几种药剂对玉米大斑病的田间防治效果

Field Control Effects of Several Reagents for Northern Leaf Blight of Maize

为筛选防治玉米大斑病适宜药剂,通过田间试验比较了吡唑醚菌酯、氟环唑等4种药剂对玉米大斑病的防治效果。结果表明:按有效成分计吡唑醚菌酯100g·hm-2、氟环唑135g·hm-2、丙环唑168.8g·hm-2及代森铵675g·hm-2三次药后对玉米大斑病的防效分别为82.1%、81.2%、82.9%和77.3%,对玉米安全、无药害;综合保产因素,生产上防治玉米大斑病宜采用含吡唑醚菌酯、氟环唑、丙环唑成分的药剂为佳,建议在发病前或发病初期及早用药防治。

Aiming to screen a suitable reagent to control the northern leaf blight of maize, the control effects of Pyrazole Kresoxim,Epoxiconazole and other two kinds of reagents were compared through field experiments. The results showed that no phytotoxieity was observed to maize after applying Pyrazole Kresoxim 100 g· hm^-2, Epoxiconazole 135 g·hm^-2 , Propiconazole 168. 8 g·hm^-2 and Amobam 675 g· hm^-2 according to the effective component, the control effects were 82.1%,81.2%, 82.9 % and 77.3% respectively for three times ; Considering the production factors, the reagents mainly with the component of Pyrazole Kresoxim, Epoxiconazole or Propiconazole should be suggested,and better effect would be achieved before the onset or the initial infection stage for earlv prevention and control.