Fathy Hayam M, Awad Mona, Alfuhaid Nawal A, Ibrahim El-Desoky S, Moustafa Moataz A M, El-Zayat Ayatollah S
Department of Microbiology, Faculty of Agriculture, Cairo University, Giza 12613, Egypt.
Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza 12613, Egypt.
Biology (Basel). 2024 Dec 17;13(12):1057. doi: 10.3390/biology13121057.
The widespread use of pesticides to manage has led to significant challenges. This insect has developed resistance to 47 active insecticide ingredients. Therefore, endophytic entomopathogenic bacteria have been explored as an alternative pest management strategy, offering the potential to reduce reliance on chemical pesticides. The current study aims to evaluate the colonization potential of indigenous marine strains as endophytes in maize plants and to assess their insecticidal activity against . Four inoculation methods-foliar application, seed treatment, soil drenching, and a combination of all three-were used to establish the strains as endophytes in maize plants. Our results showed that the promising native strains exhibited both antibacterial and insecticidal effects against neonates under laboratory conditions. Foliar application of sp. Esh39 caused the highest mortality rate (65%), followed by R39 (60%). However, this method did not significantly enhance plant height or chlorophyll content. The potential of these native strains warrants further investigation to improve biological control via endophytic mediation. Our findings provide valuable insights into the bacterial diversity and functionality of mangrove ecosystems and pave the way for innovative, sustainable insect management strategies.
广泛使用杀虫剂来控制害虫已带来重大挑战。这种昆虫已对47种活性杀虫剂成分产生抗性。因此，内生昆虫病原细菌已被探索作为一种替代害虫管理策略，有望减少对化学杀虫剂的依赖。当前研究旨在评估本地海洋菌株作为内生菌在玉米植株中的定殖潜力，并评估它们对[害虫名称未给出]的杀虫活性。采用四种接种方法——叶面喷施、种子处理、土壤浇灌以及这三种方法的组合——来使这些菌株在玉米植株中定殖为内生菌。我们的结果表明，有前景的本地[菌株名称未给出]菌株在实验室条件下对[害虫名称未给出]幼虫表现出抗菌和杀虫作用。叶面喷施[菌株名称未给出]Esh39导致的死亡率最高（65%），其次是[菌株名称未给出]R39（60%）。然而，这种方法并未显著提高株高或叶绿素含量。这些本地[菌株名称未给出]菌株的潜力值得进一步研究，以通过内生介导改善生物防治。我们的研究结果为红树林生态系统的细菌多样性和功能提供了有价值的见解，并为创新的、可持续的昆虫管理策略铺平了道路。
