近年来稻曲病在信阳地区相继严重发生,各地对其药剂防治效果的表示方法不统一,有的采用病穗减退率,有的采用穗病粒数减退率。这两种表达法,孰优孰劣,难以分辨。作者基于澄清这一问题的目的,进行了试验探讨,供商榷。一、试验方法试验在药剂防治稻曲病的适期范围内进行。供试水稻品种为特青二号,每亩施15%粉锈宁50克,施药期依次为7月25日、7月30日、8月5日、8月10日、8月15日、8月22日、 In recent years, STDs have occurred in Xinyang area one after another, all over the representation of their drug control effect is not uniform, and some use of disease reduction rate of ear, and some reduce the rate of ear grain reduction. The two expressions, which one is better, it is difficult to distinguish. Based on the purpose of clarifying this issue, the author conducted a trial discussion for discussion. First, the test method Test in the control of rice false smut within the appropriate period. The tested rice varieties were Teqing No.2, with 15% triadimefon 50g per acre. The application periods were July 25, July 30, August 5, August 10, August 15, 8 On the 22nd,