温度和光照对松褐天牛生长的影响

Effect of Temperature and Light on Growth of Monochamus alternatus

1999 ～ 2000年在浙江省杭州市研究了温度和光照对松褐天牛幼虫生长的影响，结果为：在正常情况下，松褐天牛 1 年 1 代，以 4 龄幼虫越冬，在光照 16 h（6 ～ 22 时），适当升温（12 ～ 15℃）时部份幼虫能够化蛹或者羽化成虫，短日照 8 h（8 ～ 16 时）抑制幼虫生长，或者产生滞育幼虫，逆反自然界正常日照能诱发幼虫滞育。临界光周期虫态尚待继续观察，8 月中下旬产的卵，孵化的幼虫以 3 龄幼虫在树皮越冬，不能蛀入木质部。

Study on effect of temperature and light on growth of Monochamus alternatus in Hangzhou, Zhejiang province, from 1999 to 2000 resulted that M. alternatus has one generation a year under normal conditions, and overwinteres with 4-instar larva. Treated by 16 hours(6:00-22:00) illuminatioon and heating(12-15℃), part larva could pupate or eclose. Short sunshine(8:00-16:00) inhibits growth of larva or produces diapause larva. Reverse illumination induces larva diapause. Dynamics of the insect treated by critical light time need to be observed. Larva pupated from eggs laid in middle and late ten days of August overwinters in bark instead of in xylem with 3-instar larva.