不同杀菌剂防治小麦赤霉病试验研究初报

为筛选出安全高效的小麦赤霉病防治药剂品种,设置4种新型杀菌剂对小麦赤霉病的田间防效试验。杀菌剂应用20%三唑酮乳油、70%戊唑醇水分散粒剂、50%多菌灵可湿性粉剂、25%氰烯菊酯悬浮剂,在相同管理水平下,与清水防治处理的小麦对照组进行大区对比示范。结果表明：在相同的管理条件下,清水处理的产量532.0 kg/667 m₂；参试的4种药剂中,产量最高的是25%氰烯菊酯悬浮剂,产量为564.0 kg/667 m₂,比清水处理的增产32.0 kg,增产率6.0%；其次是50%多菌灵可湿性粉剂,产量为544.0 kg/667 m₂,比清水处理的增产12.0 kg,增产率2.3%；20%三唑酮乳油、70%戊唑醇水分散粒剂则与对照组差异不显著。综上可以看出,小麦赤霉病选用25%氰烯菊酯悬浮剂的防治效果最好,在抽穗至扬花期喷施能较好地预防赤霉病的发生,从而获得较高的产量。

Different Fungicides Against Wheat Scab

In order to screen out the safe and efficient fungicides for wheat scab control, a field experiment of 4 kinds of new fungicides on wheat scab was set up, including 20% triadimefon EC, 70% tebuconazole WG, 50% carbendazim WP, 25% beta suspension. At the same management level, a large area comparative demonstration was conducted in compare with the control group treated with water. Results showed that the yield of water treatment was 7976.01 kg/hm2. Among the 4 treatments, the highest yield was 8455.77 kg/hm2 with 25% beta suspension 1500 mL/hm2, increased by 479.76 kg compared with the control with an increasing rate of 6%. The second-highest yield was 8155.92 kg/hm2 with 50% carbendazim WP 1500 mL/hm2, increased by179.91 kg compared with the control with an increasing rate of 2.3%. 20% Triadimefon EC 750 mL/hm2 and 70% tebuconazole WG 150 mL/hm2 had no significant difference from the control group. It was concluded that 25% beta suspension 1500 mL/hm2 had the best control effect, in the spraying heading to flowering stage, it could effectively prevent the occurrence of scab for a higher yield.