品种、种植年限等因子对苜蓿白粉病和霜霉病发病影响的初步研究

通过对新疆呼图壁小海子地区不同品种,不同种植年限的苜蓿制种田和打草田进行大田定期定点调查苜蓿白粉病和霜霉病发生动态,初步对比分析了这几个因子与病害发生的关系.结果表明:种植一年的新疆大叶苜蓿前期较感霜霉病,而后期则表现与种植三年的新疆大叶对苜蓿霜霉病的抗病性没有明显差异;新牧1号与新疆大叶间抗病性差异显著;作为打草田,相同或不同品种此两种病害的发生并不因种植年限增加而明显加重.

Preliminary Research on Influence of Variety, Planting Term,etc.on Alfalfa Powdery Mildew and Downy Mildew

The investigation was carried out on alfalfa powdery mildew and downy mildew in alfalfa field at Hutubi,Xinjiang.The relationship between these factors and the development of disease was contrasted and analyzed.The results indicated that Xinjiang Daye planted for one year was susceptible in the front periont,but in the post period,there was not remarkable difference of resistance to downy mildew between Xinjiang Daye planted for three years and Xinjiang Daye planted for one year.There was significant difference of resistance to the disease between Xinmu 1 and Xinjiang Daye.In fact,the incidence of the above two diseases was not restricted by planting term.