Laboratory assessment of entomopathogenic nematode symbiotic bacteria to control maize pest,Ostrinia furnacalis,and fungi diseases,Bipolaris maydis and Curvularia lunata |
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| Affiliation: | 1. Instituto de Química de Araraquara, UNESP—Univ Estadual Paulista, C.P. 355, 14801-970 Araraquara, SP, Brazil;2. Instituto de Química de São Carlos, USP, C.P. 780, 13560-970 São Carlos, SP, Brazil;3. Faculdade de Ciências Farmacêuticas, UNESP—Univ Estadual Paulista, 14801-902 Araraquara, SP, Brazil;1. Department of Bioresource Sciences, Andong National University, Andong 760-749, Republic of Korea;2. Institute of Agricultural Science and Technology, Andong National University, Andong 760-749, Republic of Korea;3. Department of Functional Crop, National Institute of Crop Science, Milyang 627-803, Republic of Korea;4. Greenagrotech, Kyeongsan 712-825, Republic of Korea;1. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China;2. MOA–CABI Joint Laboratory for Bio-safety, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 10093, China |
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| Abstract: | The application of entomopathogenic nematodes (EPN) and their symbiotic bacteria as biological control approaches depend on their lethal parasites to pest and antifungal activities against plant pathogenic fungi. We have collected 23 symbiotic bacterial strains from 23 EPN isolates gathered from different regions of China. In the present study, the insecticidal and antifungal activities of all these bacterial isolates were evaluated in the laboratory. Bioassay results showed that the broth and crude extract of all these 23 EPN symbiotic bacteria strains have, to a certain extent, oral insecticidal activity and/or growth inhibition to the larvae of Ostrinia furnacalis and antifungal activity against Bipolaris maydis and Curvularia lunata. Among these strains, SY5 exhibited highest insecticidal and antifungal activities to O. furnacalis, B. maydis and C. lunata. The adversity resistance of strain SY5 showed that the antifungal activity of the broth was more stable than the insecticidal activity, and the stability of antifungal activity to B. maydis and C. lunata was different. |
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