氨唑草酮土壤处理对春玉米田杂草的防治效果

Effects of Soil Treatment with Amicarbazone on Weeds Control in Spring Maize Field

为了明确氨唑草酮土壤处理对春玉米的安全性及对一年生禾本科及阔叶杂草的防除效果,2020年进行了氨唑草酮土壤处理防治春玉米杂草田间药效探索试验。结果表明,春玉米播后苗前土壤处理,氨唑草酮在试验剂量范围内(有效成分用量250~750 g·hm^(-2))安全性较好;氨唑草酮对一年生禾本科杂草防除效果偏低,对一年生阔叶杂草的防除效果较好,而氨唑草酮+精异丙甲草胺混施对一年生禾本科及阔叶杂草的防除效果均较好,施药后30和45 d,总株防效及总鲜重防效达96.5%~98.9%,并且持效期可达45 d以上。建议施药剂量(有效成分用量)为70%氨唑草酮水分散粒剂500 g·hm^(-2)+960 g·L^(-1)精异丙甲草胺乳油1000 g·hm^(-2)。

In order to confirm the safety of amicarbazone to spring maize and control effect to annual grass and broadleaf weeds by soil treatment,field efficacy exploratory test of amicarbazone to weeds in spring maize field by soil treatment was done in 2020.The results showed that the security of spring maize soil treatment after sowing and before seedlings was very good in the dose range of test(active ingredients dosage 250-750 g·ha^(-1)).The control effect of amicarbazone on annual grass weeds was low,good control effect on annual broad-leaved weeds,the control effect on annual grasses and broadleaf weeds was better by mixed application of amicarbazone+S-metolachlor,30 and 45 d after spraying,the total plants efficiency and total fresh weight efficiency were 96.5%-98.9%,and the validity period can reach more than 45 d.The recommended dosage(active ingredients dosage)was 500 g·ha^(-1) of 70%amicarbazone WG+1000 g·ha^(-1) of 960 g·L^(-1) S-metolachlor EC.