摘 要：
本研究旨在明确头花杜鹃挥发油的化学成分及其对烟草甲、赤拟谷盗和嗜卷书虱的毒杀作用.利用GC/MS分析了头花杜鹃叶挥发油的化学组分;通过触杀和驱避试验测试头花杜鹃叶挥发油的生物活性.结果表明:从头花杜鹃叶挥发油中鉴定出的成分共有30种,占总成分的100.00%,其主要成分为:α-蒎烯(25.32%)、β-蒎烯(19.90%)和6,8-吡啶并[3,4-d]嘧啶-4(3H)-酮酸盐(7.45%);头花杜鹃叶挥发油对烟草甲、赤拟谷盗和嗜卷书虱的LD50分别为44.40、104.92μg/头和98.87μg/cm2;在测试2 h和4 h后其对赤拟谷盗和嗜卷书虱的驱避效果与阳性对照除虫菊素产生的效果一致.上述结果表明,头花杜鹃叶挥发油对烟草甲、赤拟谷盗和嗜卷书虱均具有较好的毒杀作用,这可能与头花杜鹃叶挥发油中的主要成分α-蒎烯有关.
作 者：
ZHANG Lijuan;ZHOU Jiaxin;WANG Mengzhen;HU Gang;LIANG Junyu;College of Life Sciences, Northwest Normal University;
关键词：
Rhododendron capitatum;;Lasioderma serricorne;;Tribolium castaneum;;Liposcelis bostrychophila
摘 要：
This study focused on analyzing the chemical composition of the essential oils from Rhododendron capitatum Maxim. and examining the toxic activities of the oils against Lasioderma serricorne, Tribolium castaneum and Liposcelis bostrychophila. The activities of the oils were tested via contact toxicity and repellent activity assays, and its chemical components were analyzed by GC-MS. Thirty components from the essential oils extracted from R.capitatum were identified and the sum of their contents accounted for 100.00% of the essential oil; the major components were α-pinene(25.32%), β-pinene(19.90%) and pyrido [3,4-d] pyrimidine-4(3 H)-one, 6,8-dimethyl(7.45%). The essential oils exhibited potential contact toxicity against L.serricorne(LD_(50)=44.40 μg/adult), T.castaneum(LD_(50)=104.92 μg/adult) and L.bostrychophila(LD_(50)=98.87 μg/cm~2), and its repellent activity against T.castaneum and L.bostrychophila, was consistent with that of the positive control DEET.R.capitatum essential oils had significant toxic activities against 3 kinds of storage pests, which might be related to the main component α-pinene in the essential oils.
