柑桔膏药病为害枝干,影响植株局部组织的正常生长发育,发生严重时常使病部以上枝条枯死,产量降低。此病在华南地区从4月开始至12月均可发生,而以5—6月和9—10月高温多雨季节发生最为严重。它的病菌以介壳虫分泌的蜜露为养料,并借介壳虫进行传播,因此,凡介壳虫发生严重的果园,膏药病病株通常也较多。灵川县海洋公社国清大队果园场,共有温州蜜 Citrus plaster disease damage branches, affecting the normal growth and development of plant local tissues, often serious disease branches above the dead, the yield decreased. The disease may occur in southern China from April to December, while the most serious is in May-June and September-October in the hot and rainy seasons. Its germs to honeydew secretion of scale insects nourishment, and spread by scale insects spread, therefore, where scale insects serious orchard, plaster diseased strains are usually more. Lingchuan County Ocean Corporation Guoqing Brigade orchard, a total of Wenzhou honey