【摘要】 用平板表面萌发法测定化学除草剂对尖角突脐孢菌菌株X27分生孢子萌发的影响,在温室研究该菌分生孢子干粉与化学除草剂的相互作用,在田间评价其混剂的除稗效果.结果表明,二氯喹啉酸和苄嘧磺隆对分生孢子的萌发影响不明显,其它除草剂均有不同程度的影响.在温室条件下,菌X27干粉与二氯喹啉酸混用具有明显的增效作用,与敌稗混用具有加成作用;在水田条件下,单用菌X27干粉防除稗草效果差,防效只有60%,而与低量的二氯喹啉酸混用,防效明显提高,达90%以上.更多还原

【Abstract】 This paper studied the impact of several herbicides on the conidium germination of Exserohilum monoceras strain X27 in petri dish,and the synergistic effects of the pathogen and chemical herbicide quinclorac or propanil against Echinochloa crus-galli in greenhouse.The prevention efficiency of the tank-mixture of pathogen and quinclorac was also evaluated in paddy field.The results showed that test herbicides except quinclorac and bensulfulfuron-methyl could inhibit conidium germination and hypha growth to different degree.A significant synergism was observed between the pathogen and quinclorac.Adding quinclorac could obviously increase the prevention efficiency against Echinochloa crus-galli.Under field condition,the single use of pathogen could only control about 60% of the weed,while the efficiency of pathogen-quinclorac mixture could reach 90%.更多还原