藥毒所95年度

57 間致合成性費洛蒙活性降低有待探討。 初步試驗黑角舞蛾性費洛蒙之有效距離 約可達 40 m 。由 2006 年彰化八卦山國家風 景區利用性費洛蒙誘捕黑角舞蛾雄成蟲之族 群密度變動情形,顯示 5 月上旬即有雄成蟲 羽化出現,族群密度的高峰期為 5/11~6/12 約 1 個月的期間, 7 月以後即無雄成蟲羽化出 現。 表 16. 於台中縣霧峰鄉象鼻山試驗合成性費洛蒙誘餌與處女雌蟲對黑角舞蛾雄蛾之誘引力 Table 16. Attractiveness of different batch of synthetic sex pheromone and virgin female to males of Lymantria xylina in Xiang-bi-shan, Wufeng, Taichung county, Taiwan, during May 12 to 26, 2006 Synthetic sex pheromone % of male captured / trap 1 ) Providence-2005 19.4 ± 8.2 b Providence-2006 36.8 ± 7.2 a TACTRI-2006 38.7 ± 7.5 a Virgin female 3.9 ± 5.7 c Blank 1.2 ± 1.3 c Total males captured 60.4 ± 24.8 1 ) Mean ± S.D. derived from 11 replicates. Data were transformed to arc sine x prior to analysis, and means followed by the same letters were not significantly different at 5 % level by Duncan’s multiple range test. 表 17. 於台中縣霧峰鄉象鼻山試驗不同型式誘蟲器對黑角舞蛾雄蛾之誘捕效果 Table 17. Efficiency of various trap types with sex pheromone on trapping Lymatria xylina males in Xiang-bi-shan, Wufeng, Taichung county, Taiwan, during May 26 to June 23, 2006 Trap type No. of males captured / trap 1 ) Single 2000 ml PET bottle with 4 opening of 3 cm 2 16.8 ± 6.9 a Dome-shape plastic trap 10.2 ± 13.4 a 1 ) Mean ± S.D. derived from 5 replicates. Data were transformed to x+1 prior to analysis, and means followed by the same letters were not significantly different at 5 % level by t-test. • 利用本土微生物合理有效地防治化學農藥難以防治之害蟲 • 利用推薦濃度半量之因滅汀混合甜菜夜 蛾核多角體病毒進行青蔥甜菜夜蛾防治試 驗,在兩試驗田中均呈現有效之防治作用(表 18. )。以白殭菌進行對黑角舞蛾幼蟲病原性 測試,證實該菌對黑角舞蛾幼蟲確具致死作 用。 從低劑量化學性殺蟲劑混合綠殭菌或病 毒對重要夜蛾科害蟲之生物檢定,結果,可 看出 5% 因滅汀對甜菜夜蛾幼蟲毒性極 高,即使是在 40,000 倍( W.D.G )之處理, 仍能造成 97.6% 之供試蟲隻死亡。但百滅寧 乳劑對該蟲之殺蟲效果不佳, 4 種濃度處理 之蟲體最高死亡率僅為 20% 。供試綠殭菌菌 株對甜菜夜蛾幼蟲病原性極強,以田間常用 之一半濃度( 5x10 6 conidia/ml ),仍引發 95.8% 之幼蟲死亡,與供試兩種殺蟲劑混合 處理甜菜夜蛾幼蟲時,也因此而無法呈現協 力或加乘作用。

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