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从牡丹园9批64个受病害牡丹样品中分离获得137个分离物,经筛选、纯化、回接试验,依其培养性状和形态特征,将病原菌鉴定为茄腐皮镰孢霉(Fusarium solani)。病原菌以菌丝和分生孢子在根部越冬,5~7月为发病盛期。病害的发生与牡丹重茬、土壤酸碱度等因子密切相关。经室内毒力测定和田间药效试验,筛选出了绿亨1号、绿亨2号和50%多福可湿性粉剂等防治根腐病的有效药剂,在新牡丹园防治效果达90%左右,感病指数控制在5左右,对老牡丹园防治效果80%左右,感病指数控制在10左右。
137 isolates were isolated from 64 samples of Peony Garden from 64 batches of Peony Garden. After screening, purifying, and rewinding, the pathogen was identified as Fusarium solani . Pathogens to mycelium and conidia in the roots of winter, 5 to 7 months of the peak incidence. Occurrence of diseases and peony stubble, soil pH and other factors are closely related. After indoor toxicity test and field efficacy test, the effective agents for controlling root rot such as Green Hang 1, Green Hang 2 and 50% Dofu wettable powder were screened out, and the prevention and cure effect in New Peony Garden reached about 90% , The susceptibility index is controlled at about 5, about 80% of the control effect on the old Peony Garden, and the susceptibility index is controlled at about 10.