抛秧稻田杂草发生与化除技术研究初报

Weeds Occurences and Chemical Control Technique in Casting-planted Rice Field

抛秧田杂草不但种类多，危害重，而且化除难度大，技术要求高，据１９９３～１９９５年的试验、示范结果证明，一般草害田，掌握在抛栽后１０～１５天，每公顷用５０％二氟喹啉酸３７５～４５０克加１０％苄嘧黄隆１５０～２２５克，采用喷雾或毒土（肥）法防治一次，对稗草和多种阔叶草的防效一般可稳定在９０～９３％左右，并且可使亩产增加２成左右，但多草田和漏水田，则应通过二次用药或提高药剂用量的方法加以解决。

The weeds in casting-planted rice field were grievous to harm the crops and difficult to control. The field trials and demonstrations of control weeds with quinclorac and bensulfuron were performed from 1993￣1995.The results showed that using 375-450 g/ha 50% quinclorac-150-225 g/ha bensulfuron one time at 15 days after casting-planting,the control effect to barnyard grass and many broadleaf weeds reached 90￣93%, and significant increase of rice production was obtained. The weeding technique was suggested in water leakage field and in the field where weeds are very serious.