Screening of Biocontrol Fungi against Sclerotia of Villosiclava virens and Their Mechanisms

doi:10.16409/j.cnki.2095-039x.2016.02.018

Abstract

Abstract: Sclerotia of Villosiclava virens, the pathogen of rice false smut, can overwinter and germinate in the next year to produce ascospores as the primary inocula of rice, so the measures decreasing the sclerotial number in paddy field will be practically useful in control of the disease. We screened sclerotium-degrading fungi against V. virens from paddy field soil, the sclerotium-attached fungi, and the fungi from Tibetan plateau. Tests indicated that Bionectria ochroleuca, Gliomastix polychroma, Aspergillus fumigates, Penicillium oxalicum, Gliocladium roseum, and Myrothecium verrucaria could degrade completely the sclerotia within 30-70 d. Ultrastructural examinations showed that the degradation mechanisms included myco-parasitism and saprophytic modes, respectively. Two of the fungi spreading in paddy field in the spring could decrease the false smut balls by 33.9% and 48.6%, respectively.

Key words: Villosiclava virens, rice false smut, biocontrol agent, sclerotium

CLC Number:

S476

LI Danyang, DENG Qide, YONG Mingli, WANG Hua, LAI Chaohui, CHEN Hongming, HE Wenmiao, HU Dongwei. Screening of Biocontrol Fungi against Sclerotia of Villosiclava virens and Their Mechanisms[J]. journal1, DOI: 10.16409/j.cnki.2095-039x.2016.02.018.

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