Devi P Ahila, Paramasivam M, Prakasam V
Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore, 641 003, India.
Environ Monit Assess. 2015 Jan;187(1):4142. doi: 10.1007/s10661-014-4142-6. Epub 2014 Nov 19.
A supervised field trial was conducted at four different agroclimatic locations in India to evaluate the dissipation pattern and risk assessment of carbendazim and mancozeb in mango fruits following foliar application of mixed formulation of carbendazim 12% and mancozeb 63% fungicide (SAAF-75WP) at recommended dose (90 + 472.5) and double the recommended dose (180 + 945 g a.i. ha(-1)). Average initial deposition of carbendazim was in the range of 1.12 to 2.7 and 1.95 to 4.09 mg kg(-1) and for mancozeb in the range of 2.25 to 2.71 and 4.17 to 5.96 mg kg(-1), given at respective doses. Residues of carbendazim and mancozeb were dissipated to the below detectable limit 7 days after spray at recommended dosage in all the locations. The fungicide degradation followed a first order kinetics with half-lives of 1-5 and 1-3 days, for carbendazim and mancozeb, respectively. The TMRC values, calculated from residue data generated from all four locations, were found to be below the MPI in mango fruit, and hence, the fungicide will not cause any adverse effect after consumption of mango fruits. This data could provide guidance for the proper and safe use of this fungicide mixture for managing disease incidence in mango in India.
在印度四个不同的农业气候区进行了一项监督性田间试验，以评估在芒果果实上按照推荐剂量（90 + 472.5）和双倍推荐剂量（180 + 945克有效成分·公顷⁻¹）叶面喷施12%多菌灵和63%代森锰锌混合杀菌剂（SAAF - 75WP）后多菌灵和代森锰锌的消解模式及风险评估。多菌灵的平均初始沉积量在1.12至2.7毫克·千克⁻¹和1.95至4.09毫克·千克⁻¹范围内，代森锰锌的平均初始沉积量在2.25至2.71毫克·千克⁻¹和4.17至5.96毫克·千克⁻¹范围内，分别对应各自的剂量。在所有地点，按照推荐剂量喷施后7天，多菌灵和代森锰锌的残留量均降至检测限以下。杀菌剂的降解遵循一级动力学，多菌灵和代森锰锌的半衰期分别为1 - 5天和1 - 3天。根据四个地点产生的残留数据计算得出的TMRC值在芒果果实中低于最大残留限量，因此，食用芒果果实后该杀菌剂不会造成任何不良影响。这些数据可为在印度芒果上合理安全使用这种杀菌剂混合物以控制病害发生率提供指导。
