(58(4):265-272)Aphicidal Efficacy of Emulsified Soybean Oil Against Aphis gossypii Glover (Homoptera: Aphididae)

Abstract

大豆油及其乳化劑對棉蚜的致死試驗於室內25℃±1℃下進行。結果顯示大豆油乳化液確有殺死棉蚜(Aphis gossypii Glover)的效果，大豆油對棉蚜的LC50與LC90分別為1.09-1.28與3.96-5.78mL/L。乳化劑亦具殺蚜效果，可以0.25:1的比例與大豆油混合，其效果與高用量的2:1差異不顯著。本試驗比較Sigma-Aldrich Co之R&D級與市售3種品牌的大豆油對棉蚜之致死效果，四者間差異不顯著。由此可知以Tween 80與Span 80乳化的食用大豆油用於防治棉蚜具有潛力。A study on the mortality of cotton aphid (Aphis gossypii Glover) treated with soybean oil and its emulsifier was conducted in laboratory under 25℃±1℃. Results revealed that the aphicidal efficacy of soybean oil emulsion was available. The LC50 and LC90 of soybean oil were 1.09-1.28 and 3.96-5.78mL/L, respectively. The emulsifier was also effective against cotton aphid. The emulsifier and soybean oil in the ratio of 0.25 to 1 had no significant difference from 2:1, and there was no difference among Sigma-Aldrich R&D grade and 3 market products of soybean oil comparing their aphicidal efficacy. However, the edible soybean oil emulsified with Tween 80 and Span 80 is potentially preventable for A. gossypii control