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采用稀释平板法从全省各地不同类型的土壤中共分离到放线菌４８８５株。以棉花立枯病菌（Ｒｈｉｚｏｃｔｏｎｉａｓｏｌａｎｉ）为指示菌，测定固体培养基平板生长的放线菌的抑菌作用，获拮抗菌株６２４支，占１２．７７％，其中５３支菌株表现出较强的抑菌作用。上述６２４支菌株发酵液拮抗作用的测定表明，有４５支菌株对Ｒ．ｓｏｌａｎｉ有抑制作用，占７．２１％，其中有１２支菌株表现出较的抑制作用。同时测定了这１２支菌株对棉花炭疽病菌（Ｃｏｌｌｅｃｔｏｔｒｉｃｈｕｍｇｏｓｓｙｐｉｉ）、棉花枯萎病菌（Ｆｕｓａｒｉｕｍｏｘｙｓｐｏｒｕｍ）的抑制作用。盆栽试验表明有５个处理（喷５个菌株的发酵液）的棉苗死亡率比对照降低６．７８～１５．７５％，经鉴定，这５支菌株均匀为链霉菌属（Ｓｔｒｅｐｔｏｍｇｃｅｓ）的不同类群。文未对今后的研究进行了阐述。
4885 actinomycetes were isolated from different types of soils around the province by dilution plate method. Taking Rhizoctonia solani as indicator, the antibacterial activity of actinomycetes grown on solid medium was determined. 624 strains were antagonistic, accounting for 12.77%. 53 of them showed strong antibacterial activity effect. The antagonism of the above 624 strains of fermentation broth showed that there were 45 strains against R. Solani inhibitory effect, accounting for 7.21%, of which 12 strains showed more inhibitory effect. The inhibitory effects of these 12 strains on Colletotrichum gloeosporioides and Fusarium oxysporum were also determined. Pot experiments showed that there were 5 treatments (5 strains of fermentation broth spray) cotton seedling mortality rate decreased by 6.78 ~ 15.75% compared with the control, the five strains were identified as Streptomyces (Streptomgces) different Groups. The text does not elaborate on future research.