几种杀菌剂对水稻纹枯病的防治效果

目的]寻求防治水稻纹枯病的有效药剂。方法]在水稻破口期分别施用250 g/L嘧菌酯SC 240 ml/hm2、30%己唑醇SC 225 g/hm2、30%己唑醇SC 225 g/hm2＋250 g/L嘧菌酯SC 225 ml/hm2、75%肟菌酯·戊唑醇WG 150 g/hm2、300 g/L苯醚甲环唑·丙环唑EC 300 ml/hm2、10%井冈霉素A SPX 3600 g/hm2，隔7 d再施药1次，调查几种杀菌剂对水稻纹枯病的防治效果。结果]30%己唑醇SC 225 g/hm2＋250 g/L嘧菌酯SC 225 ml/hm2对水稻纹枯病的防治效果最好，第2次药后14 d的防效为87.53%；其次是30%己唑醇SC 225 g/hm2、300 g/L苯醚甲环唑·丙环唑EC 300 ml/hm2，防治效果分别为79.03%、78.92%；而75%肟菌酯·戊唑醇WG 150 g/hm2、10%井冈霉素A SPX 3600 g/hm2、250 g/L嘧菌酯SC 240 ml/hm2防治效果较差。几种药剂在水稻破口抽穗期用药安全性均较好。结论]30%己唑醇SC 225 g/hm2＋250 g/L嘧菌酯SC 225 ml/hm2可以作为今后防治水稻纹枯病的替代农药，在生产上进一步推广使用。

Control Effect of Several Fungicides Against Rice Sheath Blight

Objective The aim of this study was to search for effective chemicals to control rice sheath blight. Method] 250 g/L Azoxystrobin SC （240 ml/hm2 ） , 30%Hexaconazole SC （225 g/hm2）, 30% Hexa-conazole SC（225 g/hm2）＋250 g/L Azoxys-trobin SC （225 ml/hm2）,75% Trifloxys-trobin·Tebuconazole WG （ 150 g/hm2 ） , 300 g/L Difenoconazole ·Propi-conazole EC （300 ml/hm2）, 10% Jin-gangmycin-SPX （3 600 g/hm2） were sprayed respec-tively in rice breach period, and once ag-ain after 7 days, in or-der to tinvestigate-the control effect of these fungicides ag-ainst rice sheath blight. Result] 30%Hexaconazole SC （225 g/hm2）＋250 g/L A-zoxystrobin SC （225 ml/hm2） had the best control effect against rice sheath blight, and the control effi-ciency was 87.53%on the 14th day after the second spraying. 30%Hexaconazole SC （225 g/hm2） and 300 g/L Difenoconazole·Propiconazole EC （ 300 ml/hm2） had the better control effect a-gainst rice sheath blight, and the control effi-ciencywas 79.03%and 78.92%, respectively. The control ef-fects of 75%Trifloxystrobin· Tebuconazole WG （150 g/hm2）, 10% Jin-gangmycin SPX （3 600 g/hm2） and 250 g/L Azoxystrobin SC （240 ml/hm2）a-gainst rice sheath blight were the worst. These fungic-ides were relatively safe to the rice plants in breach period and heading pe-riod. Conclusion] 30%Hexaconazole SC （225 g/hm2） ＋ 250 g/L Azoxystrobin SC （225 m l/hm2） can be used in the pro-duction as an alternative pestic ide to con-trol rices heath blight in future.