芒果双棘长蠹的初步研究

芒果双棘长蠹经室内饲养，在福州一年二代，以幼虫在被害干板材的坑道中越冬，３月化蛹，５月上、中旬羽化高峰期，成虫羽化飞出后，在板材附近活动１～２天后重新蛀咬进入板材为害．４月中旬开始产卵，卵期５～１０天，５月下旬到６月上旬为孵化盛期．８月上、中旬为第１代成虫羽化高峰期．第２代幼虫孵化为害一段时期后进入冬眠．受害板块平均害虫坑道穿材数高达５条／ｃｍ３，板面虫孔平均有１个／ｃｍ２，板块完全失去使用价值．采用硫酰氟３５ｇ／ｍ３、１８～２５℃熏蒸２４小时或２５ｇ／ｍ３熏蒸３６小时，害虫死亡率达１００％；在越冬代及第１代成虫羽化前，用５０％ＤＤＶＰ溶液注射蛀孔灭虫（１．５ｍｌ／孔），可取得同样效果．

A Preliminary Study on Mango Two-horned Bostrychid

Mango two-horned bostrychid (Sinoxylon mangiferae Chujo) were found in the wood Packing case imported from South Korea. When feded in laboratory,the pests have two generations a year and overwinter with the larvae in tunnels of the infected wood. The Pest pupates in March and mostly emerges in the early and middle May. Then,the beetle re-bores the wood. It begins to lay eggs in mid-April and last 5-10 days. It hatches out from the late May to the early June.In the early and middle August,first generation of the year emerges,then second generation larvae begin to hatch out and infect the wood,then hibernate. In the wood infected by this Pest,the average numbers of infecting tunnels and holes are up to 10 Per 2cm3 and 2 per 2cm2 respectively,and thus makes the wood useless. The pests are killed completely with the fumigation of Sulpharyl Fluoride (SO2F2) at 35g/m3. 24h, 18-25℃ or at 25g/m3, 36h, 18-25℃. The treatment of 50% DDVP at 1.5ml Per infected hole will get the same effects before the larvae hibernate and first-generation adult beetles emerge.