茶树炭疽病防治田间药效试验  

Field Efficacy Test of Different Chemicals for Controlling Tea Anthracnose

作　　者：石媛 王昆 田家顺 SHI Yuan;WANG Kun;TIAN Jia-shun(Jishou Municipal Bureau of Agriculture and Rural Affairs,Jishou 416000,PRC;Hunan Heyi Crop Science Co.,Ltd.,Changsha 410125,PRC)

机构地区：[1]吉首市农业农村局,湖南吉首416000 [2]湖南禾益作物科学有限公司,湖南长沙410125

出　　处：《湖南农业科学》2023年第4期73-75,共3页Hunan Agricultural Sciences

摘　　要：为了筛选出防治茶树炭疽病的高效、安全、低毒和环境友好的防控药剂,选用5种化学杀菌剂和4种生物杀菌剂开展了茶树炭疽病防治的田间药效试验。结果表明:供试杀菌剂对茶树炭疽病均具有一定的防治效果,5种化学杀菌剂末次施药后7和14 d的防治效果分别为67.0%~82.6%和65.1%~83.5%,4种生物杀菌剂末次施药后7和14 d的防治效果分别为42.2%~68.6%和36.4%~67.3%;5种化学杀菌剂中以处理1(25%吡唑醚菌酯悬浮剂1 500倍液)对茶树炭疽病的防治效果最好,末次施药后7和14 d的防治效果分别为82.6%和83.5%,显著高于其他处理;其次是处理4(10%苯醚甲环唑水分散粒剂1 250倍液)和处理5(22.5%啶氧菌酯悬浮剂1 500倍液),末次施药后14 d的防治效果分别为76.8%和79.7%,对茶树炭疽病的防治效果显著高于除处理1以外的其他处理;4个生物杀菌剂中以处理9(10%多抗霉素可湿性粉剂90 g/667m2)对茶树炭疽病的防治效果最好,末次施药后7和14 d的防治效果分别为68.6%和67.3%,与化学杀菌剂处理75%百菌清可湿性粉剂700倍液(处理2)和80%代森锌可湿性粉剂600倍液(处理3)的防治效果无显著性差异。Anthracnose is a common leaf disease on tea brushes,which not only reduces tea yield,but also seriously affects tea quality and economic benefits.In order to screen high-efficiency,safe,low-toxicity and environment-friendly agents for the control of tea anthracnose,the field efficacy test of five chemical fungicides and four biological fungicides was carried out.The results showed that the tested fungicides all had certain control effects on tea anthracnose;in detail,the five chemical fungicides reached 67.0%-82.6%of control effects 7 days after the last application and 65.1%-83.5%14 days after the last application,while the four biological fungicides reached 42.2%-68.6%and 36.4%-67.3%,respectively.Among the five chemical fungicides,treatment 1(1500 times solution of pyraclostrobin 25%SC)had the best control effect on tea anthracnose,which was 82.6%and 83.5%,respectively 7 and 14 days after the last application,significantly higher than the other treatments;treatment 4(1250 times solution of difenoconazole 10%WG)and treatment 5(1500 times solution of picoxystrobin 22.5%SC)ranked the second with control effects of 76.8%and 79.7%,respectively 14 days after the last application,which were significantly higher than the other treatments except treatment 1.Among the four biological fungicides,treatment 9(1350 g/hm2 of polyoxamycin 10%WP)had the best control effect on tea anthracnose,reaching 68.6%and 67.3%,respectively 7 and 14 days after the last application,which had no significant differences compared with treatment 2(700 times solution of chlorothalonil 75%WP)and treatment 3(600 times solution of zineb 80%WP).

关 键 词：茶树 炭疽病 杀菌剂 安全性 防治效果 

分 类 号：S435.711[农业科学—农业昆虫与害虫防治]