Cabras P, Angioni A, Garau V L, Melis M, Pirisi F M, Cabitza F, Pala M
Dipartimento di Tossicologia, Università di Cagliari, Italy.
J Environ Sci Health B. 2001 Sep;36(5):609-18. doi: 10.1081/PFC-100106189.
Artificial rainfalls were used to determine the effect of the amount of the rainfall and the time interval between pesticide application and rainfall event, on folpet and mancozeb residues on grapes and vine leaves. Forty-five mm of rain were administered to the vineyard in different amounts (45; 30+15; 15+15+15 mm). Folpet showed good rainfastness on the grapes and on the leaves. A modest decrease was observed only in the experiments that had received 45 mm of rain at one go. Mancozeb showed a lower rainfastness, since a portion of the deposit was easily washed off also by a modest rainfall. The percentage of this portion was higher in the grapes (38%) than in the leaves (20%). The data obtained in these experiments show that, in the case of folpet, it is not necessary to repeat the treatment when it rains the day after, while it is recommendable to repeat it in the case of mancozeb.
通过人工降雨来确定降雨量以及施药与降雨事件之间的时间间隔对葡萄和葡萄叶上福美双和代森锰锌残留量的影响。向葡萄园施加了45毫米的降雨，施加方式不同（45毫米一次性降雨；30毫米 + 15毫米；15毫米 + 15毫米 + 15毫米）。福美双在葡萄和叶片上表现出良好的耐雨水冲刷性。仅在一次性接受45毫米降雨的实验中观察到有适度下降。代森锰锌的耐雨水冲刷性较低，因为即使是适度降雨也能轻易冲掉一部分沉积物。这部分在葡萄中的比例（38%）高于在叶片中的比例（20%）。这些实验获得的数据表明，对于福美双而言，在施药后第二天降雨的情况下无需重复施药，而对于代森锰锌则建议重复施药。
