Nematicidal activity using a pure culture of Syncephalastrum racemosum was studied. The results showed that the metabolites of S. racemosum have pretty high nematicidal activity. The nematicidal principles were solube in water and had high thermal stability. The major acid metabolites extracted from cultures of S. racemosum identified from HPLC were oxalic acid dihydrate and tartaric acid. Soil application with culture filtrate of S. racemosum significantly (P<0.05) reduced nematode population densities and subsequent root-knot development in tomato compared with the controls.
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Jianhua et al. (2008) studied this question.
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