Effects of 35% Difenoconazole·Fludioxonil·Thiamethoxam Seed Coating Agent on Winter Wheat Growth and Development and Prevention and Control Tests of Root Rot and Wireworms

In order to test effects of 35% difenoconazole·fludioxonil·thiamethoxam seed coating agent on emergence and agronomic traits of winter wheat and prevention and control effects of wheat root rot and wireworms，wheat variety of Shixin 828 was taken as tested variety， field experiments were conducted from 2016～2017.3 different drug seed mass ratios were set（58.3，87.5 and 175 g/100 kg seed）to determine the most appropriate dosage.Results showed that all pesticides did not produce phytotoxicity on wheat， wheat sprouted safely， wheat plant quality was enhanced， and wheat was mature and safe.Effects of different treatments on wheat diseases and insect pests were similar with no significant difference.Compared with blank control trial （CK），yield increase rate of 58.3，87.5 and 175 g/100 kg were 5.55%，6.45% and 7.77%，respectively.Yield increase rate of medicaments were 5.41%， 5.13% and 5.27%，respectively，difference was significant compared to controlled.Optimum dosage for wheat was 87.5 g/100 kg coating when 35% difenoconazole fludioxonil thiamethoxam suspension seed coating was used.