Screening bio-control actinomycetes to control pepper phytophthora blight and the impact of microbial population of pepper's rhizosphere

In order to gain the effective value of bio-control agents of actinomycetes to control pepper phytophthora blight,108 strains of antagonism actinomycetes against Phytophthora capsici were tested for disease control and promotion value under green house condition,and the effect of the microbes quantities of pepper's rhizosphere and soil was studied after inoculated antagonism actinomycetes.The result showed that 2 strains(0108 and 0110) were screened out via sterile soil and natural soil in pot experiments which had better control effect to pepper phytophthora blight.Their relative control efficiency was 75% and 81%,respectively,in the 14 d.and were 65% and 56%,respectively,in the 21 d after inoculated strain 0108 and 0110.They both obviously impacted the soil microorganism population to control the development and reproduction of Phytophthora capsici in different part of pepper roots,reduce infection of ytophthora capsic to the pepper roots,and promote the growth of pepper roots.