烟嘧磺隆对夏玉米药害原因分析及对策

烟嘧磺隆是夏玉米田常用的苗后茎叶处理除草剂,由于高温时期用药、随意加大用药量、对水量过少和使用器械不当等原因,造成玉米药害时有发生。通过控制用药时期、选择适宜施药时间、严格用药量和对水量、提高药剂喷雾技术、保证与有机磷农药间隔期等措施,可有效预防烟嘧磺隆药害的发生。如发生药害可采取摘除卷曲心叶、摘除过多的蘖芽和加强田间栽培管理等措施,可减轻药害损失。

Roason Analysis and Countermeasure of Nicosulfuron Phytotoxicity on Summer Maize in Yuncheng Yanhu District

Nicosulfuron is commonly used in summer maize as postemergence and foliar applied herbicide. Phytotoxicity occurred often in summer maize because of high temperature, arbitrarily increasing the dosage, insufficient diuction and improper use of equipment. By controlling the application period, choosing the appropriate application time, restricting application rate and diluent times, improving spray technology and ensuring the use of organophosphorus pesticides interval, Nicosulfuron phytotoxicity could be prevented effectively. If it occured, the losseds could be reduced by removing the curly leaf and excessive tiller buds, strengthening field man- agement and other measures the losses, could be reduced.