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小麦纹枯病是南阳地区近年来新发展起来的一种病害,1983年首次记录,发生面积38万亩,1987年扩大到126.5万亩,1991年达444.5万亩,重病田病茎率100%,平均减产20%以上,成为影响本地小麦高产稳产的重要因素之一。1984年以来,我们对小麦纹枯病的发生消长规律及测报技术进行了一些研究。一、小麦纹枯病发生消长规律从1987年秋开始,选择本地主要品种宛7107三块,进行病情系统调查。方法是小麦出苗后3天调查一次,见病株后定点,每隔10天调查查一次,每块田5点取样,每样点50株,3月1日后每点改为30茎,记载
Wheat sheath blight is a disease newly developed in recent years in Nanyang area. It was recorded for the first time in 1983 with an area of 380,000 mu. It expanded to 1,265,000 mu in 1987 and 4,445,000 mu in 1991, , An average reduction of more than 20%, has become one of the important factors affecting the high and stable yield of local wheat. Since 1984, we have carried out some researches on the rule of the occurrence and decline of wheat sheath blight. First, the occurrence and decline of wheat sheath blight Law from the fall of 1987, select the main local species Wan 7107 three, the disease system investigation. Method is to investigate the wheat 3 days after emergence, see the disease after the fixed-point survey once every 10 days investigation, each field sampling at 5 o’clock, each sample point 50, March 1 after each point to 30 stems, records