Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling 712100, Shaanxi, China.
Shaanxi Research Center of Biopesticide Engineering & Technology, Yangling 712100, Shaanxi, China.
Molecules. 2016 Oct 12;21(10):1359. doi: 10.3390/molecules21101359.
In order to develop novel botanical insecticides, the joint action of oil (LCO) and lemongrass oil (LO) against van der Goot was determined systematically indoors and outdoors. The chemical profiles of LCO and LO as determined by gas chromatography-mass spectrometry (GC-MS) analysis revealed that the main compounds from LCO were ()-ligustilide (44.58%) and senkyunolide A (26.92%), and that of LO were geranial (42.16%) and neral (32.58%), respectively. The mixture of LCO and LO showed significant synergy against , with a common-toxicity coefficient (CTC) value of 221.46 at the optimal ratio of LCO to LO (4:1, :). Based on the results of solvents and emulsifiers screening, oil·Lemongrass oil 20% emulsifiable concentrate (20% LCO·LO EC) was developed, and its stability was confirmed with tests of cold and thermal storage. Field trials indicated that the insecticidal activity of the diluted 20% LCO·LO EC (1000 fold dilution) was comparable to conventional pesticide (20% imidacloprid EC) on seven days after application. Thus, the mixture of LCO and LO has the potential to be further developed as a botanical pesticide.
为了开发新型植物性杀虫剂，系统地在室内和室外测定了油（LCO）和柠檬草油（LO）对 van der Goot 的联合作用。气相色谱-质谱（GC-MS）分析确定的 LCO 和 LO 的化学特征表明，LCO 的主要化合物为（）-藁本内酯（44.58%）和川芎嗪 A（26.92%），而 LO 的主要化合物为柠檬醛（42.16%）和橙花醛（32.58%）。LCO 和 LO 的混合物对具有显著的协同作用，最佳 LCO 与 LO 比例（4：1，：）下的共同毒性系数（CTC）值为 221.46。基于溶剂和乳化剂筛选的结果，开发了油·柠檬草油 20%乳油（20% LCO·LO EC），并通过冷藏和热储试验确认了其稳定性。田间试验表明，稀释 20% LCO·LO EC（1000 倍稀释）的杀虫活性在施药后 7 天与常规农药（20%吡虫啉 EC）相当。因此，LCO 和 LO 的混合物具有进一步开发为植物性农药的潜力。
