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首页> 外文期刊>Journal of environmental science and health >Development of controlled release formulations of thiram employing amphiphilic polymers and their bioefficacy evaluation in seed quality enhancement studies
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Development of controlled release formulations of thiram employing amphiphilic polymers and their bioefficacy evaluation in seed quality enhancement studies

机译：使用两亲性聚合物开发的噻菌灵控释制剂及其在种子品质增强研究中的生物功效评估

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Controlled release formulations of Thiram (Dimethylcarbamothioylsulfanyl-N,N-dimethylcarbamodithioate), a contact fungicide, have been prepared using laboratory synthesized poly(ethylene glycol) (PEG) based functionalized amphiphilic copolymers. The kinetics of thiram from developed controlled release (CR) formulations were studied in comparison with that of the commercially available 75 WS. Release from the commercial formulation was faster than with the developed CR formulations. Maximum amount of thiram was released on 35th day for PEG-2000 4d, 28th day for PEG-1500 4c, 21 st day for PEG-1000 4b and 15th day for PEG-600 4a in comparison to commercial formulation (7th day). The diffusion exponent (n) of thiram in water ranged from 0.356 to 0.545 in the tested formulations. The half-release (t_(1/2)) values ranged between 14.78 to 22.1 days, and the Period of Optimum Availability (POA) of thiram ranged from 7.79 to 25.15 days. An effort has also been made to identify the suitable polymers that could reduce the seed deterioration during storage and also act as an effective carrier of fungicide thiram. The results demonstrate that the seeds coated with the different formulations deteriorated at a slower pace as manifested in high germination percentage over control. Apart from the fungicidal effect of thiram, the polymers acted as barriers to moisture reducing the rate of seed deterioration and checked the degradation of thiram. The CR formulation 4d, with PEG 2000, was found to be most effective as seed coat.
机译：使用实验室合成的基于聚乙二醇（PEG）的功能性两亲共聚物，已制备了接触性杀菌剂Thiram（二甲基氨基甲硫基硫烷基硫烷基-N，N-二甲基氨基氨基二硫酸酯）的控释制剂。与市售的75 WS相比，研究了开发的控释（CR）制剂中的thiram动力学。从商业配方中释放比在开发的CR配方中更快。与商业制剂相比（第7天），在PEG-2000 4d的第35天，PEG-1500 4c的第28天，PEG-1000 4b的第21天和PEG-600 4a的第15天释放出最大量的thiram。在测试制剂中，硫醇在水中的扩散指数（n）为0.356至0.545。半释放（t_（1/2））的值介于14.78至22.1天之间，而锡兰的最佳有效期（POA）则介于7.79至25.15天之间。还已经做出努力来鉴定合适的聚合物，所述聚合物可以减少在储存期间的种子变质并且还充当杀真菌剂硫醇的有效载体。结果表明，用不同制剂包衣的种子以较慢的速度恶化，表现为相对于对照高的发芽率。除了对锡拉姆具有杀真菌作用外，这些聚合物还起到了防潮的作用，从而降低了种子变质的速度并阻止了锡拉姆的降解。发现具有PEG 2000的CR制剂4d最有效地用作种皮。

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