对2019年杭州地区水稻恶苗病暴发流行的原因进行了分析。结果表明，稻种带菌率高和对氰烯菌酯产生抗药性是导致其大发生的主要原因。进一步田间试验表明，4.23%甲霜·种菌唑微乳剂400倍液和600倍液、25%咪鲜胺乳油2 000倍液、5%咪鲜胺乳油2 000倍液加25%氰烯菌酯悬浮剂2 000倍混配液浸种48 h对恶苗病的防效较好，显著优于25%氰烯菌酯悬浮剂750倍液和2 000倍液，适合在老（重）病区和对氰烯菌酯抗性较高的地区轮换使用来控制恶苗病的发生为害。
The causes of rice bakanae disease in Hangzhou area in 2019 were analyzed in this study. The results showed that the high strain rate of rice seeds and the resistance to cyanide bacteria ester were the main reasons for its occurrence. Field experiments showed that, 4.23% metalaxyl· ipconazole ME with 400 and 600 times liquid, 25% prochloraz EC 2000 times liquid, 5% prochloraz EC 2000 times liquid plus 25% cyanide ene bacteria ester suspending agent 2000 times mixed soaking seeds for 48 h have better controll efect, significantly better than 25% cyanenide SC 750 times and 2000 times liquid. It is suitable for rotation application in severe and high resistance to cyanide bacteria ester to control the occurrence of bakanae disease.
[1] ZAINUDIN N, RAZAK A A, SALLEH B. Bakanae disease of rice in Malaysia and Indonesia: etiology of the causal agent based on morphological, physiological and pathogenicity characteristics [J]. J Plant Protect Res, 2008, 48（4）: 475-485.
[2] 李海东，方利民，尤希宇，等. 3种药剂浸种对水稻安全性及恶苗病的防治效果[J]. 浙江农业科学，2017，58（12）：2 235-2 238.
[3] 沈丽丽，陈翠芳，陈芳芳，等. 氰烯菌酯等药剂防治水稻恶苗病试验[J]. 浙江农业科学，2016，57（3）： 382-384.
[4] 叶挺云，谢子正，许渭根，等. 2016年浙江省早稻恶苗病发生特点及防控建议[J]. 浙江农业科学，2017，58（3）：449-450.
[5] HOU Y P, QU X P, MAO X W, et al. Resistance mechanism of Fusarium fujikuroi to phenamacril in the field [J]. Pest Manage Sci, 2017, 74（3）: 607-616.
[6] 庞子千，黄国有. 水稻恶苗病发生成因及主要防控技术[J]. 中国稻米，2017，23（3）: 77-78.
[7] 曹梦娇，钟雪明，王晔青，等. 4种药剂对水稻恶苗病的防治效果[J]. 浙江农业科学，2018，59（8）: 1 425-1 426.
[8] ZHENG Z, HOU Y, CAI Y, et al. Whole-genome sequencing reveals that mutations in myosin-5 confer resistance to the fungicide phenamacril in Fusarium graminearum[J]. Scientific Reports, 2015, 5: 8 248.
