Shreyansh Srivastava Ashok K. Chaubey


National loss of Rs. 21,068.73 million has been estimated due to plant-parasitic nematodes in India. Among plant-parasitic nematodes, one of the major nematodes, root-knot nematodes (RKNs), are well-known diseases causing major losses in vegetable crops. An in vitro experiment was conducted to evaluate the nematicidal activities of the cell-free culture filtrate (CFCF) of entomopathogenic bacteria Photorhabdus spp. and Xenorhabdus spp. isolated from entomopathogenic nematodes Heterorhabditis indica (DH3) and Steinernema abbasi (CS-39), respectively. The applied doses were 90, 50, 25 and 10% CFCFs. The experiment was performed on the plant-parasitic nematode Meloidogyne incognita, and the % mortalities were determined at 6, 12, 24 and 48 hr intervals. The results of the present study revealed that 100% mortality was achieved after 48 hrs with a 10% filtrate of H. indica isolate DH3, while no significant result was achieved even after 48 hrs and at 90% CFCF of isolate CS39. Therefore, 10% CFCFs may be recommended for application in root-knot nematode-infected fields for the control.


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Cell-free culture filtrate (CFCF), Meloidogyne incognita, Photorhabdus spp., Root-knot nematode, Xenorhabdus spp.

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Srivastava, S. ., & Chaubey, A. K. . (2022). In vitro study on the nematicidal activity of entomopathogenic bacteria against the root knot nematode Meloidogyne incognita. Journal of Applied and Natural Science, 14(1), 1–8. https://doi.org/10.31018/jans.v14i1.3181
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