INVESTIGATION SOME BIOLOGICAL CHARACTERISTICS OF ACTINOMYCETES ISOLATED ON THE LANDS OF TEA IN THAI NGUYEN

Abstract

From 59 samples of lands of tea in some areas of Thai Nguyen province, 29 strains of antifungy of Actinomycetes have been isolated, rate 49,1%. Strains Actinomycetes TCn.1 and TTr.2 have had abilities for inhibition all four fungy strains experiment and strong ability for fungies that cause brown spot, gray spot diseases on tea leaves. Strains of Actinomycetes TCn.1 and TTr.2 isolated have biological characteristics similar as Streptomyces spp.. Optimum NaCl concentration for growing of TCn.1  and TTr.2  are 1 and 0.5% respectively, when NaCl concentration was higher from 7,0% above then all two strains did not growth; they have had growth abilities in temperature from 20-40^oC and the suitable temperature for good growth ware from 30-35^oC.