4种种衣剂对红芸豆根腐病的防治效果

4 Kinds of Seed Coatings: Control Effect on Root Rot Disease of Red Kidney Bean

旨在筛选对根腐病防治高效的种衣剂,为红芸豆生产种植提供技术支撑。首先采用室内盆栽,比较出苗率、株高、根长、鲜重、干重等指标,筛选出对红芸豆生长发育安全的种衣剂,再经大田试验,比较不同时期病情指数、防治效果及增产幅度,筛选出防效理想的种衣剂。盆栽试验表明,35%多·福·克悬浮种衣剂、11%精甲·咯·嘧菌悬浮种衣剂、62.5 g/L精甲·咯菌腈悬浮种衣剂、12%甲·嘧·甲霜灵悬浮种衣剂对红芸豆生长均安全。大田试验表明,出苗后10天,11%精甲·咯·嘧菌悬浮种衣剂防治效果最高,达89.28%,12%甲·嘧·甲霜灵悬浮种衣剂、62.5 g/L精甲·咯菌腈悬浮种衣剂、35%多·福·克悬浮种衣剂的防治效果次之,分别为72.56%、67.79%、59.51%。测产结果表明,35%多·福·克悬浮种衣剂增产幅度最高,相比空白对照增产28.35%,11%精甲·咯·嘧菌悬浮种衣剂次之,增产19.64%,但二者差异不显著。综上所述,11%精甲·咯·嘧菌悬浮种衣剂对红芸豆生长安全且防效最高,有较好的应用价值,可与市面上常用的35%多·福·克悬浮种衣剂交替使用。

To screen seed coatings with good control effect on root rot disease for providing support for production and planting of red kidney bean,we compared the emergence rate,plant height,root length,fresh weight and dry weight and so on by indoor pot experiments,screened the seed coatings for the growth and development of red kidney bean.After the field experiment,we compared the disease index,control effect and yield increase in different periods,and selected the ideal seed coatings.The pot experiment showed that:the seed coatings of 35%carbendazim·thiram·carbofuran FSC,11%metalaxyl-M·fludioxonil·azoxystrobin FSC,62.5 g/L metalaxyl-M·fludioxonil FSC and 12%thiophanate-methyl·metalaxyl·azoxystrobin FSC were safe to the growth of red kidney bean;the field experiments showed that:after seedling emergency of 10 days,11%metalaxyl-M·fludioxonil·azoxystrobin FSC had the best control effect with 89.28%,the control effect of 12%thiophanate-methyl·metalaxyl·azoxystrobin FSC,62.5 g/L metalaxyl-M·fludioxonil FSC,and 35%carbendazim·thiram·carbofuran FSC was 72.56%,67.79%and 59.51%,respectively;35%carbendazim·thiram·carbofuran FSC increased the yield most significantly by 28.35%higher than control treatment,11%metalaxyl-M·fludioxonil·azoxystrobin FSC increased the yield by 19.64%,but their difference was not significant.In conclusion,11%metalaxyl-M·fludioxonil·azoxystrobin FSC can control root rot disease significantly with good application value,and can be used interchangeably with 35%carbendazim·thiram·carbofuran FSC commonly used in the market.