首页|Influence of entomopathogenic nematodes, symbiotic bacteria and ascarosides on the dispersal behaviour of Meloidogyneincognita

Influence of entomopathogenic nematodes, symbiotic bacteria and ascarosides on the dispersal behaviour of Meloidogyneincognita

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Dispersal is an important behaviour for nematodes. Entomopathogenic nematodes (EPN) are able to regulate plant-parasitic nematodes in the field. However, the mechanism for the interactions between two types of nematodes is not clearly known. The effects of 12 synthesised ascarosides, three EPN species (Steinernema carpocapsae All, Heterorhabditis bacteriophora H06 and H. indica LN2), and 15 symbiotic bacterial isolates from EPN on the dispersal of Meloidogyne incognita were investigated. The resultsrevealed that M. incognita juveniles were repelled, to various degrees, by most of the tested ascarosides (especially ascr#9), three species of EPN, and by bacterial isolates (especially TT01 from H. bacteriophora TT01 and H06 from H. bacteriophora H06),compared with the controls. Ascr#9 was abundant in M. incognita juvenile-conditioned supernatant. This provides useful cues for elucidating the interaction mechanism between two nematode groups and establishing alternative techniques for the safe and effective control of root-knot nematodes.

dispersal behaviourHeterorhabditis bacteriophoraHeterorhabditis indicanematode interactionroot-knot nematodeSteinernema carpocapsae.

Li Cao、Zhihua Huang、Kang Dai

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Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, Guangzhou 510260, P.R.China

Yuxi Branch of Yunnan Tobacco Company, Engineering Center for Biological Control of Diseases and Pests in the

Academy of Animal Husbandly and Veterinaiy Sciences, Qinghai University, Xining 810016, P.R. China

2022

Nematology

Nematology

SCI
ISSN：1388-5545
年,卷(期)：2022.24(Pt.9)
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