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室内保存的玉米小斑病病叶,经过11月,其中的病菌仍有90％存活,经过28个月后病菌全部死亡。室外保存的经过10个月仍有80％的病菌存活,地表保存的经过4个月仍有70％的病菌存活。病斑上的分生孢子,室内的经过18个月失去发芽率,但发芽率很低。许昌夏玉米小斑病始发期为7月20日,普发期为7月25日到8月20日,盛发期为8月20日到9月10日。采用中4叶病情调查法,可以代替其它调查法,节约了时间,提高了工效。用25％7313和50％麦穗宁防治小斑病的效果分别达到75.6％和74％。
Indoor leaves of the preserved leaf spot of corn, after November, of which 90% of the bacteria still survive, after 28 months all the deaths of bacteria. After 10 months of storage, 80% of the germs still survive in the outdoor storage, and 70% of the germs remain in the ground after 4 months of storage. Spores on the lesion, indoor after 18 months lost germination rate, but the germination rate is very low. Xuchang summer maize small spot disease onset is July 20, the generalized period of July 25 to August 20, Sheng period of August 20 to September 10. In 4 leaf disease investigation method, you can replace other survey methods, saving time and improve work efficiency. The effect of preventing and treating leaf spot with 25% 7313 and 50% wheat flour reached 75.6% and 74% respectively.