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首页> 外文期刊>Southwestern Entomologist >Pathogenicity of the Hypocreales Fungi Beauveria bassiana and Metarhizium anisopliae against Insect Pests of Tomato
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Pathogenicity of the Hypocreales Fungi Beauveria bassiana and Metarhizium anisopliae against Insect Pests of Tomato

机译：番茄白僵菌和白僵菌对番茄害虫的致病性

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摘要

Silverleaf whitefly, Bemisia tabaci Gennadius (Aleyrodidae), potato/tomato psyllid, Bactericera cockerelli Sulc. (Triozidae), and western flower thrips, Frankliniella occidentalis (Pergande) (Thripidae), are insect pests of economic importance in tomato (Solanum lycopersicum L.) and other solanaceous vegetables in Mexico. Soil is the main reservoir for many entomopathogenic fungi known as biological control agents important for IPM, but only a few strains obtained from soil have been used against insect pests. In this study, the biological activity of two native isolates of entomopathogenic fungi (from soil at Chihuahua, Mexico), was evaluated against immatures of the three insect pests in a laboratory. Beauveria bassiana (Balsamo) Vuillemin (Hypocreales: Clavicipitaceae) (Bb-CIAD1) isolate was more virulent than the Metarhizium anisopliae (Metschnikoff) Socorin (Hypocreales: Clavicipitaceae) (Ma-CIAD1) isolate. Mortality based on mycosis varied significantly 8 days after inoculation. The number of immature insects infected by fungi was correlated with spore concentration. Beauveria bassiana (Bb-CIAD1) and M. anisopliae (Ma-CIAD1) had LT50 values of 5.6-6.4 and 5.3-6.5 days, respectively. The results indicated that psyllids, thrips, and whiteflies were susceptible to the native fungal isolates with potential as microbial control agents. Based on the results, we suggest the native isolates of entomopathogenic fungi from soil could be used as biological control agents of many other insect pests.
机译：银叶粉虱，烟粉虱（Bemisia tabaci Gennadius（Aleyrodidae），马铃薯/番茄木虱，Bactericera cockerelli Sulc。 （Triozidae）和西部花蓟马Frankliniella occidentalis（Pergande）（Thripidae）是墨西哥的番茄（Solanum lycopersicum L.）和其他茄科蔬菜中具有重要经济意义的害虫。土壤是许多昆虫致病性真菌（主要是对IPM至关重要的生物防治剂）的主要贮藏库，但仅从土壤中获得的少数菌株已用于防治害虫。在这项研究中，在实验室中评估了两种本地病原真菌（来自墨西哥奇瓦瓦州的土壤）的生物活性对三种害虫的未成熟性的影响。球孢白僵菌（Balsamo）Vuillemin（hypocreales：Clavicipitaceae）（Bb-CIAD1）分离物的毒性要比金属异化菌（Metschnikoff）（Metschnikoff）Socorin（Hypocreales：Clavicipitaceae）（Ma-CIAD1）分离的毒力更高。接种后8天，基于霉菌病的死亡率差异很大。真菌感染的未成熟昆虫的数量与孢子浓度相关。球孢白僵菌（Bb-CIAD1）和南美白僵菌（Ma-CIAD1）的LT50值分别为5.6-6.4天和5.3-6.5天。结果表明木虱，蓟马和粉虱对天然真菌分离株敏感，具有作为微生物防治剂的潜力。根据结果​​，我们建议从土壤中分离出昆虫病原真菌的天然分离株可用作许多其他害虫的生物防治剂。

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