Analysis the Relationship between Sowing Time and Disease,Yield,Quality of Confectionery Sunflower

In this paper we analysed the relationship between the sowing time and the disease and yield of hybrid confectionery sunflower.Most farmers sew confectionery sunflower in the middle to the end of April.The sunflower diseases on that sowing plants were very serious in August,and the yield was very low.The diseases were very little or no disease happened on the plants sowed after the middle of May.Sowing late in a appropriate time can avoid desease and increase the yield and quality obviously.