Inhibitory ability and field efficacy trials of seed coating agents against pathogenic fungi causing peanut root rot and white silk disease
[Aims]The aim of this study is to investigate the efficacy of different seed coating agents in controlling peanut root rot and white silk disease,thereby providing a theoretical foundation for their production and application.[Methods]The mycelial growth rate method and field plot trial were employed.[Results]The results of laboratory fungistatic test showed that the inhibition rates of tetramycin 0.3％aqueous solution at 0.08 mg a.i./L and metalaxyl-M fludioxonil 3.5％suspension concentrate for seed treatment at 1.89 mg a.i./L exhibited the highest efficacy against Fusarium oxysporum and Sclerotium rolfsii,with inhibition rates reaching 62.71％and 98.71％,respectively.The results of field trial show that the treatments of tetramycin 0.3％aqueous solution at 0.51 mg a.i./100kg seed and metalaxyl-M·fludioxonil 3.5％suspension concentrate for seed treatment at 12.60 mg a.i./100kg seed,demonstrated superior control over peanut root rot and white rot disease,achieving control efficacy of 82.16％and 74.72％,respectively.Each treatment resulted in a seedling emergence rate exceeding 92％.Among all treatments,the highest peanut yield was observed in plots treated with metalaxyl-M·fludioxonil 3.5％suspension concentrate for seed treatment applied at 12.60 mg a.i./100kg seed,resulting in a fresh weight of 3.21 kg and a dry weight of 1.54 kg.[Conclusions]Tetramycin 0.3％aqueous solution(0.51 mg a.i./100kg seed)and metalaxyl-M·fludioxonil 3.5％suspension concentrate for seed treatment(12.60 mg a.i./100kg seed)has been demonstrated to be an effective strategy for controlling peanut root rot and white silk disease,respectively.
万方数据
维普
