Control mechanism of Chaetomium spp and its biological control of Citrus root rot in pot and field experiments in Vietnam
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Abstract
Chaetoglobosin-C produced from Chaetoimium globosum gave significantly inhibited colony, sporangia, and oospores growth of Phythothora parasitica causing root rot of citrus which the ED50 values of 4.0, 35.4 and 125.7 ppm respectively. The research finding in pot experiment showed that Chaetomium treatment at soil pH 3,4,5,6 and 7 gave highly significant better reduction the disease incidence than the metalaxyl chemical fungicide and non-treated control. Result in the field trial revealed that the disease index of cturs root rot caused by P. parasitica in Chaetomium biofungicide treatment was not significantly differed from Metalaxyl chemical fungicide when compated to the non-treated control. Chaetomium biofungicide reduced disease of 64 % and Metalaxyly chemical fungicide reduced the disease of 61.3 %. However, Chaetomium biofungicide treatment was also not significantly differed from Metalaxyl chemical fungicide in term of yield.
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References
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