高粱田除草剂种类及施药方法筛选试验初报

为了筛选高效的高粱除草剂和适合的施药方式, 我们进行了高粱田间杂草化学防除药剂及施药方法筛选试验, 通过除草效果、产量和收益分析, 初步认为:施药方法上土壤封闭明显优于茎叶处理。土壤封闭剂中, 42%丁·异·莠去津SC、42%异丙草·莠SC除草剂对阔叶杂草和禾本科杂草防除作用优良, 鲜重防效均超过90%, 高粱产量虽低于人工除草, 但差异不显著, 减产幅度在1%以下; 使用这类药剂高粱生产的利润高于人工除草。茎叶处理剂中, 25%辛酰溴苯腈EC等除草剂对高粱生长影响较小, 对藜、反枝苋等阔叶杂草防效高, 高粱产量低于人工除草, 但高粱生产的利润高于人工除草。建议在高粱生产中使用这些除草剂。

Preliminary report on screening test of herbicides and application method in sorghum field

To screen the effective herbicides and application method in Sorghum bicolor field, we carried out the selective test of herbicides, application method, weeding effect, yield and income analysis. The results showed that the effect of pretreatment agents was superior to that of leaf treatment herbicides. Among pretreatment agents, butachlor·isopropyl methyl·atrazine 42% SC and isopropyl methyl·atrazine 42% SC had excellent effect in controlling broad-leaved weeds and grasses with the fresh weight control efficacy of more than 90%. Sorghum yield of the treatments was lower than that of artificial weeding, but there was no significant difference and the reduction rate was below 1%, while the production profit was higher than that of artificial weeding. In the leaf treatment agents, bromoxynil octanoate 25% EC and other herbicides had few impacts on sorghum growth, and had good control effects on broad-leaved weeds, such as Chenopodium album and Amaranthus retroflexus. The sorghum yield of the treatments was lower than that of artificial weeding, but the profit was higher. Therefore, these herbicides are recommended to be applied in sorghum production.