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1、为害特点:李实蜂以初孵幼虫蛀入幼果内为害,以幼嫩李种仁为食,边吃边排粪便,使李幼果被吃成空壳。当李幼果长到黄豆粒大小时停止生长,随着幼虫的老熟脱果后被害幼果才逐渐干瘪脱落,使李树造成大量减产。 2、发生规律:李实蜂一年发生一代,以老熟幼虫在土中或土块下结茧越夏越冬,休眠期长达十个月,第二年春季李花开放时,羽化成虫,其成虫喜欢在晴朗的午间气温升高时活动,飞舞交尾,早、晚或阴雨天静伏在花中或花萼下,交尾后将卵产在花托或花萼处,初孵幼虫在花托或花萼处寻食,以后很快蛀入幼果内进行为害,取食李软核。到五至六月份幼虫逐渐老熟从果内脱出落地,然后进入地下或土块下结茧率休眠越夏越冬。 3、防治方法:①在成虫发生及产卵期喷药且
1, the damage characteristics: Li Shi bee newly hatched larvae infesting young fruit to young Lee seed for food, eating side defecation, so that young fruit was eaten into a shell. When the young fruit grows to the size of the soybean, it stops growing. As young larvae mature and decocted, the young fruit is gradually shriveled and fallen off, causing the plum trees to reduce massively. 2, the occurrence of law: Li Shibei a generation a year to mature larvae in the soil or soil cocoons under the summer overwintering, dormancy for up to ten months, the second spring when the flowers open, the emergence of adults, The adults prefer to move in the sunny afternoon when the temperature rises, fly swirling, early, late or rainy days in the flowers or calyx, after mating the eggs in the receptacle or calyx, the newly hatched larva at the receptacle or calyx After looking for food, soon after emaciated into young fruit damage, take Li soft nucleus. From May to June, the larva gradually become familiar and emerge from the fruit and fall into the ground, then enter the ground or clod under the cocoon rate dormant summer overwintering. 3, prevention and treatment methods: ① in the occurrence and spawning of adult spraying and