Agricultural Engineering Sciences, University of Baghdad, Al-Jadriya Campus, Baghdad 10071, Iraq.
College of Science, Health, Engineering and Education, Murdoch University, South Street, Murdoch, WA 6150, Australia.
Molecules. 2021 May 20;26(10):3055. doi: 10.3390/molecules26103055.
The insecticidal activities of essential oils obtained from black pepper, eucalyptus, rosemary, and tea tree and their binary combinations were investigated against the green peach aphid, (Aphididae: Hemiptera), under laboratory and glasshouse conditions. All the tested essential oils significantly reduced and controlled the green peach aphid population and caused higher mortality. In this study, black pepper and tea tree pure essential oils were found to be an effective insecticide, with 80% mortality when used through contact application. However, for combinations of essential oils from black pepper + tea tree (BT) and rosemary + tea tree (RT) tested as contact treatment, the mortality was 98.33%. The essential oil combinations exhibited synergistic and additive interactions for insecticidal activities. The combination of black pepper + tea tree, eucalyptus + tea tree (ET), and tea tree + rosemary showed enhanced activity, with synergy rates of 3.24, 2.65, and 2.74, respectively. Essential oils formulation was effective on the mortality of aphids. Fourier Transform Infrared Spectroscopy (FTIR) analysis showed that stability of a mixture of essential oils was not affected by store temperature (15, 25, and 35 °C) and the functional groups were not changed during storage. Based on our results, the essential oils can be used as a commercial insecticide against .
从黑胡椒、桉树、迷迭香和茶树中提取的精油及其二元混合物对桃蚜（Aphididae：半翅目）的杀虫活性进行了研究，在实验室和温室条件下进行了研究。所有测试的精油都显著降低和控制了桃蚜种群，并导致更高的死亡率。在这项研究中，黑胡椒和茶树纯精油被发现是一种有效的杀虫剂，接触应用时死亡率达到 80%。然而，作为接触处理测试的黑胡椒+茶树（BT）和迷迭香+茶树（RT）精油混合物的组合，死亡率为 98.33%。精油混合物对杀虫活性表现出协同和相加的相互作用。黑胡椒+茶树、桉树+茶树（ET）和茶树+迷迭香的组合表现出增强的活性，协同率分别为 3.24、2.65 和 2.74。精油配方对蚜虫的死亡率有效。傅里叶变换红外光谱（FTIR）分析表明，精油混合物的稳定性不受储存温度（15、25 和 35°C）的影响，储存过程中官能团没有变化。根据我们的结果，这些精油可作为商业杀虫剂用于防治桃蚜。
