种衣剂拌种对花生根腐病的防治研究

Study on the control of peanut root rot by seed coating agent

本研究以2个高感根腐病的花生品种为试验材料,评价4种种衣剂单剂及复配组合共8个处理对花生出苗和苗期生长的影响及对根腐病的防治效果,筛选出苗率高、防病效果佳的种衣剂。采用种子包衣法进行根腐病田间药效试验,以不包衣为空白对照(CK)。研究表明各包衣处理对花生出苗和植株生长有促进作用,可降低产量损失,对2个花生品种的根腐病防效分别为11.42%~36.94%,17.53%~34.01%。主茎高、出苗率和产量与病情指数呈极显著负相关,与防治效果呈极显著正相关。ZYJ1(2.5%咯菌腈+25%嘧菌酯+24%噻呋酰胺)三元复配可用于防治花生根腐病,起到保苗壮苗、降低感病程度的作用,且促进增产,对根腐病有较好的防治效果。

In this study,two peanut varieties with high susceptibility to root rot were used as test materials to evaluate the effects of eight seed coating treatments on peanut emergence and seedling growth and the control effect on root rot.The objective was to identify seed coating agents that exhibited high seedling emergence rates and effec-tive disease prevention.Field efficacy trials for controlling root rot were conducted using seed coating methods,with untreated seeds serving as the control(CK).The results indicated that all seed coating treatments promoted seedling emergence and plant growth,leading to reduced yield losses.The disease control efficacy ranged from 11.42%to 36.94%and 17.53%to 34.01%for the two peanut varieties,respectively.The main stem height,seedling emer-gence rate,and yield showed a significantly negative correlation with disease severity index,while exhibiting a sig-nificantly positive correlation with disease control efficacy.The seed coating agent ZYJ1 was found to effectively control peanut root rot,contributing to seedling vigor,reducing disease severity,and promoting increased yield.It demonstrated good efficacy in the prevention and control of root rot in peanuts.