Insecticide Resistance Study in Plutella xylostella L. Ⅰ. Developing a Sampling Method for Surveying
Other Title
小菜蛾抗藥性之研究－Ⅰ.調查方法之探討
Journal
中華農業研究
Journal Volume
30
Journal Issue
3
Pages
277-284
Date Issued
1981-09-08
Date
1981-09-08
Author(s)
Edward Y. Cheng
鄭允
Abstract
A sampling method for surveying the insecticide-resistance in diamondback moth, Plutella xylostella L. has been developed in a large vegetable growing area in Taiwan. We identified a diamondback moth population which was homogeneous in the permethrin resistance and the coverage of this population was about five thousand hectares. The result indicated that the diamondback moth has the ability in mixing their different genetic strains in a quite large area. The fact made us believe that the distribution pattern survey of insecticide-resistance in diamondback moth served a real significance in the future pest management study of this pest. Based on the analysis of the data obtained, we further considered that sampling diamondback moth in five separated cruciferus fields in an area of five thousand hectares was both economical and accurate in measuring the insecticide resistance.
為建立本省各蔬菜產地小菜蛾（Plutella xylostella L.）抗藥程度測定體系，必須了解小菜蛾抗藥品系空間分布與距離之關係，從而決定正確的取樣距離與頻度。此研究係在溪湖、永靖地區約140平方公里範圍之蔬菜栽培區，每隔四至五公里，設置樣本區一處，全區共設立四個樣本區，每一樣本區取樣四個採集點，各點相距約一至二百公尺，均為獨立之十字花科菜田，共計十六處採集點，將所採得小菜蛾幼蟲及蛹携返室內，用不噴殺蟲劑之甘藍菜飼養，取其第一代三齡幼蟲，測定其對培丹及百減靈的半量致死濃度，再將所得資料按區排列，以變方分析不同區間樣本之差異。尋得具共同抗藥程度之族群後，再比較小菜蛾樣本數與平均值之機差關係，由此一關係訂定最經濟的取樣數，但以不嚴重影響統計值的正確性為原則，在此，吾人訂定之容許機差為10%，取樣量為五個樣本點。因為研究結果顯示抗藥族群具相同抗藥力者可涵蓋五千公頃之廣，亦小菜蛾有相當的能力不斷地混合田間的生理小種，樣本點相距數百公尺之差異不大，而在無障礙物時此一現象尤其一致，因此在五千公頃範圍之蔬菜專業區內，只需獨立取樣五點，即可測出有代表性的抗藥程度，供預測之用。
Publisher
農業試驗所
Type
journal article
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