新型水稻田除草剂SIOC0172的作用特性

Herbicidal characteristics of novel herbicide SIOC0172 in paddy

采用常规生测方法研究水稻田除草剂SIOC0172的吸收传导性、耐雨水冲刷性、施药适期和温度对其除草活性的影响等。结果表明,SIOC0172可以通过胚芽、胚根、根、茎、叶各部位的吸收进入植物体内,以向上传导为主;SIOC0172药后不同时间淋雨处理的玉米鲜重抑制率为85%～98%,具有一定抗雨水冲刷能力;该药剂最佳施用时期为杂草1～4叶期和水稻5叶期以上,施药适期较宽;温度变化对该药剂活性的影响较小,在15～35℃温度范围内的ED50值为0.50～1.01mg/L。表明SIOC0172内吸传导性好、不同环境条件下药效发挥稳定和使用时期较长。

SIOC0172 is the 2-pyrimidinyloxy-N-arylbenzylamine novel herbicide in paddy. The absorption and translocation in plant, raining tolerance, application timing and environmental temperature effect on its bioactivity were carried out by the traditional bioassay methods here. The results showed that SIOC0172 was mainly taken up by buds, radicles, roots, stems and leaves and transloeated in plant acropetally within the xylem. The inhibition rate of corn fresh weight was 85% -98% on different time of simu-late rainfalls after the herbicide treatment, which indicated rainfall had little influence on the bioactivity of SIOC0172 and had good rainwashing tolerance. The most suitable application time of SIOC0172 was from 1 to 4-leaf stage of the targeted weeds, and more than 5-leaf stage of rice. The ED50 values of SIOC0172, which were 0.50 - 1.01 mg/L at temperature from 15 to 35℃, showed environmental temperature had little influence on herbicidal activity of SIOC0172. These results showed that SIOC0172 have good absorption and translocation, the activity can stably play in different environment conditions, and the application timing was longer.