6种杀菌剂对5种蓝莓枝枯病原菌的室内毒力测定

摘要

葡萄座腔菌 Botryosphaeria dothidea、棒状拟盘多毛孢 Pestalotiopsis clavispora、乌饭树拟茎点霉 Pho-mopsis vaccinii、尖孢炭疽菌 Colletorichum acutatum、胶孢炭疽菌 Colletotrichum gloeosporioides 5种病原菌是目前引起山东青岛胶南地区蓝莓枝枯病的主要病原菌。本试验采用菌丝生长速率法测定6种杀菌剂的毒力。结果表明，吡唑嘧菌酯、咯菌腈、苯甲·丙环唑对5种病原菌抑制作用较强，EC50值介于0．0035～2．2245 mg·L －1之间，对由该5种病原菌引起的蓝莓枝枯病防效很好。%Botryosphaeria dothidea,Pestalotiopsis clavispora,Phomopsis vaccinii,Colletorichum acuta-tum,Colletotrichum gloeosporioides were 5 main pathogens of blueberry twig dieback in Qingdao Jiaonan area of Shandong Province.The indoor toxicities of 6 fungicides against 5 pathogens were detected by mycelium growth rate method.The results showed that pyraclostrobin,fludioxonil,difenoconazole -propiconazole had rel-atively strong inhibition rate.The EC50 were between 0.0035 ~2.2245 mg·L -1 .The control effects were ex-cellent.