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頁籤選單縮合
題 名 | Occurrence of the Legume Pod Borer, Maruca testulalis Geyer (Lepidoptera: Pyralidae) on Cowpea (Vigna nguiculata Walp) and Its Insecticides Application Trial=豆莢螟在豇豆上的發生及藥劑防治試驗 |
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作 者 | 廖君達; 林金樹; | 書刊名 | 植物保護學會會刊 |
卷 期 | 42:4 2000.12[民89.12] |
頁 次 | 頁213-222 |
分類號 | 433.3 |
關鍵詞 | 豆莢螟; 發生; 殺蟲劑; 防治; 豇豆; Maruca testulalis; Occurrence; Insecticides; Control; Cowpea; |
語 文 | 英文(English) |
中文摘要 | 豆莢螟是豇豆栽培期間的重要害蟲,主要危害花器及豆莢部位。本試驗在調查豆莢螟幼蟲在花器 及豆莢上的分布及週年族群變動情形。結果顯示,豆莢螟幼蟲在不同高度之花器及豆莢內的垂直 分布並無顯著性差異。多數的一、二齡幼蟲位於花器部位,三齡幼蟲分布於花器及豆莢部位無顯 著差異,四及五齡幼蟲則多數位於豆莢。豆莢螟於豇豆春作的危害率顯著高於夏作及秋作,受害 高峰期發生於五月下旬。試驗中以八種殺蟲劑用來評估對豆莢螟的防治效果。結果顯示,第滅寧 及加保扶的效果最佳。硫敵克處理的豇豆,每公頃平均鮮莢產量可達4950.9公斤為最高。豆莢螟 危害,可造成17 %至53 %的產量損失。經過殺蟲劑的施用,能夠顯著地增加鮮莢產量及降低豆莢 螟所造成的損失。 |
英文摘要 | The legume pod borer (LPB), Maruca testulalis Geyer (Lepidoptera : Pyralidae), is a serious pest of cowpea. LPB larvae prefer to attack floral parts and pods. The distribution of LPB larvae on flowers and pods and their population fluctuation were investigated in Changhua, Taiwan. These results suggested that larval vertical distribution of LPB did not significantly different among the strata of the flowers and pods of cowpea plants. Most of the 1st and 2nd instar larvae were observed on flowers, while the majority of the 4th to 5th instars were found on pods. The infestation level of LPB was greater for spring crops than for those in summer and autumn. Meanwhile, the maximum larval density occurred in late-May for the spring crop. Eight insecticides were tested to evaluate their efficiency in controlling LPB. Deltamethrin and carbaryl appeared more effective than others. Furthermore, the highest pod-yield (an average of 4950.9 kg/ha) was recorded in the thiodicarb-treated plots. Pod yield losses ranging from 17-53 % resulted from LPB damage. Thus, the application of insecticides significantly increased the pod yield and reduced the heavy losses caused by LPB. |
本系統中英文摘要資訊取自各篇刊載內容。