论文部分内容阅读
腐烂病是我国北部苹果产区的主要病害,在山东省五莲县果树重点栽培区危害甚重。特别是近几年来,果树承包到户,片面追求产量,土肥水管理跟不上,产量变幅很大。因此,每逢大年结果后,因树体消耗过度,树势衰弱,腐烂病急剧上升,危害程度逐年加重。1986年10月,我们进行了一次腐烂病普查,调查了449900株苹果树,其中结果树20万株,腐烂病株13975株,占总株数的3.1％,占结果株数的6.99％。近6年来因腐烂病死亡的就有3743株,占结果树的1.87％。多年来虽采取了一些防治措施,但效果不佳。而1977年春采用重刮皮防治腐烂病的方法,却取得了较好的效果。
Rot disease is the main disease in the apple producing area in northern China, and it is very harmful to key fruit cultivation areas in Wulian County, Shandong Province. Especially in recent years, fruit trees contracted to households, one-sided pursuit of yield, soil and fertilizer water management can not keep up, large yield amplitude. Therefore, every year after the result, due to excessive consumption of trees, tree weakness, decay disease rose sharply, the degree of harm increased year by year. In October 1986, we conducted a survey on rot disease and investigated 449,900 apple trees, of which 200,000 were result trees and 13975 were rotten ones, accounting for 3.1% of the total number of trees and 6.99% of the number of trees affected. In the past six years, there were 3743 deaths due to rot disease, accounting for 1.87% of the results tree. Although some preventive measures have been taken over the years, their results have not been very effective. In the spring of 1977, the method of using heavy scrape to prevent rot disease was achieved good results.