Diapause Termination in Casuarina Moth (Lymantria xylina) Eggs

黑角舞蛾（Lymantria xylina Swinhoe）休眠卵滯育打破之研究

黃紹毅(Shaw-Yhi Hwang) ； 鄭朝誌(Chao-Chih Jeng) ； 沈澤祈(Tse-Chi Shen) ； 謝宜珊(Yi-Shan Shae) ； 劉承祥(Chen-Shawn Liu)

《台灣昆蟲》 24卷1期 (2004/03) Pp. iv+43-52

https://doi.org/10.6661/TESFE.2004004

摘要

The casuarina moth, Lymantria xylina Swinhoe, is an important pest of hardwood and fruit trees. Overwintering casuarina moths enter an obligatory diapause as a pharate first instar larva. We assessed the relationship between chilling duration and temperature in terminating the diapause stage of casuarina moth eggs. Eggs of the casuarina moth were exposed to a variety of artificial chilling conditions that differed in duration and temperature. Results indicated that diapausing eggs require exposure to cold temperatures (9~15°C) followed by warm temperatures (27°C) for successful emergence in the laboratory. Eggs exposed to longer chilling periods required shorter incubation times to emerge than eggs exposed to shorter chilling periods. Regression analyses revealed a negative relationship between emergence time and chilling duration. The use of a proper chilling temperature and duration can effectively shorten diapause of casuarina moth eggs and make the routine rearing of casuarina moth populations possible.

關鍵字

Lymantria xylina ； egg diapause ； chilling treatment

並列摘要

黑角舞蛾（Lymantria xylina Swinhoe）是一嚴重的林木和果樹害蟲，此蟲會以休眠卵的方式越冬。本研究主要是探討冷藏處理對打破黑角舞蛾休眠卵的影響，研究的方法是將黑角舞蛾的卵置於不同的冷藏箱及冷藏不同的時間後，觀察卵的孵化情形。結果發現黑角舞蛾的休眠卵要先經一段冷藏（9～15°C）時間，再經一段回溫期（27°C）後，才能在實驗室中順利孵化。結果也顯示，冷藏越久的卵，回溫後卵孵化所需要的時間越短。同時，回歸分析顯示孵化時間與冷藏的時間呈現負相關的關係。因此，使用適當的冷藏溫度及冷藏時間，可以有效的縮短黑角舞蛾休眠卵所需休眠的時間。

並列關鍵字

黑角舞蛾 ； 滯育卵 ； 冷藏處理