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Assessing the effects of water extract of Narcissus tazetta bulb on hatching, mortality, chemotaxis and reproduction of the soybean cyst nematode, Heterodera glycines

In: Nematology
Authors:
Yanfeng Hu Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, P.R. China

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Jia You Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, P.R. China
University of Chinese Academy of Sciences, Beijing, P.R. China

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Chunjie Li Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, P.R. China

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Fengjuan Pan Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, P.R. China

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Congli Wang Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, P.R. China

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Summary

The aim of this study was to examine the impact of water extracts of Narcissus tazetta bulb on hatching, behaviour and mortality of second-stage juveniles (J2) and reproduction of the soybean cyst nematode (SCN; Heterodera glycines) in laboratory and glasshouse assays. Results demonstrated that N. tazetta bulb extracts did not affect hatching but significantly reduced J2 motility and nematode attraction to the soybean root tip, and resulted in considerable nematode mortality relative to the control. J2 exposure to different concentrations of bulb extracts caused 59-93% reduction in nematode reproduction on soybean roots. Compared with the monoculture control, soybean-N. tazetta intercropping in a pot trial reduced SCN reproduction by 37%. In addition, N. tazetta bulb powder as a soil amendment is effective in controlling SCN reproduction. Thus, the results suggest that N. tazetta bulb extract or derived active compounds may be considered as potential natural nematicides against SCN.

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