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題名 | 加州苜蓿夜蛾核多角體病毒對臺灣九種鱗翅目害蟲之致病力=Investigation of Pathogenicity of AcMNPV to Nine Lepidopteran Pests in Taiwan |
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作者 | 段淑人; 高穗生; 趙裕展; 侯豐男; | 書刊名 | 中華昆蟲 |
卷期 | 17:4 1997.12[民86.12] |
頁次 | 頁209-226 |
分類號 | 433.3 |
關鍵詞 | 加州苜蓿夜蛾核多角體病毒; 致病力; 鱗翅目害蟲; Autographa californica nucleopolyhedrovirus; Pathogenicity; Lepidopteran pest; |
語文 | 中文(Chinese) |
中文摘要 | 本文探討加州苜蓿夜蛾核多角體病毒(Autographa californica nucleopolyhedro- virus,AcMNPV)對本省九種鱗翅目害蟲-斜紋夜蛾(Spodoptera litura)、甜菜夜蛾(S. exigua)、菸芽夜蛾(Heliothis virescens)、玉米穗蟲(Helicoverpa armigera)、擬尺蠖(Trichoplusia ni)、亞洲玉米螟(Ostrinia furnacalis)、小菜蛾(Plutella xylostella)、外米綴蛾(Corcyra cephalonica)及大蠟蛾(Galleria mellonella)之致病力。試驗結果顯示以擬尺蠖、小菜蛾及甜菜夜蛾之罹病死亡率最高,對三齡幼蟲之半致死濃度依序為1.24、2.07x10□、及2.40xl0□ PIBs/mm3;以7.8x102 PIBs/mm3,接種幼蟲時,其半致死時間依序為3.7、6.3、及7.8天。菸芽夜蛾、斜紋夜蛾、亞洲玉米螟與大蠟蛾次之,玉米穗蟲之感受性極低,而外米綴蛾經由多次試驗,均未發現受此病毒感染致死之蟲體。加州苜蓿夜蛾之核多角體病毒除造成寄主急性感染,病毒在脂肪體細胞、表皮真皮層細胞、氣管鞘細胞、血球細胞等核內大量複製,造成細胞崩解,而導致幼蟲在數天內潰爛死亡之外,還會影饗殘存之幼蟲的正常生長發育,使其脫皮時間延遲,甚至脫皮不全而死,並使化蛹率及羽化率明顯下降;另發現畸型蛹、死蛹、與成蟲捲翅的比率偏高。 |
英文摘要 | Pathogenicity andhistopathologyof Autographa californica nucleopolyhedrovirus (AcMNPV) to larvae of 9 lepidopteran species in Taiwan were investigated. Trichoplusia ni, Plutella xylostella, and Spodoptera exigua were highly susceptible to AcMNPV; LC50 values fo AcMNPV to the 3rd instar larvae at 6th day postinoculation were 1.24, 2.07×10□, and 2.40×10□ PIBs/mm3, respectively. Their LT50 values at a concentration of 7.8×102 PIBs/mm3 were 3.7, 6.3, and 7.8d, respectively. Heliothis virescens, S. litura, Ostrinia furnacalis, and Galleria mellonella were found to be moderately susceptible. Helicoverpa armigera showed a very low mortality, while Corcyra cephalonica was not infected with AcMNPV. In the infected larvae, target cells became swollen and finally lysed resulting from the formation of inclusion bodies, especially, in the fat body, hypodermis, tracheal matrix, and hemocytes. Furthermore, the infected larvae prolonged larval development, failed to molt or pupate, and finally died. Thepupation and adult emergence of infected larvae decreased, whereas the number of abnormal pupae and moths increased. |
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