桑皱鞘叶甲生物学特性及综合防治

桑皱鞘叶甲是桑树春叶期的重要害虫，在江西修水县2年发生1代，以成虫和中等大小的幼虫在桑园土下15－60cm深处的土室内越冬，越冬成虫于次年4月下旬至5月上旬大量出土并繁殖为害，为害高峰期为4月底到6月中旬。幼虫分布范围为土下10－65cm，其中以30－50cm最多。当年孵化的幼虫至11月中下旬开始越冬，次年3月中下旬继续取食和生长，9月上旬至10月中旬化蛹，9月下旬至11月底羽化并静伏于土室内过冬。在自然条件下各虫态发育历期为：卵期9－10d，幼虫期15－16个月，蛹期16－19d。成虫寿命8－9个月，其中土下蛰伏6－7个月，出土生活2－3个月。可用昆虫病原线虫压低土中幼虫密度及成虫高峰期施用杀虫剂，并辅以人工防治的方法防治该虫。

ON THE BIOLOGY AND INTEGRATED CONTROL OF MULBERRY BEETLE ABIRUS FORTUNEI(BALY)(COLEOPTERA:EUMOLPIDAE)

The mulberry beetle Abirusfortunei(Baly) , a major leaf insect pest of mulberry in spring leaf period, has one generation every two years in Xiushui County, Jiangxi Province. It overwinters with adult and a few middle size larvae in soil chamber 15-60 cm underground in mulberry fields. The adults come out of hibernation since late April to early June and feed on the tender leaves of branch tips, their serious damage occurs in the end of April to middle June. The initial capulation is taken place 5 days after the adults go out from the soil, and the peak times of copulation and ovipo-sition are in early-middle May and late May-middle/late June, respectively. The larvae hatch successively since middle May to middle August and feed on the underground part of mulberry tree, within the range of 10-65 cm, mainly in 30 - 50 cm, under the soil surface. All the larvae in the first year of development overwinter in the soil chamber individually since middle/late November and no pupation occurs in this year. They feed again since middle/late March next year, and pupate in early September to middle October, the adults emerge in late September to late November in soil chamber and get into hibernation without movement. Naturally, the durations of egg, larva, pupa and the lifespan of adult are 9-10 days, 15 - 16 months, 15 - 19 days and 8 - 9 months (including 6 - 7 months in dormancy underground), respectively. To control this insect pest, the ento-mopathogenic nematodes can be used on the soil surface to suppress the larval density underground, and use appropriate amount of selective insecticides in the peak occurrence time of adult combined with artificial catching.