Pathogenicity of Steinernema carpocapsae ALL Entomopathogenic Nematodes and Their Symbiotic Bacteria as a Biological Control Agent on Red Palm Weevil
文献类型： 外文期刊
作者： Lv, Chaojun 1 ; Meng, Taigao 2 ; Zhong, Baozhu 1 ; Shang, Zhongqiu 2 ; Li, Chaoxu 1 ; Zahra, Abdullah A. 3 ; Abdelrahman, Talat M. 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Coconut Res Inst, 496 Wenqing Ave, Wenchang 571339, Peoples R China
2.Yunnan Agr Univ, Coll Trop Crops, Puer 665099, Peoples R China
3.Al Azhar Univ, Fac Agr, Plant Protect Dept, Cairo 11884, Egypt
4.Al Azhar Univ, Fac Agr, Plant Protect Dept, Assiut 71524, Egypt
关键词：
期刊名称：MICROORGANISMS （ 影响因子：4.2； 五年影响因子：4.6 ）
ISSN：
年卷期： 2025 年 13 卷 5 期
页码：
收录情况： SCI
摘要： Insect-specific pathogens present a sustainable alternative to pesticides for managing the red palm weevil (RPW). This study assessed the efficacy of Steinernema carpocapsae ALL nematodes and their symbiotic bacteria against the third-instar larvae and adults of RPW under laboratory conditions. The symbiotic bacteria were isolated, morphologically characterized, and genetically identified. The results indicated that the mortality rates of RPW larvae treated with S. carpocapsae exceeded 50% in all treatments at 120 h, reaching 93.33% at a concentration of 250 IJs/mL. The morphology of isolated symbiotic bacterium from S. carpocapsae on NBTA medium exhibited a light green color with a glossy surface, a raised center, and a mucilaginous texture. A novel strain of symbiotic bacterium was identified and named as LZ-G7. The bacteria toxicity on RPW adults showed a notable mortality rate of 66.67% at 48 h after feeding with concentration of 10 x 107 CFU/mL. The mortality rate of the third-instar larvae of RPW reached 83.33% after feeding with 0.30 x 108 CFU/g at 96 h and 93.33% after injection into blood cavity with 8 x 106 CFU at 48 h. These results suggest that S. carpocapsae and a novel symbiotic bacterium strain exhibit strong virulence against RPW and have the potential to serve as effective biological control agents in integrated pest management strategies.
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