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<p>This study investigated the potential of indigenous entomopathogenic bacterial (EPB) strains from Egypt to control the two most prevalent locust species, <i>Schistocerca gregaria</i> (Forsskål) (Orthoptera: Acrididae), and <i>Locusta migratoria migratorioides</i> (Reiche &amp; Fairmaire) (Orthoptera: Acrididae). To assess the efficacy of the EPB strains, experiments were conducted in the laboratory, semi field, and field. The results showed that <i>Xenorhabdus nematophila</i> (Thomas et Poinar) BA2 (Enterobacterales: Morganellaceae) and <i>Photorhabdus luminescens</i> (Thomas et Poinar) EGAP3 (Enterobacterales: Morganellaceae) were the most effective strains against <i>S. gregaria</i> and <i>L. migratoria migratorioides</i> in laboratory settings. Under semi-field conditions, <i>X. nematophila</i> BA2 recorded nymphal mortality rates of 89.31% and 85.00% against the 2<sup>nd</sup> and 5<sup>th</sup> nymph instars of <i>S. gregaria</i>, respectively, and <i>P. luminescens</i> EGAP3 showed nymphal mortality rates of 88.00% and 80.00% against the 2<sup>nd</sup> and 5<sup>th</sup> nymph instars of <i>S. gregaria</i>, respectively. In field trials, <i>X. nematophila</i> BA2 exhibited the highest nymphal mortality rate of 88.70% at 7 days after spraying. Overall, the findings of this study suggest that <i>X. nematophila</i> BA2 and <i>P. luminescens</i> EGAP3 are promising candidates for environment-friendly, safe locust pest management. Further research is needed to explore and develop these bacteria for commercial use in agriculture.</p>

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Biological control of Schistocerca gregaria and Locusta migratoria migratorioides using Entomopathogenic bacteria

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年2月7日

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  • Jihan Muhammad,
  • Zeinab Fathy,
  • Saad Moussa

摘要

This study investigated the potential of indigenous entomopathogenic bacterial (EPB) strains from Egypt to control the two most prevalent locust species, Schistocerca gregaria (Forsskål) (Orthoptera: Acrididae), and Locusta migratoria migratorioides (Reiche & Fairmaire) (Orthoptera: Acrididae). To assess the efficacy of the EPB strains, experiments were conducted in the laboratory, semi field, and field. The results showed that Xenorhabdus nematophila (Thomas et Poinar) BA2 (Enterobacterales: Morganellaceae) and Photorhabdus luminescens (Thomas et Poinar) EGAP3 (Enterobacterales: Morganellaceae) were the most effective strains against S. gregaria and L. migratoria migratorioides in laboratory settings. Under semi-field conditions, X. nematophila BA2 recorded nymphal mortality rates of 89.31% and 85.00% against the 2nd and 5th nymph instars of S. gregaria, respectively, and P. luminescens EGAP3 showed nymphal mortality rates of 88.00% and 80.00% against the 2nd and 5th nymph instars of S. gregaria, respectively. In field trials, X. nematophila BA2 exhibited the highest nymphal mortality rate of 88.70% at 7 days after spraying. Overall, the findings of this study suggest that X. nematophila BA2 and P. luminescens EGAP3 are promising candidates for environment-friendly, safe locust pest management. Further research is needed to explore and develop these bacteria for commercial use in agriculture.