成县小川镇樱桃树膏药病与产量的调查研究

Investigations on the Plaster Disease for Cherry

甘肃成县小川镇樱桃树膏药病的发病株率为４１．２０％，其中结果树发病率为７２．００％，发病的严重程度为１５．１６％，感病树产量损失率平均为３５．９０％。经回归分析，发病的严重程度呈正态分布，发病的严重程度与损失率之间呈正相关，感病和发病最严重的集中在１５ａ生左右的树上，其产量损失率高达４４．９％～４３．１０％。

The percentage of infecting plaster disease in cheng county in all cherries was 41.2 %, in fruiting trees was 72.0 %. The disease was in regular distribution and directly related to yield loss. The most injured plants were the trees at about 15 years old, thus in plants of 15～20 years old yield loss ratio was between 44.92 % and 43.10 %. The yield loss estimated in all town each year was one million and thirty thousands kg.