Residues and Application Safety Assessment of Difenoconazole on Cucumber and Soil(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Residues and Application Safety Assessment of Difenoconazole on Cucumber and Soil

Author(s):: WANG Shao-min¹; SONG Guo-chun²; LI Zhe³; YU Jian-lei²; SUN Jing-yu³; 1.Shandong Agricultural Administor College，Jinan，Shandong 250100;
2.Institute of Plant Protection，Shandong Academy of Agricultural Sciences，Jinan，Shandong 250100;
3.College of Plant Protection，Shandong Agricultural University，Tai’an，Shandong 271018

Abstract:: In order to study the residual characteristic and safety of difenoconazole in cucumber，field experiment and laboratory testing were conducted to reveal residual degradation dynamics and the final residues of difenoconazole in cucumber and soil.The results showed that the half-life of difenoconazole in cucumber and soil were 2.9 days to 4.0 days and 12.5 days to 16.1 days，respectively；residue degradation rate in cucumber at 14 days after application was above 92%，and it was above 85% in soil at 42 days after application.When the cucumber was sprayed 4 to 5 times with 125.0 g/hm² and 187.5 g/hm² of difenoconazole (250 g/L EC)，the last application was done 2 days before harvesting，the residue of difenoconazole in the harvested cucumber was lower than 1 mg/kg.It was suggested that the preharvest interval of difenoconazole in cucumber was 2 days.

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Last Update: 2014-08-30