小麦、油菜是我省的主要小春作物,病虫种类多,危害严重。特别是近年来,小麦赤霉病大发生频率增加,白粉病发生面扩大,条锈病重新台头,纹枯病、麦蚜、油菜菌核病危害加重,已成为我省小春粮油增产的严重障碍。为此,春后应大力抓好以下防治关键技术。一、小麦赤霉病小麦抽穗扬花期,如气温在15℃以上,并有连续3天以上阴雨,赤霉病就会流行。应根据当地气象预报,以下湿田、两季田、免耕田、低洼潮湿田、水厢小麦等为重点;掌握扬花初期(扬花株率在10％左右)亩用50％多菌灵可湿性粉剂100克,或70％托布津可湿性粉剂75—100％克,兑水50—75公斤喷雾,或兑水7.5—10公斤低量喷雾。如病穗出现早,病情发展快,未来又有闷热多雨天气,应间隔7天再喷药一次。二、小麦白粉病以感病品种、播种偏早、生长茂密、低湿荫蔽的 Wheat, rapeseed is the main small spring crop in our province, many pests and diseases, serious harm. Especially in recent years, the frequency of occurrence of wheat head blight increased, the incidence of powdery mildew increased, the re-emergence of stripe rust, sheath blight, wheat aphid and rape scion became more and more serious, which became a serious obstacle to the increase of small spring grain oil in our province . To this end, the spring should be vigorously grasp the following key technologies. First, the wheat heading stage flowering wheat scab, such as the temperature above 15 ℃, and more than 3 consecutive days of overcast, scab will prevail. Should focus on the following meteorological forecasts, the following wet fields, two fields, no-till fields, low-lying wetlands, water cabins; grasp the early flowering (flowering plant rate of about 10%) mu 50% carbendazim wettable powder 100 grams, or 70% Thiophanate wettable powder 75-100% grams, watered 50-75 kg spray, or diluted with 7.5-10 kg spray. If disease panicle appears early, the disease develops fast, there will be hot and rainy weather in the future, should be sprayed once again within 7 days. Second, wheat powdery mildew To susceptible varieties, sowing early, growing dense, low humidity shade