徐伟松

摘要 [目的]研究试验药剂250 g/L啶氧菌酯悬浮剂经济有效的使用剂量和使用技术。[方法]在田间小区试验条件下，研究不同剂量试验药剂对香蕉叶斑病的防治效果。[结果]2009～2010年田间药效试验表明，250 g/L啶氧菌酯悬浮剂对香蕉叶斑病具有较好防效，稀释1 500倍连续用药3次的叶片末次防效达72%以上，果实末次防效达78%以上。[结论]250 g/L啶氧菌酯悬浮剂是防治香蕉叶斑病较为理想的药剂。

关键词 啶氧菌酯；香蕉叶斑病；防治效果；药效试验

中图分类号 S511 文献标识码 A 文章编号 0517-6611（2014）05-01359-02

Abstract [Objective] The aim of the study was to screen the effective pesticide against banana sigatoka disease in Guangdong， and figure out its agent dose and costeffective use of technology. [Method] Control effect of different doses of the test drug against banana sigatoka disease in field trails in 2009 and 2010 years was studied. [Result] Field efficacy trials showed that from 2009 to 2010， picoxystrobin 250 g/L SC against banana sigatoka disease had better control effect. Using 1∶1 500 for 3 times 250 g/L picoxystrobin SC after 10 days， control effect of the last banana leaves and fruits was above 72%， 78% respectively. [Conclusion] 250 g/L picoxystrobin SC was good and a more ideal fungicide against banana sigatoka disease.

Key words Picoxystrobin； Banana sigatoka disease； Control effect；Field trial

香蕉葉斑病在我国南方香蕉产区发生普遍，包括多种叶部病害，常见的有褐缘灰斑病、灰纹病和煤纹病等。广东省是我国香蕉主产区，年种植面积13.3多万hm2，年产量超过400万t。广东香蕉叶斑病常见有尾孢菌叶斑病、小窦氏霉叶斑病、暗双孢霉叶斑病、弯孢霉叶斑病和叶瘟病等，近20年来香蕉叶斑病主要以尾孢菌叶斑病（Cercosproa musae）发生最普遍，危害最严重。叶斑病造成病株产量减少，果实品质下降，在流行年份，叶片受害面积为20%～40%，严重时达80%以上，减产50%以上[1]，病菌主要以菌丝体在病部或病残留物上越冬，分生孢子借风传播，在香蕉生长季节危害，开始发生于老叶，后逐渐蔓延至上部嫩叶。目前，防治香蕉叶斑病仍以化学药剂防治为主，啶氧菌酯是一种内吸性高效广谱的甲氧基丙烯酸酯类杀菌剂，属于植物线粒体呼吸抑制剂，对苯甲酰胺类、三羧酰胺类和苯并咪唑类杀菌剂产生抗性的病原菌有良好防效[2]，应用前景好。……