徐淮地区芦笋茎枯病发生规律的研究

Study on Law of Occurrence Asparagus Stem Blight in Xuhuai Region

徐淮地区芦笋茎枯病的年发生过程中有两个峰期，分别在5月下旬至6月上中旬和7月下旬至8月底。两个降雨高峰期中以第二峰期的危害最为严重。在该地区的气候条件下，秋笋生育前期茎枯病的发生部位以茎杆为主，后期以测技为主，并且危害程度还因环境条件的不同而有较大差异。

Stem blight of asparagus have two Peak periods of disease in one year in Xuhuai region. The two Period are just the two Peak nush Period, from the last ten days of May to the first and Second ten days of June and from the firstten days of July to the last ten days of August. The damage of the second Peak pered of disease is especially serions. In the climate of there region, symptom is mainly observed on mother stem in growing earlier Peried of stem in Autumn, but it is mainly mesent on branch stem in later pehod. Significant difference is observed in the leve of drsease amony different environmental conditims.