苹果斑点病发病因子观察及药剂防治试验

Observation on Diseasing Factors of the Apple Alternaria Blotch and Fungicide Experiments on It's Control

1985～1989年对苹果斑点病的发病因子进行了观察,结果表明,该病的发生与降雨量呈正相关(r=0.846),降雨早而多的年份,发病普遍而且严重;苹果品种间以红星、青香蕉较感病,金帅、小国光抗病。药剂防治试验表明,扑海因和波尔多液防效相当,若两者交替使用,防效最佳,可基本控制此病害的发生。

Through observing the disease factors of the apple alternaria blotch in 1958～1989, the disease showed positive correlation with precipitation, r = 0.864. The disease was universal and severe in an early and heavily raining year. Resistances to the disease were different among different apple varieties. Fungicide experiments indicated that Iprodiane and Bordeaux mixtures were both effective to control the disease and the effectiveness would be much greater if the two fungicides were used alternatively.