摘要
通过３ａ（１９９５～１９９７年）多点调查和试验，分析了影响烟草赤星病发生的主要因子。结果表明，渭北旱塬烟草赤星病始发期为７月上旬，陕北烟区为７月中旬至下旬，陕南为６月下旬至７月上旬，发病期为７～９月份。烟草品种抗病性表现为：中烟９０＞Ｇ８０＞Ｋ３２６＞ＮＣ８９＞Ｇ１４０。适量增加钾肥用量可以提高烟株对赤星病的抗病性。进入７月份以后，降雨量和雨日与赤星病的发生和流行呈正相关关系。
By systematic investigation and experiment of occurrence of tobacco brown spot
disease from 1995￣1997.It was found the starting stage of the tobacco brown spot was in the
first ten days in July at middle Shaanxi, from middle to late of July in North Shaanxi and from
late of June to early of July in South Shaanxi. The disease increased continuously to the end of
harvest, the order of the tobacco variety resistence is Zhongyan90>G80>K326>NC89>G140.
Supply K\-2O fertilizer can increase resistence to brown spot disease.The relationship of
rainfall and occurrence of disease was positive.
出处
《西北农业学报》
CAS
CSCD
1999年第2期42-44,共3页
Acta Agriculturae Boreali-occidentalis Sinica
关键词
烟草
烟草赤星病
病害发生
Tobacco
Tobacco brown spot
Occurrence of disease
