摘要
[目的]明确金边富贵竹黑腐病病原菌种类,筛选出对该病害有防治作用的杀菌剂。[方法]采集具有典型症状的病害标本,根据柯赫氏法则分离病原物,在显微镜下观察病原物形态特征;分别测试2种不同浓度下的9种供试杀菌剂对该病原菌的抑制作用。[结果]引起金边富贵竹黑腐病的病原为半知菌亚门曲霉属的黑曲霉(Aspergillus nigerN.Tiegh)。杀菌剂甲基托布津、恶霉灵、代森锰锌、维鲜、烯酰吗啉、福.福锌等对该菌菌丝生长有较强的抑制作用,有效浓度为500 mg/L时,抑菌率为100%。人工接种试验表明,有效浓度为1 000 mg/L的维鲜或烯酰吗啉溶液喷施叶片防治效果为100%。[结论]防治金边富贵竹黑腐病推荐选用50%维鲜乳油或69%烯酰吗啉可湿性粉剂。
[Objective] The research aimed to determine the species of pathogen caused the black-rot disease in Dracaena sanderiana cv.Golden edge,and to screen the effective fungicides to control the disease.[Method]Disease samples with typical symptoms were collected to isolate the pathogen based on Koch＇s rule,and the morphological characteristics of the pathogen was observed under microscope.The inhibition effect of 9 different fungicides with two different concentrations against the pathogen was determined.[Result]The black-rot disease of Dracaena sanderiana cv.Golden edge was caused by Aspergillus niger N.Tiegh.Thiophanate-methyl,Hymexazol,Mancozeb,Viziam,Dimethomorph and Fuklasin had strong inhibition effects on the mycelia growth of A.niger.When the concentration of the above fungicides was 500 mg/L,the inhibitory rate against A.niger was 100%.Artificial inoculation test showed that when the solutions of Viziam and Dimethomorph with the effective concentration of 1 000 mg/L were sprayed on the leaves,the control effect was 100%.[Conclusion]50% Viziam and 69% Dimethomorph were recommended to select for control the black-rot disease of Dracaena sanderiana cv.Golden edge.
出处
《安徽农业科学》
CAS
北大核心
2011年第6期3351-3353,共3页
Journal of Anhui Agricultural Sciences
关键词
金边富贵竹
黑腐病
黑曲霉
Dracaena sanderiana cv.Golden edge
Black-rot disease
Aspergillus niger N.Tiegh
