6种杀菌剂对枇杷灰斑病的室内毒力测定  

Indoor toxicity determination of six fungicides on gray spot of loquat

作　　者：唐靖文 陈春旭[2] 龙友华[2] 王维东[3] 夏忠敏 邵昌余 

机构地区：[1]贵州省修文县猕猴桃产业发展局,贵州修文550200 [2]贵州大学农学院,贵州贵阳550025 [3]贵州大学生命科学学院,贵州贵阳550025 [4]贵州省植保植检站,贵州贵阳550001

出　　处：《中国园艺文摘》2016年第4期51-53,84,共4页Chinese Horticulture Abstracts

基　　金：贵州科技攻关项目"精品水果枇杷病虫绿色防控技术研究及推广应用"[黔科合NY(2012)3059]

摘　　要：为了给枇杷灰斑病田间防治提供理论依据,试验通过对来源于贵州省部分地区枇杷种植园的灰斑病病原菌分离物进行分离、纯化和鉴定,并选用6种杀菌剂进行室内毒力测定。结果表明,贵州地区枇把灰斑病致病菌为拟盘多毛孢[Pestalotiopsis eriobotryfolia(Guba)];6种杀菌剂对批把灰斑病菌的菌丝生长的抑制率与浓度呈正相关,其中80%戊唑醇WDG的抑菌效果最好,EC50为5.69μg/ml(r=0.9937),其次分别为80%丙森锌WP、40%腈菌唑SC、325 g/L苯甲嘧菌酯SC、400 g/L氟硅唑EC和500 g/L苯甲丙环唑EC。The pathogenic bacteria of loquat gray spot was separated, purified and identified. Then the toxicity and field control effects of 6 bactericides against loquat gray spot were tested by the indoor fungicide test to provide a reference for prevention and cure of loquat gray spot. The results showed that pathogenic bacterium was Pestalotiopsis eriobotryfolia（Guba） in Guizhou. All these fungicides could inhibit the mycelial growth to a varying extent in a dosage dependent manner. Among these 6 fungicides, 80% Tebuconazole WDC had the best effect [EC50 value： 5.69 μg/ml（r=0.9937）], and then followed by 80% Propineb WP, 40% Myclobutanil SC, 325 g/L Difenoconazole·Azoxystrobin SC, 400 g/L Flusilazole EC and 500 g/L Benzoyl Propiconazole EC.

关 键 词：灰斑病 病原鉴定 室内毒力测定 

分 类 号：S436.5[农业科学—农业昆虫与害虫防治]