Ganguly Pritam, Barik Suhrid Ranjan, Patra Sandip, Roy Sankhajit, Bhattacharyya Anjan
Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal, India.
Indian Council of Agricultural Research for North Eastern Hill Region, Shillong, Meghalaya, India.
Environ Toxicol Chem. 2017 Nov;36(11):3028-3033. doi: 10.1002/etc.3872. Epub 2017 Jul 17.
A multilocational field trial was conducted at 4 locations in India-Rajasthan, Gujarat, Madhya Pradesh, and West Bengal-to determine the persistence in cabbage of chlorfluazuron applied twice at 75 and 150 g active ingredient ha . Cabbage head samples were collected from each replicated plot on 0 (2 h after spraying), 1, 3, 5, 7, 10, and 15 d after final insecticide application, including an untreated control. Chlorfluazuron residue in cabbage and field soil was estimated by high-performance liquid chromatography using a photo diode array detector. The limit of determination and limit of quantification of the method were recorded as 0.05 and 0.10 μg g , respectively. Results revealed that chlorfluazuron dissipated linearly with progress of time, following first-order kinetics. The mean (± standard deviation) half-life value of chlorfluazuron in cabbage was found to be 7.18 ± 0.71 d, considering different locations and treatments. The residue was below the level of quantification in the harvested cabbage and soil samples. Harvesting cabbage in the experimental location, at least on day 7, after 2 applications of chlorfluazuron at the recommended dose, may not pose any ill effect for Indian adults. Environ Toxicol Chem 2017;36:3028-3033. © 2017 SETAC.
在印度的拉贾斯坦邦、古吉拉特邦、中央邦和西孟加拉邦的4个地点进行了一项多地点田间试验，以确定在甘蓝上以75和150克活性成分/公顷的剂量施用两次氟虫脲后的残留情况。在最后一次施用杀虫剂后的0天（喷雾后2小时）、1天、3天、5天、7天、10天和15天，从每个重复地块采集甘蓝头样本，包括一个未处理的对照。使用光电二极管阵列检测器通过高效液相色谱法估算甘蓝和田间土壤中的氟虫脲残留量。该方法的测定限和定量限分别记录为0.05和0.10微克/克。结果表明，氟虫脲随时间呈线性消散，符合一级动力学。考虑到不同地点和处理方式，氟虫脲在甘蓝中的平均（±标准差）半衰期值为7.18±0.71天。在收获的甘蓝和土壤样本中，残留量低于定量水平。在实验地点，按照推荐剂量施用两次氟虫脲后，至少在第7天收获甘蓝，可能不会对印度成年人造成任何不良影响。《环境毒理学与化学》2０17年；36：3028 - 3033。©2017 SETAC。
