Effect of entomopathogenic fungi, Beauveria bassiana and Metarhizium anisopliae, on Thrips tabaci Lindeman (Thysanoptera: Thripidae) populations in different onion cultivars

Egyptian Journal of Biological Pest Control

Quratul Ain¹  Ata Ul Mohsin¹  Muhammad Naeem¹  Ghulam Shabbir² 

[1] Department of Entomology, Pir Mehr Ali Shah Arid Agriculture University, 46300, Rawalpindi, Pakistan;Department of Plant Breeding and Genetics, Pir Mehr Ali Shah Arid Agriculture University, 46300, Rawalpindi, Pakistan;

关键词: Beauveria bassiana;    Metarhizium anisopliae;    Thrips tabaci;    Onion;    Biological control;   

DOI  :  10.1186/s41938-021-00445-y

来源: Springer

【 摘 要 】

BackgroundThrips tabaci Lindeman (Thysanoptera: Thripidae) is the key pest of onions that causes economic yield losses in commercial onion production in Pakistan. In this study, potential of the entomopathogenic fungi (EPF), Beauveria bassiana and Metarhizium anisopliae, as a bio agent was evaluated to manage buildup of thrips population on onion crop.ResultsEfficacy tests for EPF were conducted against T. tabaci infesting 3 different onion varieties (Phulkara, Swat 1, and Virio 7). Commercial formulations of B. bassiana strain GHA and M. anisopilae strain ESC-1, were evaluated at 4 different concentrations (108, 109, 1010, and 1011 conidia/ml) under field conditions for 2 years. The efficacy was assessed 3, 5, 7, and 10 days after spray application of the whole onion plant. Efficacy expressed as T. tabaci (nymphs and adults) percent population reduction in comparison to controls. Maximum corrected percent population reduction was observed in onion plants treated with B. bassiana 1011 conidia/ml, i.e., 86.62, 84.59, and 86% in Phulkara, Swat 1, and Virio 7 onion varieties respectively, after 10 days of spray application. While onion plants treated with M. anisopliae 108 conidia/ml showed minimum corrected percent population reduction, i.e., 69.42, 68.45, and 69.11% in Phulkara, Swat 1, and Virio 7 onion varieties respectively, after 10 days of spray.ConclusionsBeauveria bassiana could significantly reduce thrips population and could provide a better long-term management of T. tabaci on onion. B. bassiana had a high toxic effect against offspring production of the T. tabaci under field conditions than M. anisopliae.

【 授权许可】

CC BY