that larval survival on vetiver grass was extremely low. Thus, vetiver has potential as trap crop component of an overall "push-pull" strategy to concentrate C. partellus oviposition away from the maize crop and reduce subsequent population development. This technology may also have application in rice pest management.
机译：据报道，香根草（Chrysopogon zizanioides（L.）Roberty； syn。Vetiveria zizanioides（L.）Nash）除具有众所周知的土壤保护特性外，还可以驱除许多昆虫。然而，已经记录了其他农作物的害虫对香根草的侵染，并且人们对香根草作为昆虫害虫的避难所提出了担忧。本文阐述了香根草在控制这些害虫方面的益处。鳞翅目草，虫Chilo partellus是一种香根草文献中经常提到的害虫。这种昆虫是亚洲以及整个东非和南部非洲的玉米，水稻和其他谷物作物的严重害虫，它可能导致整个农作物歉收。这些发现促使人们研究昆虫/香根草之间的相互作用，从而确定bore虫和幼虫在对抗香根草时的反应。飞蛾对香根草的反应可能是正的（吸引或停滞），也可能是负的（排斥），这将决定香根草是否可以用作病虫害综合治理系统中的C. Partellus的诱捕作物。诸如纳皮尔草（Pennisetum purpureum）之类的野草已成功用于东部和南部非洲的栖息地管理系统。因此，进行了研究以确定雌蛾相对于玉米而言更喜欢香根草，并确定香根草，纳皮尔草和玉米对茎bore幼虫存活的适合性。进行了两项选择偏好的生物测定和幼虫存活实验。结果表明，香根草是产卵的首选，但香根草的幼虫存活率极低。因此，香根草具有作为整体“推挽”策略的诱集作物成分的潜力，以使Part。C. partellus产卵集中于远离玉米作物的位置并减少随后的种群发育。该技术也可能在水稻病虫害防治中得到应用。

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