相思樹種子園內取食種子之昆蟲調查

Investigation of Seed Predators in a Taiwan Acacia (Acacia confusa Merr.) Seed Orchard

黃冠瑋(Guan-Wei Huang) ； 蔡佳彬(Jia-Bin Tsai) ； 陸聲山(Sheng-Shan Lu) ； 趙家慧(Chia-Hui Chao) ； 宋一鑫(I-Hsin Sung)

《台灣林業科學》 36卷3期 (2021/09) Pp. 245-252

https://doi.org/10.7075/TJFS.202109_36(3).0005

摘要

於2020年5～8月在嘉義縣中埔鄉種子園調查取食相思樹（Acacia confusa Merr.）種子昆蟲，在果莢內發現鞘翅目、膜翅目、鱗翅目等昆蟲危害，其數量百分比依序為50、37.4及12.6%，從形態分類輔以分子鑑定總計6屬6種，有鞘翅目銀合歡長角象鼻蟲（Araecerus levipennis Jordan）、黑斑豆象（Bruchidiusterrenus Sharp）、一種長角象鼻蟲（Exechesops sp.）、鱗翅目蕈蛾（Pyloetis mimosae （Stainton））、一種紋翅蛾（Labdia sp.）、膜翅目一種廣肩小蜂（Eurytoma sp.）。此等相思樹果莢之害蟲，整體造成近五成危害，導致種子產量下降，由於無推薦防治方法，以果莢套袋管理減少種子之損失為目前因應之道。

關鍵字

相思樹 ； 長角象鼻蟲科 ； 豆象科 ； 種子取食者

並列摘要

Seed predators of Taiwan acacia (Acacia confusa Merr.) were investigated in an acacia seed orchard located in Zhongpu, Chiayi County, west-central Taiwan. Pests were found in fruit pods, and the percentages of pests of the Coleoptera, Hymenoptera, and Lepidoptera were 50, 37.4, and 12.6%. Morphological identification with a DNA supplemental analysis identified 6 species, including Araecerus levipennis Jordan, Bruchidius terrenus Sharp, Eurytoma sp., Exechesops sp., Labdia sp., and Pyloetis mimosae (Stainton). These pests were responsible for nearly 50% of the damage to acacia fruit pods, which were subsequently not suitable for seed harvesting. It is recommended to use bagging management to reduce seed losses until a recommended control method is announced.

並列關鍵字

Taiwan Acacia ； Anthribidae ； Bruchidae ； seed predators