摘要:
采用紫外线(UV-B)辐射2龄和5龄茶尺蠖幼虫,测定5个辐射时间处理下(0、30、60、90、120、150 min)茶尺蠖幼虫的发育历期、化蛹率、蛹畸形率和羽化率等生长发育指标。结果表明:与对照相比,随着紫外线辐射时间增加,2龄尺蠖幼虫发育历期期显著延长,死亡率和畸蛹显著升高,化蛹率、蛹重、羽化率显著降低,但对5龄幼虫的生长发育影响不显著。在同一辐射时间下,2龄与5龄幼虫死亡率与化蛹率有显著差异性,而畸蛹率差异性不显著,但总体上2龄幼虫羽化率低于5龄幼虫。其中150 mim处理组的羽化率两者具有显著差异性。
Abstract:
The 2nd and 5th instar of Ectropis oblqua larvae were exposed to UV-B for 0, 30, 60, 90, 120, or 150 min to determine the effects of the irradiation on the development time as well as the rates of pupation, pupa emergence, and deformity of the larvae. The results showed that, as compared with control,the development for the 2nd instar larvae was significantly delayed, the abnormal pupation and mortality rates significantly increased, and the pupation rate, pupal weight, and emergence rate reduced. On the other hand,the sustained irradiation did not exert significant effect on the growth or development of the 5 instar larvae. Under a same irradiation treatment, the mortality and pupation rates of the 2nd and 5th instar differed significantly,but the abnormal pupation rate was not significantly different from that of control, while the eclosion rate of the 2nd instar generally lower than that of the 5th instar counterpart. The eclosion rate of the 2nd instar after being exposed to UV-B for 150min significantly differed from that of control or the 5th instar larvae.
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