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经过三年的试验研究,初步看出我省洛宁县小麦赤霉病的发生与流行受小麦品种和气象要素的制约,而菌源活动情况又受气象要素的影响。首先在小麦品种间虽无免疫类型,但各品种的抗病性差异十分显著;其次在小麦抽穗、扬花、灌浆期(5月1日～20日),(1) 旬平均气温为18. 9～19. 8℃,都是适宜于赤霉菌子囊孢子和分生孢子萌发的温度,对赤霉病发生不是限制气象要素。(2) 旬平均雨量19. 4～48. 0毫米,旬平均相对湿度73～79%,旬平均雨日4天,连阴雨日2～3次,对赤霉病菌孢子萌发和侵染都是极为有利的环境条件,因此,是赤霉病发生流行的决定要素。(3) 旬平均日照时数71. 6～60. 1小时,对小麦生长发育不利,降低了抗病性。
After three years of pilot study, it was initially concluded that the occurrence and prevalence of wheat head blight in Luoning County of our province were restricted by wheat varieties and meteorological factors, and the activity of the bacterial source was affected by meteorological factors. First, although there is no immune type among the wheat varieties, the differences in disease resistance of the varieties are very significant. Secondly, in the wheat heading, flowering and filling stages (May 1 to 20), the average temperature of (1) ten days is 18.9 ~ 19. 8 ℃, are suitable for the temperature of Aspergillus ascospores and conidia germination, the occurrence of the scab does not limit the meteorological elements. (2) average rainfall of 19.4 ~ 48.0 mm, average relative humidity of 73-79% in ten days and average of ten days of rainy day in 4 days, with even 2 or 3 rainy days, which are very significant for spore germination and infection of Fusarium gracile Favorable environmental conditions, therefore, is the decisive element of the prevalence of scab. (3) average daily sunshine hours 71. 6 ~ 60 1 hour, adversely affect the growth and development of wheat, reducing disease resistance.