作　　者： ; ; ; ; ;

机构地区： 甘肃农业大学草业学院草业生态系统教育部重点实验室

出　　处： 《农药》 2013年第8期599-601,623,共4页

摘　　要： [目的]明确引起甘肃省黄芪白粉病的病原菌种类,并筛选出高效低毒的药剂用于田间防治。[方法]通过田间调查和形态学方法进行病原鉴定;选用5种高效低毒的杀菌剂进行田间药效试验。[结果]甘肃省黄芪白粉病病原为真菌界子囊菌门束丝壳属黄芪束丝壳Trichocladia astragali(DC.)Neger。田间药效试验结果表明:供试的5种杀菌剂中75%肟菌酯.戊唑醇WG 0.25 mg/L、10%苯醚甲环唑WG 1.44 mg/L和50%硫磺.三唑酮SC 1.26 mg/L效果较好,间隔8 d连续用药2次,防效达75%以上。[结论]75%肟菌酯.戊唑醇WG、10%苯醚甲环唑WG和50%硫磺.三唑酮SC是防治甘肃省黄芪白粉病的首选药剂,可在生产中交替使用。 [Aims] This study aims to identify the pathogen of powdery mildew of Astragalus mcmbranaceus in Gansu province and find efficient fungicides. [Methods] Pathogens were identified through field survey and morphological method. Five efficient fungicides with high efficacy and low toxicity were selected to carried out field trials. [Results] The pathogen was identified as Trichocladia astragali （DC.） Neger. Sensitivity testing for fungicides showed that trifloxystrobin-tebuconazole 75% WG at 0.25 mg/L, difenoconazole 10% WG at 1.44 mg/L, sulfur, triadimefon 50% SC at 1.26 mg/L provide significant control effect, after 2 times treatment at 8 d intervals, the control effect were all above 75%. [Conclusions] Trifloxystrobin＂ tebuconazole 75% WG, difenoconazole 10% WG, sulfur, triadimefon 50% SC could be used in rotation to control powdery mildew on A. membranaceus.

关 键 词： 黄芪 白粉病 病原鉴定 药剂防治

领　　域： [农业科学] [农业科学]