Bioassay fo Tricholderma harzianum Strains for their antagonism against Rhizoctonia solani the Causal Agent of Rice Sheath Blight

摘要

Rice sheath blight caused by rhizoctinia solani is one of the most important disease in china and in south east Asis. Since there is no resistant cultivasr available, the practical control of the disease is acheived only through repeated application of fungicides. COncerning the fungicide resistance and the harmful effect on nontarget organisms, biological control will be a considrable alternation. The purpose of this study was to evaluate the potential of Trichoderma harzianum strains ot be used as biocontrol agents against rice sheath blight.