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標題: The effects of different temperature treatments on hatching rates and periods of the Casuarina moth''s (Lymantria xylina) diapausing eggs
不同溫度處理黑角舞蛾(Lymantria xylina) 休眠卵對其孵化天數與孵化率的影響
作者: Jeng, Chao-Chih
關鍵字: 黑角舞蛾;Casuarina moth;溫度處理;滯育;diapause;temperature treatments
出版社: 昆蟲學系
The casuarina moth (Lymantria xylina Swinhoe) is a serious defoliated pest of hardwood plant and fruit trees in Taiwan. The larvae feed on hardwood plants of more than 65 spices belonging to 23 plant Families. There host plants include nine economically important fruit trees that are cultivated widely in Taiwan, such as the longan and the litchi. The life history of casuarina moth is lasts for one year. This moth overwinters in diapausing egg stage for 8 or 9 months. We collected the egg masses of casuarina moth from field, removing outside hair-scaled shelter from the egg masses, then sterilized the eggs. We then put the eggs of the casuarina moth in the growth chamber(25℃、RH60%) for 10 days. After that 10-day period, the eggs were stored under four different temperatures. The eggs of the control treatment were stored in another growth chamber (27℃) directly. The hatching rate of the eggs under 6℃ is the lowest while the hatching rate of 15℃ treatment is the highest among the four treatments. No strong relationship was found from the first treatment to the last one between the treatment at 6℃ and the hatching days after the eggs were remove to normal growth chamber. Whereas, a negative relationship was found between treated temperatures and hatching days of all the treatments under 9℃, 12℃, and 15℃. The hatching days of the casuarina moth eggs under these temperatures (9, 12, and 15℃) decreased along with the increase of treated days.

黑角舞蛾(Lymantria xylina)是鱗翅目毒蛾科(Lymantriidae)的林木害蟲,幼蟲會取食超過23科63種的木本植物,其中包括龍眼和荔枝等九種在台灣栽種面積廣大的經濟果樹。黑角舞蛾的生活史長達一年,卵進入滯育之後以卵期越冬,其卵期長達8~9個月。本實驗將野外取得的黑角舞蛾的卵塊經過去除外面覆蓋鱗毛、消毒之後,先放置在25℃、RH60%的定溫生長箱中10天之後,再儲存在攝氏6℃、9℃、12℃、15℃四種溫度底下,對照組則直接放置在27℃的生長箱中。結果發現四種溫度之中6℃處理的卵粒的孵化率最低,15℃處理的卵粒孵化率最高。6℃處理過的卵粒,從處理第60天到處理第220天的卵粒取出後孵化天數之間並沒有呈現相關性;而9℃、12℃、15℃三個處理溫度下的卵粒則有處理天數和卵取出的孵化天數有呈現負相關性,意即在此三個溫度處理之下的黑角舞蛾卵粒的孵化天數會隨著處理天數的增加而逐漸減少。
Appears in Collections:昆蟲學系

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