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Abstract 276 isolates were obtained from rhizospheric soils of pepper.It was found that 7
potential biocontrol actinomycetes showed good antagonistic effects on Phytophthora capsici
by pairing culture.The inhibition zone diameter ranged from 7.8 mm to 13.0 mm.The result
from the experiment trial at greenhouse showed that CQ21-3 strain could effectively control
the pepper phytophthora blight,the control efficiency reached 73.2 %.The result from
culture filtrate showed that CQ21-3 isolate was effective for inhibiting mycelium growth
and reducing spore germination of P.capsici in certain of concentration.
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