1　柿蒂虫发生特点　 1996年 8月经对河南省淅川县 13个乡 (镇 )调查 ,柿蒂虫的为害特点 :一是老龄树的柿蒂虫重于幼龄树 ,共调查 1150株 ,其中 10年生以下 510株 ,虫株率 2 8% ,虫果率 2 5% ,10～ 2 0年生树虫株率 4 7% ,虫果率 3 1% ,2 0年生以上树虫株率 61% ,虫果率 5 1% 1 The occurrence characteristics of persimmon bug In August 1996, the investigation of 13 townships (towns) in Xichuan County, Henan Province, the damage characteristics of persimmon pests: First, the old tree persimmon insect weight more than young trees, a total of 1150 strains were investigated, of which 510 plants below 10 years of age, the worm strain rate of 28%, insect fruit rate of 25%, 10 ~ 20 annual tree plant rate of 47%, worm fruit rate of 31%, 20 years old plant rate of 61% , Insect fruit rate 5 1%