蓖麻蠶卵繼代平腹小蜂於荔枝椿象卵寄生之評估

荔枝椿象(Tessaratoma papillosa(Drury))為近年來嚴重危害無患子科(Sapindaceae)果樹及行道樹的重要入侵害蟲，而平腹小蜂(Anastatus japonicus)則為目前田間發現可有效寄生此害蟲卵的本土性天敵。本研究嘗試以蓖麻蠶卵(Samia cynthia (Drury))作為替代寄主，進行平腹小蜂的室內繼代飼育族群，結果顯示5-10日齡雌寄生蜂平均每日可分別繁殖4.2±0.7之子代寄生蜂。評估以蓖麻蠶卵繼代飼育一年後之子代族群的寄生表現，以田間採集寄生於荔枝樁象卵的自然族群作為對照組，結果顯示繼代飼育與自然族群平均每一雌蜂每日可分別繁殖3.6±0.7及4.8±0.7之子代寄生蜂，二者間無顯著差異；而二者子代的雌成蟲各佔其子代總數的84%和90%，平均數量分別為3.0±0.6 且4.4 ±0.6，彼此間亦無顯著差異。此初步結果顯示以蓖麻蠶卵作為替代寄主，經室內繼代飼育的平腹小蜂子代可發揮相當於自然寄生蜂族群之寄生效能，目前已建立相關大量飼有技術，有助於未來應用於果園區或行道樹上荔枝樁象的生物防治。

關鍵字

荔枝樁象；蓖麻蠶；平腹小蜂；自然族群；繼代飼育

並列摘要

Litchi stinkbug (Tessaratoma papillosa (Drury)), an invasive pest, was found in recent years, causing severe injury to the plant family Sapindaceae including longan and litchi, etc. Anastatus japonicas (Ashmead) is a native species egg parasitoid recognized as an efficient biological control measure for the pest. In this study, we established the system to produce eggs of Sanda cynthia (Drury) in laboratory, then use the eggs to rear A. japonicas. The results showed that the average number ofthe wasp emerge from S. cynthia egg was 4.2 ± 0.7 a day per wasp. Evaluated the performance of laboratory colony reproduce by S. cynthia egg after one year, we compare with the colony caught from field that emerge from T. papillosa eggs. The results from the laboratory and field colony deposit 3.6 ± 0.7 and 4.8 ± 0.7 offspring respectively, shows no significant different. The female was about 84% and 90% in whole offspring, and the mean number was 3.0 ± 0.6 and 4.4 ± 0.6, shows no significant different. These results suggest that using S. cynthia eggs to reproduce A. japonicas has the same efficiency on parasitized T. papillosa eggs. We attempt to develop mass rearing technology to controlling T. papillosa in the future.

並列關鍵字

Tessaratoma papillosa ； Samia cynthia ； Anastatus japonicas ； wild-caught laboratory-reared

國際替代計量

蓖麻蠶卵繼代平腹小蜂於荔枝椿象卵寄生之評估

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