Sun Xiao-Ting, He Wei, Jiang Shan, Ge Shi-Shuai, Chu Bo, Liang Ge-Mei, Yang Xian-Ming, Wu Kong-Ming
School of Tropical Agriculture and Forestry, Hainan University, Haikou, China.
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
Pest Manag Sci. 2025 Mar;81(3):1432-1443. doi: 10.1002/ps.8545. Epub 2024 Nov 19.
The sterile insect technique (SIT), involving the rearing of larvae for pupation followed by irradiating pupae, is employed for environmentally friendly invasive pest management. Despite its effectiveness, the cost of pupae production poses challenges for small farmers in developing countries. Alternatively, utilizing insect trapping techniques can capture abundant adult insects in their natural habitats, but application potential of adult SIT approach remains unclear.
We used the invasive pest Spodoptera frugiperda (Lepidoptera: Noctuidae) to assess the effectiveness of X-ray irradiated moths on their sterility rates, mating competitiveness, flight ability, and larval control efficiency in the field. Our findings revealed that optimal X-ray doses for 1-, 3-, and 5-day-old adult S. frugiperda were 154, 173, and 180 Gy, respectively. These doses rendered males more than 80.0% infertile and females nearly completely infertile. Significantly, the flight ability of sterilized males remained unaffected by sub-sterilizing doses of irradiation. Furthermore, in a release ratio of 16:1:1 (irradiated males-unirradiated males-unirradiated females), irradiated males exhibited the highest mating competitiveness (0.79). In the field-cage experiments, the corrected leaf protection rate and the corrected population decline rate in the 16:1:1 release plot were 60.50% and 74.21%, respectively.
These findings suggest that radiation-induced sterility in adult S. frugiperda holds promise for practical applications, offering a conceptual framework and novel approaches for advancing radiation-based pest control technology. © 2024 Society of Chemical Industry.
不育昆虫技术（SIT）包括饲养幼虫化蛹，然后对蛹进行辐照，用于环境友好型入侵害虫管理。尽管该技术有效，但蛹的生产成本给发展中国家的小农户带来了挑战。另外，利用昆虫诱捕技术可以在其自然栖息地捕获大量成虫，但成虫不育昆虫技术方法的应用潜力仍不明确。
我们使用入侵害虫草地贪夜蛾（鳞翅目：夜蛾科）来评估X射线辐照蛾的不育率、交配竞争力、飞行能力以及田间幼虫控制效率。我们的研究结果表明，1日龄、3日龄和5日龄草地贪夜蛾成虫的最佳X射线剂量分别为154、173和180 Gy。这些剂量使雄性不育率超过80.0%，雌性几乎完全不育。值得注意的是，亚不育剂量的辐照对绝育雄性的飞行能力没有影响。此外，在16:1:1（辐照雄性-未辐照雄性-未辐照雌性）的释放比例下，辐照雄性表现出最高的交配竞争力（0.79）。在田间笼养实验中，16:1:1释放区的校正叶片保护率和校正种群下降率分别为60.50%和74.21%。
这些研究结果表明，辐射诱导草地贪夜蛾成虫不育具有实际应用前景，为推进基于辐射的害虫控制技术提供了概念框架和新方法。© 2024化学工业协会。
