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上海郊区三麦赤菌病是影响夏粮稳产高产的重要因素。本文根据有关研究资料,对赤霉病发生的轻重与气候条件的关系,作了初步分析。本地区常年4月中至5月中,平均气温一般在14～18℃,平均雨日18天,雨量133毫米,多雨年份可达200毫米以上,此时正值三麦抽穗扬花、灌浆乳熟时期。由于这时高温高湿天数多,常为赤霉病主要流行期。据本市奉贤植保站历年资料:元大麦始病期大都发生在4月中下旬,盛发期在4月下旬后期～5月上旬;小麦始病期大都发生在4月下旬～5月上旬,盛发期在5月上中旬。
Three wheat rape disease in suburban Shanghai is an important factor affecting the stable and high yield of summer grain. This article based on the research data, the relationship between the severity of the occurrence of scab and climatic conditions, made a preliminary analysis. In mid-April to mid-May this year, the average temperature is generally 14 ~ 18 ℃, the average rainfall day 18 days, rainfall 133 mm, rainy years up to 200 mm above, at this time when three wheat heading and flowering, milky grouting period. Due to the high number of days when the number of high temperature and humidity, often the main epidemic of scab. According to the city of Fengxian Plant Protection Station calendar year information: most of the malformations of barley occurred in late April, Shengfa period in late April ~ early May; most of the onset of wheat occurred in late April ~ early May, Shengfa period in mid-May on.