Cetin Huseyin, Erler Fedai, Yanikoglu Atila
Biology Department, Faculty of Arts and Science, Akdeniz University, 07058 Antalya, Turkey.
Pest Manag Sci. 2007 Aug;63(8):830-3. doi: 10.1002/ps.1401.
The pine processionary moth (PPM), Thaumetopoea wilkinsoni Tams. (Lepidoptera: Thaumatopoeidae), is an important forest pest in the Mediterranean area, and urticating hairs of the caterpillars of this species cause allergic reactions on skin of humans and animals. In the present study, the larvicidal activities of Turkish oregano (Origanum onites L.) essential oil and its four major components, carvacrol, gamma-terpinene, terpinen-4-ol and thymol, were evaluated against fourth/fifth-instar larvae of PPM under laboratory conditions. The essential oil was larvicidal to PPM with an LD(50) value of 3800 microL L(-1) when 0.1 mL was applied per larva. Carvacrol was the most toxic component found in the essential oil (LD(50) = 3100 microL L(-1)), followed by thymol (LD(50) = 5500 microL L(-1)). The other two components, gamma-terpinene and terpinen-4-ol, were less effective. The results showed that Turkish oregano essential oil and its two components, carvacrol and thymol, could be potential alternatives to synthetic insecticides for the control of PPM.
松异舟蛾（PPM），即威尔金森异舟蛾（Thaumetopoea wilkinsoni Tams.）（鳞翅目：异舟蛾科），是地中海地区一种重要的森林害虫，该物种幼虫的刺毛会引起人类和动物皮肤的过敏反应。在本研究中，在实验室条件下评估了土耳其牛至（Origanum onites L.）精油及其四种主要成分香芹酚、γ-萜品烯、萜品-4-醇和百里香酚对松异舟蛾四龄/五龄幼虫的杀幼虫活性。当每头幼虫施用0.1 mL精油时，其对松异舟蛾具有杀幼虫活性，LD(50)值为3800 μL L(-1)。香芹酚是精油中毒性最强的成分（LD(50) = 3100 μL L(-1)），其次是百里香酚（LD(50) = 5500 μL L(-1)）。另外两种成分γ-萜品烯和萜品-4-醇效果较差。结果表明，土耳其牛至精油及其两种成分香芹酚和百里香酚可能是控制松异舟蛾的合成杀虫剂的潜在替代品。
