论文部分内容阅读
花生青枯病(Pseudomonas solanacearum E.F.Smith)是六十年代以来,在山东省逐渐蔓延起来的主要病害,面积已达20万亩以上。一般发病率5～10%,重者达50%以上。该病每年6月初始见,6月下旬至7月中旬为发病盛期,累计病株数符合y=de~(-(b/x))曲线。本病的发生与土壤含砂率有密切关系。含砂量越高,发病越重(r=0.8956~*)。在相同土壤中,土壤田间持水量与发病呈负相关(r=-0.905~*)。试验示范证实,采用以抗病良种为主的综合防病措施,是防治本病经济有效的方法,推广面积在3万亩以上。氯化苦处理土壤也有良好的效果。
Peanut bacterial wilt (Pseudomonas solanacearum E.F.Smith) is the main disease spreading gradually in Shandong Province since the 1960s, with an area of over 200,000 mu. The general incidence of 5 to 10%, severe cases of more than 50%. The disease begins in June each year, and from late June to mid July is the peak of disease incidence. The cumulative number of plants accords with the curve of y = de - (- (b / x)). The incidence of this disease is closely related to soil sand content. The higher the sand content, the heavier the incidence (r = 0.8956 ~ *). In the same soil, the field water capacity was negatively correlated with the incidence (r = -0.905 ~ *). Test demonstration confirmed that the use of disease-resistant varieties of comprehensive disease prevention measures is the prevention and treatment of the disease cost-effective method to promote an area of 30000 mus of above. Chloropicrin soil treatment also has good results.