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适宜番茄开花结果的温度为20～25℃,春番茄在开花结果前期,外界气温不到20℃,易造成大量落花落果。过去生产上用 2,4-D防止番茄脱落,虽效果很好,但易引起药害,故不宜使用.前几年改用4—氯苯氧乙酸(亦称“防落素”、“番茄灵”), 虽保花保果的效果也很好,药害又轻,但它不溶于水,使用很不方便。上海联合化工厂近年研制成“座果灵”,易溶于水,剂型有片剂和粉剂两种,粉剂每小包1克,片剂每片0.1克,片剂更便于个体农户使用。我们对该剂在番茄上进行了试验,现将结果报道如下:
Suitable for tomato flowering temperature of 20 ~ 25 ℃, the early spring flowering tomato results, the outside temperature is less than 20 ℃, easy to cause a lot of flowers drop fruit. In the past the production of 2,4-D to prevent tomato shedding, although the effect is very good, but easy to cause phytotoxicity, it is not appropriate to use a few years ago with 4-chlorophenoxyacetic acid (also known as “ Spirit ”), although the effect of Paul flower and fruit preservation is also very good, harm and light, but it is insoluble in water, very inconvenient to use. In recent years, Shanghai United Chemical Co., Ltd. has developed a “seat fruit spirit” that is easily soluble in water. There are two kinds of tablets and powder formulations, one gram of powder per tablet and 0.1 gram of tablet per tablet. The tablets are more convenient for individual farmers to use. We tested the agent on tomato and we now report the results as follows: