怎样使用植物生长调节剂一、４０％乙烯利水剂（一试灵）（一）苗期叶面喷雾能促进瓜类雌花分化，降低结瓜节位，促进提早结瓜和增根，控制徒长。用于黄瓜、酉葫芦，一般可在３～４片真叶期用１００～２００ＰＰｍ药液喷叶１～２次，每隔７天喷一次；中、后期雌花少时继续... How to use plant growth regulator A, 40% ethephon (a spirit) (A) of the foliar spray seedling can promote melon female flower differentiation, reduce knot node, promote early knot and root, control leggy. For cucumber, unitary gourd, usually 3 to 4 true leaves with 100 ~ 200PPm spray liquid leaves 1 or 2 times, spray once every 7 days;