煤基酸-草甘膦在防除果园杂草治理中的增效作用

 为明确煤基酸-草甘膦在防治果园杂草中的效果和增效作用,以及减少果园用药量和用药次数,减少对环境的污染;为其在农业生产中的应用提供依据,我们在果园进行了研究。结果显示:(1)煤基酸-草甘膦药后10d,株防效以WHA₂,JFA₂为最好,分别为94.6%,92.3%。(2)对杂草种类的防效从第10d杂草死亡率效果看,煤基酸-草甘膦各处理对藜(灰菜)、夏至草的防效均达到98.2%~100%。(3)煤基酸-草甘膦各处理对杂草防效均比单独使用草甘膦的效果要好,增效范围在25.6%~58.2%之间,对少数杂草(如:蒿)的增效高达79%,可有效防止杂草漫延。不同种类杂草受药后反应快慢不一,而且有些杂草是随着煤基酸的浓度增高而敏感性相应增强。

A Study on the Effect of Coal-based Acid-glyphosate on Controlling Weed in Orchard

Experiments were made, so as to know the controlling effect of coal-based acid-glyphosate on weeds in orchard, reduce application dosage of insecticides and provide basis for its use in agricultural production. The results showed 10 days after application controlling effect was related to application concentration. The higher the concentration was, the better the effect was. WHA2 and JFA2 were the best, with the controlling effect of 94.6% and 92.3% respectively. Weed killing rate ranged from 98.2% to 100% with regards to Chenopodium serotinum and Lagopsis supina. The control had vigorous growth of weeds. When used in combination with coal-based acid, glyphosate showed better effect compared with being used alone. The effect increased 25.6% - 58.2%. For Artemisia argyi the effect could be as high as 79%. Coal-based acid showed fast and obvious effect in inhibiting and controlling the growth of weeds, but it had selective effect. After application weeds showed different performance. For some the effect was fast, for others the effect was slow. Some weeds became more sensitive with the increase of concentration. The findings in the experiments had certain significance on further studies on the combined application of coal-based acid and glyphosate.