阿月浑子褐斑病防治药剂筛选  

Screening Fungicides Against Leaf Brown Spot on Pistacia

作　　者：杨书宇[1] 苏淑钗[1] 樊桂敏[1] 何敬房[2] 冷平生[2] 

机构地区：[1]北京林业大学省部共建森林培育与保护重点实验室,北京100083 [2]北京农学院园林系,北京102206

出　　处：《北方园艺》2011年第12期17-20,共4页Northern Horticulture

基　　金：国家林业局"948"资助项目(96-4-71-02)

摘　　要：通过离体叶片接种、形态学鉴定和分子鉴定,确定阿月浑子褐斑病病原菌为链格孢(A.alternaria)。并在离体条件下测定并比较了5种常用杀菌剂对该病原菌的抗菌活性。结果表明:苯醚甲环唑对该病菌菌丝生长的抑制活性最高,其EC50为0.924 mg/L,其次是甲基托布津和代森锰锌;百菌清对该病菌分生孢子萌发的抑制活性最高,其EC50为0.272 mg/L,其次是甲基托布津和代森锰锌;多菌灵对病原菌菌丝生长和分生孢子萌发的抑制活性均较低。A.alternaria was identified through pathogenic test,morphological characters and molecular identification.The sensitivities of A.alternaria to 5 fungicides were determined in vitro.The results showed that difenoconazole had relatively higher activity against mycelial growth of A.alternaria than other fungicides,and its 50% effective concentration（EC50）values was 0.924 mg/L,followed by Mancozeb and thiophanate-methyl.Chlorothalonil had the highest negative effect on spore germination of the pathogens test,and its 50 effective concentration values was 0.272 mg/L,followed by Mancozeb and thiophanate-methyl.Carbendazim had the lowest negative effect on both mycelial growth and spore germination.

关 键 词：阿月浑子 褐斑病 链格孢 毒力测定 

分 类 号：S565.9[农业科学—作物学]