防治人参锈腐病木霉菌的筛选及防治效果

人参锈腐病是人参的主要病害,应用生物防治技术对人参质量安全保证和人参的可持续种植具有重要意义。通过离体对峙拮抗筛选试验,从种植人参土壤和其他土壤中分离获得的107株木霉菌中筛选出了5株拮抗效果较好的菌株。应用这些筛选到的菌株的厚垣孢子处理人参苗床,人参的出苗率不受影响。播种后1年,5株木霉处理病情指数都在10以下,对照达到40.69,差异极显著,5株木霉防治效果都在75%以上,木霉菌株间防效差异不显著。播种后2年,5株木霉处理病情指数在13左右,对照达到46.84,差异极显著,5株木霉防治效果在67%以上,木霉菌株间防效差异不显著。

Selection of Trichoderma spp.Antagonistic to Cylindrocarpon destructans,Pathogen of Ginseng Root Rot Disease

Cylindrocarpon destructans is one of the most important pathogens of root rot disease of ginseng. Biological control is a potential way for management of the disease. We selected five strains of Trichoderma by confrontation in vitro from 107 strains isolated from ginseng planting and other soils. The chlamydospore preparation of the five strains was applied in ginseng seedbed respectively and seedling rate of ginseng was not affected. After one year of treatment, the disease index of the 5 strain treatments were all below 10, while control was 40.69. After two years of treatment, the disease index of 5 Trichoderma strain treatments was about 13, compared to control 46.84, and the difference between treatment and control was extremely significant level and no differences between 5 strains in statistics. The control effect of 5 strain treatments was over 67%.