PDF(Pubmed)
Abstract：
The fall armyworm (Spodoptera frugiperda Smith) is an invasive and polyphagous insect pest. It poses a significant threat to maize crops, uncontrolled infestation can result 100 % loss. However, natural enemies play a vital role in regulating the population of this pest. Additionally, botanical sources extracts have the potential to be effective insecticides. The objectives of the study were to investigate the natural enemies of S. frugiperda in the Gurage zone and to compare efficacy of Neem seed and leaf aqueous extracts with S. frugiperda larvae, central Ethiopia. S. frugiperda larvae and egg masses, cocoons and larvae cadavers collected from infested maze farms. From each round collection 25 healthy and inactive larvae were sampled to rear until emerging adults. Observed predator species recorded. Neem seed and leaf aqueous extracts was tested against S. frugiperda in laboratory condition. The study found a diverse range of natural enemies associated with S. frugiperda, including parasitoids, predators, and entomopathogenic fungi. Three species of parasitoids (Exorista xanthaspis, Tachina spp., and Charops annulipes) were documented in Ethiopia for the first time. Predatory insects belonging to four distinct orders: Hemiptera, Dermaptera, Coleoptera, and Mantodea also identified. In particular, various Hemipterans were observed in the maize farms infested with S. frugiperda. In terms of Neem seed and leaf aqueous extracts, they demonstrated similar mortality rates for S. frugiperda larvae after 72 h, although differences were observed at 24 and 48 h. For effective management of S. frugiperda, more research is needed to fully exploit the potential of natural enemies and botanical source insecticides.
摘要：
秋季粘虫（SpodopterafrugiperdaSmith）是一种侵入性和多食性害虫。对玉米作物构成重大威胁,不受控制的侵扰可导致100%的损失。然而,天敌在调节这种害虫的种群中起着至关重要的作用。此外,植物源提取物有可能成为有效的杀虫剂。该研究的目的是调查Gurage区的S.frugiperda的天敌，并比较印尼树种子和叶水提取物与S.frugiperda幼虫的功效，埃塞俄比亚中部。美国frugiperda幼虫和卵团，从出没的迷宫农场收集的茧和幼虫尸体。从每个回合收集中，对25只健康和不活跃的幼虫进行采样，直到成年。观察到的捕食者物种记录。在实验室条件下测试了印em种子和叶的水性提取物对S.frugiperda的影响。该研究发现了与S.frugiperda相关的各种天敌，包括寄生虫,捕食者,和昆虫病原真菌。三种寄生虫（Exoristaxanthaspis，Tachinaspp.,和Charopsannulipes）首次在埃塞俄比亚被记录在案。捕食性昆虫属于四个不同的顺序：半翅目，Dermaptera,鞘翅目,曼托迪亚也确认了身份。特别是,在受S.frugiperda感染的玉米农场中观察到各种半翅目动物。在印本植物种子和叶的水提物方面，他们在72小时后表现出相似的Frugiperda幼虫死亡率，尽管在24小时和48小时观察到差异。为了有效管理S.frugiperda，需要更多的研究来充分利用天敌和植物源杀虫剂的潜力。
