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Entomopathogenic fungus isolates for adult Tuta absoluta (Lepidoptera: Gelechiidae) management and their compatibility with Tuta pheromone
Journal of Applied Entomology ( IF 1.7 ) Pub Date : 2020-08-20 , DOI: 10.1111/jen.12812
Komivi S. Akutse 1 , Sevgan Subramanian 1 , Fathiya M. Khamis 1 , Sunday Ekesi 1 , Samira A. Mohamed 1
Affiliation  

Tomato, Solanum lycopersicum, is a widely consumed and economically important vegetable in the tropics. However, its production and productivity have been recently hampered by the invasive Tuta absoluta (Meyrick), a key pest of tomato causing extensive economic damage in Africa. Currently, the commonly used management strategy is synthetic insecticides with hazardous effects on humans and environment. The application of entomopathogenic fungal and viral‐based biopesticides is promising alternatives. To identify potent strains, pathogenicity of dry conidia of 12 Metarhizium anisopliae isolates was evaluated against adult T. absoluta. Further effects of the most potent isolates on pupation through the late 4th instar larval infection, adult emergence and horizontal transmission of inoculum were assessed. Metarhizium anisopliae ICIPE 18, ICIPE 20 and ICIPE 665 outperformed the other isolates causing adult mortality of 95.0%, 87.5% and 86.25%, respectively. The three potent isolates differed significantly for LT50 values of 5.13, 3.17 and 2.38 days for ICIPE 18, ICIPE 20 and ICIPE 665, respectively. Pupation and adult emergence were significantly reduced by these potent isolates, which were also compatible with Tuta pheromone (TUA‐Optima®) with ≥90% conidial germination 24 hr post‐exposure. These potent isolates could be developed as effective biopesticides and used in combination with TUA‐Optima® for mass trapping and autodissemination for T. absoluta management in solanaceous crop production systems.

中文翻译:

用于成年 Tuta absoluta(鳞翅目:Gelechiidae)管理的昆虫病原真菌分离物及其与 Tuta 信息素的相容性

番茄,Solanum lycopersicum,是热带地区一种广泛消费且具有重要经济意义的蔬菜。然而,其生产和生产力最近受到入侵的 Tuta absoluta (Meyrick) 的阻碍,这是一种在非洲造成广泛经济损失的主要番茄害虫。目前,常用的管理策略是对人类和环境有危害的合成杀虫剂。昆虫病原真菌和基于病毒的生物农药的应用是有希望的替代品。为了鉴定有效菌株,评估了 12 个绿僵菌分离株的干燥分生孢子对成年 T. absoluta 的致病性。评估了通过 4 龄后期幼虫感染、成虫出现和接种物水平传播对化蛹的最有效分离株的进一步影响。绿僵菌 ICIPE 18, ICIPE 20 和 ICIPE 665 的表现优于其他分离株,导致成人死亡率分别为 95.0%、87.5% 和 86.25%。对于 ICIPE 18、ICIPE 20 和 ICIPE 665,三种有效分离株的 LT50 值分别为 5.13、3.17 和 2.38 天,差异显着。这些有效的分离物显着减少了化蛹和成虫出现,这些分离物也与 Tuta 信息素 (TUA-Optima®) 相容,在暴露后 24 小时,孢子萌发率≥90%。这些有效的分离株可以开发为有效的生物农药,并与 TUA-Optima® 结合使用,用于茄科作物生产系统中 T. absoluta 管理的质量捕获和自动传播。ICIPE 18、ICIPE 20 和 ICIPE 665 分别为 3.17 和 2.38 天。这些有效的分离物显着减少了化蛹和成虫的出现,它们也与 Tuta 信息素 (TUA-Optima®) 兼容,在暴露后 24 小时,孢子萌发率≥90%。这些有效的分离株可以开发为有效的生物农药,并与 TUA-Optima® 结合使用,用于茄科作物生产系统中 T. absoluta 管理的质量捕获和自动传播。ICIPE 18、ICIPE 20 和 ICIPE 665 分别为 3.17 和 2.38 天。这些有效的分离物显着减少了化蛹和成虫的出现,它们也与 Tuta 信息素 (TUA-Optima®) 兼容,在暴露后 24 小时,孢子萌发率≥90%。这些有效的分离株可以开发为有效的生物农药,并与 TUA-Optima® 结合使用,用于茄科作物生产系统中 T. absoluta 管理的质量捕获和自动传播。
更新日期:2020-08-20
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