摘要
[目的]探究25%腈菌唑乳油对水稻纹枯病和稻曲病的防治效果。[方法]采用叶面喷雾法试验25%腈菌唑乳油对水稻纹枯病和稻曲病的田间防效。[结果]25%腈菌唑乳油54~72 g a.i./hm2在早稻分蘖盛期施药1次,药后20 d对纹枯病的防效均在57%以上;在晚稻分蘖盛期和孕穗期施药2次,第2次药后12 d对纹枯病的防效均在60%以上,与对照药剂240 g/L噻呋酰胺悬浮剂72 g a.i./hm2处理无显著差异,且对稻曲病具有良好的兼治效果,对稻曲病的病指防效均在73%以上。[结论]腈菌唑适用于水稻纹枯病和稻曲病的防治。
[Aims] The paper aims to evaluate the efficacy of myclobutanil 25% EC against rice sheath blight and rice false smut. [Methods] The efficacy of myclobutanil 25% EC against rice sheath blight and rice false smut was tested in paddy field by method of foliar spray. [Results] The results indicated that the efficacy of myclobutanil 25% EC with the dosages of 54-72 g a.i./ha against rice sheath blight was over 57% at 20 days after treatment by spraying one time during peak stage of early rice tillering, over 60% at 12 days after the second treatment by spraying two times during peak stage of late rice tillering and booting stage, there was no significantly difference to compare with the efficacy of thifluzamide 240 g/L SC with the dosages of 72 g a.i./ha, and its efficacy of disease index against rice false smut was over 73% simultaneously. [Conclusions] Myclobutanil is suitable for controlling rice sheath blight and false smut.
出处
《农药》
CAS
CSCD
北大核心
2016年第2期141-142,149,共3页
Agrochemicals
基金
国家科技支撑计划课题(2012BAD14B14和2011BAD16B04)
关键词
水稻
纹枯病
稻曲病
25%腈菌唑乳油
防效
rice
rice sheath blight
rice false smut
myclobutanil 25% EC
efficacy
