Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Volos, Greece.
Pest Manag Sci. 2020 Sep;76(9):3066-3077. doi: 10.1002/ps.5858. Epub 2020 Apr 29.
Linalool is a natural scent, found in essential oils (EOs) of several plants. It is widely used as a fragrant, also possessing toxic, oviposition-deterrent and repellent properties against many insect species. Ceratitis capitata (medfly) is one of the most notorious insect pests for international fresh fruit production. Despite the available information on the repellent effects of EOs on herbivorous insects, possible oviposition-deterrent effects of linalool against C. capitata remain unknown.
We tested whether different linalool concentrations, application methods on fruit hosts and time since application elicited oviposition-deterrence on medfly, from bitter oranges, apples and nectarines, under constant laboratory conditions. We also tested possible repellent properties of linalool on adult medflies in field conditions. Females drilled fewer oviposition stings and deposited fewer eggs per fruit in all linalool-treated hosts. Spraying and topical-droplet application were the most efficient methods on bitter oranges, although spraying was the least effective method in apples. Bitter oranges and nectarines that were offered to females immediately post-exposure to linalool received more oviposition stings and eggs than those offered 3 days post-exposure to linalool solutions. Conversely, apples tested 3 days following linalool application received significantly more oviposition stings and eggs than those tested immediately and 1 day post-exposure. More adults in total, and more females, were captured in traps located on untreated-control than on linalool-treated trees, especially in citrus hosts.
Linalool has a potential future use in environmentally friendly control strategies against C. capitata. © 2020 Society of Chemical Industry.
芳樟醇是一种天然香味物质，存在于多种植物的精油（EOs）中。它被广泛用作香料，同时具有毒性、产卵驱避和驱避许多昆虫物种的特性。地中海实蝇（medfly）是国际新鲜水果生产中最臭名昭著的害虫之一。尽管有关于 EOs 对草食性昆虫驱避作用的可用信息，但芳樟醇对 C. capitata 可能的产卵驱避作用尚不清楚。
我们测试了不同浓度的芳樟醇、在果实寄主上的应用方法以及应用后的时间对地中海实蝇产卵的驱避作用，实验条件为恒定的实验室条件。我们还测试了芳樟醇在野外条件下对成年地中海实蝇可能的驱避特性。与对照相比，在所有处理过的寄主上，雌性地中海实蝇的产卵刺孔数和每果产卵数都较少。在苦橙上，喷雾和局部液滴应用是最有效的方法，尽管在苹果上喷雾是最无效的方法。与接触芳樟醇溶液 3 天后提供的果实相比，立即接触芳樟醇后提供的苦橙和油桃果实受到的产卵刺孔和产卵数更多。相反，在芳樟醇处理后 3 天测试的苹果接受的产卵刺孔和产卵数明显多于立即测试和 1 天后测试的苹果。与未处理的对照树相比，陷阱中捕获的成虫总数和更多的雌虫都位于未处理的对照树上，尤其是在柑橘寄主上。
芳樟醇在环保防治地中海实蝇的策略中具有潜在的未来用途。 © 2020 英国化学学会。
