Control Effects of Dual Measures of Seed Coating and Soaking on Rice Bakanae Disease

In order to alleviate the aggravation of rice bakanae disease in some areas of Heilongjiang Province, the feasibility of seed coating + soaking double treatment applied to the prevention and control of rice bakanae disease was explored. In this study, 5% Metalaxyl-M·fludioxonil·azoxystrobin FS and 62.5 g · L^-1 Metalaxyl-M·fludioxonil FSC seeds were selected for seed coating, and then the seeds were soaked with cyanobacterium ester for field exploration experiments.The results showed that 5% Metalaxyl-M·fludioxonil·azoxystrobin FS or 62.5 g·L^-1 Metalaxyl-M·fludioxonil FSC seed coating + 25% Phenamacril SC double treatment for rice seedling emergence and growth safety can significantly enhance seedling quality, the average control effect onrice bakanae disease reached 98.47% to 100.00%, significantly higher than a single seed coating or single dip treatment, seed coating dip double treatment is an effective measure to improve the effect of rice bakanae. In production, Priority recommendation 5% Metalaxyl-M·fludioxonil·azoxystrobin FS 1 000 mL·（100 kg）^-1 seed + 25% Phenamacril SC 2 000 solution, Secondly recommendation 62.5 g· L^-1 Metalaxyl-M·fludioxonil FSC 400 mL·（100 kg）^-1 seed + 25% Phenamacril SC 2 000 solution, 5% Metalaxyl-M·fludioxonil·azoxystrobin FS 750 mL·（100 kg）^-1 seed + 25% Phenamacril SC 2 000 solution. It is recommended to increase the application dosage for susceptible varieties or infected seeds.