I. 四黃斑蛾擬寄生性天敵記錄共10 種，實際上會穩定寄生四黃斑 蛾的種類只有Hyposoter distriangulum Chen, Huang & Hsu、
Braconidae sp.1 及 Tachinidae sp.1 3 種。行為及生活史資訊有待 進一步的觀察與研究。最適合作為生物防治者為Braconidae sp.1，因其寄生率與豐度最高。
II. 經統計後，四黃斑蛾總寄生率為 55.03 ± 8.4%，而幼蟲死亡率不 高且羽化率高，推測只靠擬寄生性天敵無法導致其稀有性，應 有其他因素共同影響。
III. 寄主幼蟲群體數量與不同寄主植物對擬寄生性天敵總寄生率、
繭蜂寄生率及機蜂寄生率皆不影響，而不同寄主植物對寄生蠅 寄生率有顯著影響，寄主幼蟲群體數量則沒有影響。
IV. 不同寄主植物之寄生蠅寄生率與推測月桃假葉鞘能使寄主幼蟲 躲避擬寄生性天敵之假設相反，月桃族群之寄生率顯著高於三 奈族群。可能與食用月桃的族群皆為梅嶺族群，食用三奈的族 群多為崁頭山族群有關。
V. 當寄主幼蟲群體數量越多，繭蜂單隻寄主鑽出的繭數量越少，
性別偏向為male-biased 的機率增加，推測繭蜂產卵時會依寄主 數量而調整單隻寄主的產卵量與性別偏向。
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VI. 本種蟲巢提供的保護作用對擬寄生性天敵效果有限，因此切葉 的機制與原因值得探討與研究。
VII. 以上結果有賴進行操作性實驗增進結果可信度，但必須先找出 適合四黃斑蛾交配並產卵的條件。
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圖一、四黃斑蛾生活史 (A)：聚產卵群；(B)：刮食食痕與群聚的小 幼蟲；(C)：群聚的幼蟲；(D)：幼蟲躲藏在月桃之假葉鞘內；(E)：
於枯葉中作繭；(F)：雌性成蟲 (A)
c
(B)
(C) (D)
(E) (F)
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圖二、四黃斑蛾幼蟲切葉行為 (A)：幼蟲切葉順序，紅線為切痕，
藍色箭頭為切葉方向；(B)切痕近照；(C)：葉片下垂與枯黃捲曲，
形成蟲巢
(B) (C)
(A)
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圖三、四黃斑蛾目擊地點。 ：成蟲目擊地點；：：幼蟲目擊與採 集地點
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圖四、四黃斑蛾採集地點。 ：主要採集地點；：：補充採集地點
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圖五、姬蜂 (A)：Hyposoter distriangulum Chen, Huang & Hsu 2017；
(B)：Charops sp.；(C)：Hyposoter distriangulum 的蛹；(D)：
Charops sp. 的蛹 (A)
(A) (B)
(C) (D)
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圖六、繭蜂 (A)：Braconidae sp.1；(B)：Braconidae sp.2；(C)：繭蜂 幼蟲鑽出寄主；(D)：繭蜂的繭；(E)：單寄主羽化之 sp.1 性別偏向
Total n = 131 host larvae
(A) (B)
(C) (D)
(E)
♀-biased, 67.94 % n = 89
♂-biased, 22.14 % n = 29
Non-biased, 9.92 % n = 13
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圖七、小蜂與寄生蠅 (A)：Chalcidoidea sp.1；(B)：Chalcidoidea sp.2；(C)：Chalcidoidea sp.3；(D)：Chalcidoidea sp.4；(E)：
Tachinidae sp.1 (F)：Tachinidae sp.2；(G)：Tachinidae sp.1 的蛹
(A) (B)
(C) (D)
(E) (F)
(F)
33 Ichneumonidae, 16.15 ± 6.0 %
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圖九、單隻寄主鑽出的繭數量和群體數量的相關性：繭數量 = - 0.040456 x 群體數量 + 3.1934475 , R2 = 0.150467 , P < 0.001
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圖十、寄生蠅月桃與三奈族群寄生率之EM 平均值：月桃 – 三奈 = 21.58 ± 9.86%, df = 1, P < 0.05
三奈 月桃
EM平均值 3.11 24.69
95% Wald 信賴區間上限 4.14 36.65
95% Wald 信賴區間下限 2.34 16.64
0 5 10 15 20 25 30 35 40
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表一、四黃斑蛾擬寄生性天敵清單與分佈，標註*者為穩定寄生的種類
Species Distribution
*Hyposoter sp. 台南市東山區崁頭山、台南市楠西區梅嶺、南投縣信義鄉和社、南投縣鹿谷鄉田底
Charops sp. 台南市東山區崁頭山
*Braconidae sp.1 台南市東山區崁頭山、台南市楠西區梅嶺、南投縣信義鄉和社、南投縣鹿谷鄉田底、嘉義縣番路鄉土匪山、
苗栗縣三義鄉關刀山、南投縣鹿谷鄉溪頭、高雄桃源鄉梅口山 Braconidae sp.2 台南市東山區崁頭山
Chalcidoidea sp.1 台南市東山區崁頭山 Chalcidoidea sp.2 台南市東山區崁頭山 Chalcidoidea sp.3 台南市東山區崁頭山
Chalcidoidea sp.4 台南市東山區崁頭山、台南市楠西區梅嶺
*Tachinidae sp.1 台南市東山區崁頭山、台南市楠西區梅嶺、南投縣信義鄉和社、嘉義縣番路鄉土匪山、高雄甲仙區白雲寺、
嘉義縣阿里山鄉山美、台中和平區斯巴可步道 Tachinidae sp.2 台南市東山區崁頭山、南投縣鹿谷鄉溪頭
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表二、群體數量預測繭蜂性別偏向之邏輯迴歸分析，n = 124
B S.E. Wald df P OR
95% CI of OR 下限 上限 群體數量 0.056 0.025 5.019 1 0.025 1.058 1.007 1.111
常數 -1.982 0.466 18.049 1 0.000 0.138 Omnibus 檢定：x2 = 5.172, p = 0.023
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表三、不同飼養下擬寄生性天敵成蟲存活時間
Hyposoter sp. Braconidae sp.1 Tachinidae sp.1 n Mean±SE n Mean±SE n Mean±SE 蜂蜜水 20 12.15 ± 2.03 30 8.5 ± 1.15 10 12 ± 3.37 無餵食 9 2.88 ± 0.94 28 < 1 11 3.91 ± 1.22