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多效唑是二十世纪70年代末由英国帝国(ICI)化学公司新开发的一种植物生长调节剂兼杀菌剂,属植物生长延续剂,也叫抑制剂。多效唑是一种高效低毒的植物生长延缓剂,能增加植株体内叶绿素、蛋白质和核酸的含量,降低赤霉素和吲哚乙酸的含量,增加乙烯的释放量,增强抗倒、抗旱、抗寒及抗病等抗逆性,增加产量,改善品质及提高经济效益。它受到人们广泛关注,认为是迄今为止最好生长延缓剂之一。蔬菜对多效唑的反应比较敏感,使用浓度应根据天气不同、作物种类、不同生育时期、采用不同浓度。我们使用经验表明,采用有效范围内的低浓度;喷洒时只要植株茎叶喷湿欲滴,但不下滴为度,不重喷;可叶面喷施的尽量叶面喷施,不土旋,以避免对后季作物,土壤带来不良影响;一股情况只喷一次即可。为了方便广大菜农合理使用多效唑,结合我们近几年实践经验,收集和整理有关资料,供大家参考。
Paclobutrazol is a plant growth regulator and bactericide newly developed by the British Imperial Agency (ICI) Chemical Company in the late 1970s and is a plant growth extension agent, also known as an inhibitor. Paclobutrazol is a kind of plant retarding agent with high efficiency and low toxicity, which can increase the content of chlorophyll, protein and nucleic acid in plants, reduce the content of gibberellin and indole acetic acid, increase the release of ethylene, enhance the resistance to down, drought and cold And disease resistance and other resistance, increase yield, improve quality and increase economic efficiency. It attracts wide attention and is considered as one of the best growth retardants to date. The response of vegetables to paclobutrazol is sensitive. The concentration should be different according to the weather, crop type, different growth period. We use the experience shows that the use of low concentrations within the effective range; spraying as long as plant stems and leaves spray wet, but not under the drip, do not re-spray; foliar spraying as possible foliar spray, do not soil spin, In order to avoid adverse effects on crops and soil in the following seasons; only once can be sprayed once. In order to facilitate the reasonable use of paclobutrazol for the majority of vegetable farmers, combined with our practical experience in recent years, collect and organize relevant information for your reference.