Evaluation of Napier grass (Pennisetum purpureum) varieties for use as trap plants for the management of African stemborer (Busseola fusca) in a push-pull strategy
Evaluation of Napier grass (Pennisetum purpureum) varieties for use as trap plants for the management of African stemborer (Busseola fusca) in a push-pull strategy
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DOI：
10.1111/j.1570-7458.2007.00569.x
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发表时间：
2007-08-01
影响因子：
1.9
通讯作者：
Mumuni, Abdulai
中科院分区：
文献类型：
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作者：
Khan, Zeyaur R.;Midega, Charles A. O.;Mumuni, Abdulai
我们评估了东非各地用作饲料的8个狼尾草[Pennisetum Purpureum Schumach(Poaceae)]品种在通过推-拉策略管理非洲刺蛾Busseola fusca Fuller(鳞翅目：夜蛾科)的潜在诱捕植物中的作用。在实验室和网室条件下测定了这些品种的产卵偏好、幼虫定向、定居、滞留和扩散、取食、死亡和存活以及发育情况。二选一试验表明，只有两个品种(cv.Bana和cv.(乌干达无毛)的产卵优先选择怀孕雌蛾，而不是敏感玉米品种。西部杂交种502。然而，幼虫的喜好是高度可变的。一龄幼虫在玉米叶片上的取食强度明显高于所有供试品种的叶片。取食玉米秆的幼虫和取食不同品种禾本科牧草的幼虫，在24小时内对3龄幼虫的摄食量和同化量没有差异。幼虫在所有禾本科牧草品种上的存活率(低于3%)显著低于在玉米上的存活率(约44%)。与此类似，大多数禾本科牧草品种的幼虫发育时间延长了约2-3周。结论是cv.BANA作为诱捕植物在褐飞虱的管理中具有潜在的应用价值，因为它在产卵方面更受飞蛾的喜爱，在定位、定居和滞留方面与玉米一样受幼虫的喜爱，并且允许幼虫的最小存活。因此，它可以与像金线莲这样的‘推进型’植物一起使用。(豆科)在‘推-拉’战略中，但这种战略的有效性将严格取决于这些伴生植物的适当建立和管理。
We evaluated eight Napier grass [Pennisetum purpureum Schumach (Poaceae)] varieties, used in various parts of eastern Africa as fodder, for their potential role as trap plants in the management of the African stemborer, Busseola fusca Fuller (Lepidoptera: Noctuidae) through a push-pull strategy. Oviposition preference, larval orientation, settling, arrest and dispersal, feeding, mortality and survival, and development were determined for each of these varieties under laboratory and screen house conditions. Two-choice tests showed that only two of the varieties tested (cv. Bana and cv. Uganda Hairless) were preferentially chosen by gravid female moths for oviposition over a susceptible maize variety, cv. Western Hybrid 502. Larval preference was, however, highly variable. Larval feeding by first instars on the maize leaves was more intense and significantly more than on leaves of all the Napier grass varieties evaluated. Food consumed and amounts assimilated by the third instars over a 24-h period were not different among larvae fed on stems of maize and those fed on stems of the various Napier grass varieties. Larval survival was significantly lower on all the Napier grass varieties (below 3%) than on maize (about 44%). Similarly, larval development was about 2-3 weeks longer on majority of the Napier grass varieties. It was concluded that cv. Bana had potential for use as a trap plant in the management of B. fusca because it was more preferred by the moths for oviposition, equally preferred as maize by the larvae for orientation, settling, and arrest, and allowed minimal survival of the larvae. It can thus be used with such 'push' plants as Desmodium spp. (Fabaceae) in a 'push-pull' strategy, but the effectiveness of such a strategy would strictly depend on proper establishment and management of these companion plants.