一、前言 梨实蝇(Dacus terrugineus var.Pedalis Bezzi)是梨、桃果实的毁灭性害虫,产卵的遗痕云南果农和“苍蝇脚”,以幼虫(梨蛆)潜居果内食害果肉,致成蛆梨,品质败坏,不堪食用。在为害果中,以宝珠梨、雪梨受害最重,据晋宁果林乡农民反映:1957年梨果被害率达50％以上,桃果(特别是大黄桃)几无收成。此外疵梨、摩登梨、海东梨、酸大梨、黄梨、夏至桃、小暑桃、秋桃等均遭害,惟程度极轻。作者于1957至1958年在云南 I. Introduction Dacus terrugineus var. Pedalis Bezzi is a devastating pest of pear and peach fruits, a spawning relic of Yunnan farmers and “flies feet”, with larvae (pear maggot) Into the maggots pear, the quality of corruption, unbearable consumption. In the fruit, pear, pear victims most heavily, according to Jinlin Guo Lin farmers reflect: pear damage rate of 50% or more in 1957, peach (especially the big yellow peach) few harvest. In addition, Pear, Pear, Haitong pear, sour pear, yellow pear, summer peach, small summer peach, autumn peach and so on are victims, but the degree is very light. Author from 1957 to 1958 in Yunnan