甘藷蟻象合成性費洛蒙誘蟲活性之風洞檢測

The wind tunnel assay method for synthetic sex pheromone of sweet potato weevil, Cylas formicarius elegantulus

洪巧珍(Hung, C. C.) ； 王文龍(Wang, W. L.) ； 江碧媛(Chiang, B. Y.) ； 顏耀平(Yen, Y. P.)

《植物保護學會會刊》 46卷2期 (2004/06) Pp. 113-122

https://doi.org/10.6715/PPB.200406_46(2).0002

摘要

在長300 cm、寬77 cm及高75 cm之風洞中，於27.0±2.0℃、70±5% RH、12L:12D光照週期、風速0.17～0.20 m/s及光照度36.7±8.2 lux條件下，探討及檢測甘藷蟻象性費洛蒙誘蟲活性之方法與效果。測試時，於風洞前端上風處75 cm處置放甘藷蟻象玻璃漏斗檢定器，另於距離檢定器放置處150 cm之下風處釋放50-200隻雄蟲，經30 min後觀察記錄誘捕蟲數。於風洞中，20隻甘藷蟻象雌蟲對雄蟲之誘引力表現於晚間，於21:00～24:00達高峰，反應率僅為4.8～5.7%。雄蟲於一天24小時中對其性費洛蒙誘餌均有反應，每小時經30 min之平均反應率為29.5±6.1%。比較不同周齡雄蟲對性費洛蒙之反應，以二、三及四週齡者較佳，反應率分別為40.5、43.0及42.4%；一及五週齡者對性費洛蒙之反應率降低，分別為25.6及32.3%。不同批次合成性費洛蒙對甘藷蟻象之誘蟲活性有差異，雄蟲反應率概在33～44%。不同包裝材質之密封性測試顯示，甘藷蟻象雄蟲對費洛蒙誘餌以PVC塑膠袋包裝者之反應率最高30.1±5.7%；以鋁箔紙及鋁箔袋包裝者反應率低，僅分別為3.4±1.8%及2.0±1.4%；空白組為0.6±0.5%；由此結果顯示甘藷蟻象性費洛蒙誘餌以鋁箔袋與鋁箔紙包裝貯存，密封性佳，而PVC塑膠袋則不適合用來包裝費洛蒙誘餌。

關鍵字

甘藷蟻象 ； 合成性費洛蒙 ； 風洞

並列摘要

Assay methods for sex pheromone of sweet potato weevil, Cylas formicarius elegantulus, were studied in a wind tunnel with the specification of 300 cm length, 77 cm width and 75 cm height at 27.0±2.0℃, 70±5 % RH, 12L: 12D photoperiod, 0.17-0.20 m/s wind velocity and light intensity 36.7±8.2 lux. The attractive period of 20-female weevils was found in scotographase. Peak activity occurred at 21:00～24:00, and reactive rates were only between 4.8 to 5.7 % by wind tunnel tests. Whereas male weevils responded to sex pheromone lure in all 24 hrs, and the reactive rate was 29.5±6.1 % in average. Response of different ages of male sweet potato weevils to the synthetic sex pheromone lure in wind tunnel showed that 2, 3, and 4-weeks-old male weevils performed higher response than 1 and 5-weeks-old male weevils. The reactive rates of the former were 40.5, 43.0, 42.4 % and the latter were 25.6, 32.2 %, respectively. Reactive rates of male sweet potato weevil to different batches of synthetic sex pheromone lures in wind tunnel were between 33-44 %. The results of wrapping materials for sex pheromone lures showed that aluminum bag (or paper) was more suitable than plastic bag for wrapping sex pheromone lures of sweet potato weevil.

並列關鍵字

sweet potato weevil ； Cylas formicarius elegantulus ； synthetic sex pheromone ； wind tunnel