Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Guangzhou, China.
MS Swaminathan School of Agriculture, Centurion University of Technology and Management, Odisha, India.
Sci Rep. 2022 Jun 9;12(1):9524. doi: 10.1038/s41598-022-13325-8.
The striped flea beetle (SFB, Phyllotreta striolata) can cause serious harm to cruciferous crops in both the larval and adult stages. Presently, there are no other sustainable alternatives to the use of chemical pesticides for controlling SFB infestation. In this study, the use of a seed-pelletized coating of spinetoram effectively reduced the numbers of SFB and its feedings on the flowering cabbage seedlings, whereas, in combination with the insect-proof net, it controlled the SFB infestation throughout the cabbage growth period. The analysis of the pesticide residues in soil and different cabbage parts indicated the degradation dynamics of spinetoram. The concentration of spinetoram in cabbage parts decreased over time, while increased first and subsequently decreased in soil. Furthermore, estimation of the half-life of spinetoram revealed that via seed-palletized application spinetoram half-life was found to be 2.82 days in soil, 4.21 days in the root, 5.77 days in the stem, and 3.57 days in the leaf, respectively. Both the lower pesticide residues and the half-life of spinetoram in soil and cabbage parts suggested it to be a promising environment and food-safe pesticide in controlling SFB. Moreover, the seed-pelletized coating ensured a sustainable release of spinetoram that can reduce the pesticide application frequency and be cost-effective and pocket-friendly for the farmers.
斜纹叶甲（SFB，Phyllotreta striolata）在幼虫和成虫阶段均可对十字花科作物造成严重危害。目前，除了使用化学农药防治 SFB 外，尚无其他可持续替代方法。本研究表明，使用噻虫啉种衣丸可有效减少 SFB 的数量及其对开花白菜苗的取食，而与防虫网结合使用可控制整个白菜生长期的 SFB 侵染。对土壤和不同白菜部位的农药残留分析表明了噻虫啉的降解动态。随着时间的推移，白菜各部位噻虫啉的浓度逐渐降低，而土壤中的浓度先增加后降低。此外，噻虫啉半衰期的估计表明，通过种衣丸施用，噻虫啉在土壤中的半衰期为 2.82 天，在根中的半衰期为 4.21 天，在茎中的半衰期为 5.77 天，在叶中的半衰期为 3.57 天。土壤和白菜各部位的农药残留量较低，噻虫啉的半衰期较短，表明其是一种有前途的环境和食品安全农药，可用于防治 SFB。此外，种衣丸包衣确保了噻虫啉的可持续释放，可降低农药使用频率，对农民来说具有成本效益和实惠。
