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通过15种植物病原真菌的培养滤液对草坪杂草稗草、反枝苋、蒲公英、车前、苘麻进行种子萌发抑制试验,对其除草活性进行了初步研究。结果表明:玉米小斑病菌、黄瓜黑星病菌的培养滤液对稗草、蒲公英、车前都表现出显著的除草活性;玉米大斑病菌的培养滤液仅对稗草和蒲公英表现显著的除草活性;烟草赤星病菌的培养滤液仅对车前和苘麻表现了显著的除草活性。安全试验表明:烟草赤星病菌的培养滤液对黑麦草和早熟禾种子的萌发、芽和根的生长表现安全;黄瓜黑星病菌的培养滤液仅对黑麦草种子的萌发、芽和根的生长表现安全。
15 kinds of plant pathogenic fungi culture filtrate on lawn weeds barnyard grass, Amaranthus retroflexus, dandelion, car plant, hemp seed germination inhibition tests carried out its herbicidal activity were studied. The results showed that the filtrate of Alternaria solani and Cucumber black spot showed significant herbicidal activities against barnyardgrass, dandelion and car plants. The culture filtrate of S. turcica showed significant herbicidal activity only against barnyardgrass and dandelion. The culture filtrate of R. solani showed significant herbicidal activity only on the car and in flax. Safety tests showed that the culture filtrate of R. solani was safe for germination, buds and roots of ryegrass and bluegrass seedlings; the culture filtrate of scab was only safe for germination, bud and root growth of ryegrass seeds .