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化学物质对于防治植物霜冻具有潜在的应用前景。 一、生长调节剂 1.乙烯释放剂 秋季单用乙烯利或与其它生长调节剂混用,能提高桃、山茱萸和苹果的抗寒性,并具有延迟花期的效应。秋季施用CGA-15281[二氯-双(酚甲氧基)-硅烷]增强了幼龄苹果树的抗寒性,延迟了桃树花期。番茄在移植前12天喷施乙烯利,能提高发生霜冻时的存活率。 在许多情况下,药害往往抵消增强抗冻性和
Chemical substances for the control of plant frost has potential applications. First, the growth regulator 1. Ethylene release agent alone ethephon in autumn or mixed with other growth regulators, can improve peach, dogwood and apple cold resistance, and has the effect of delayed flowering. Autumn application of CGA-15281 [Dichloro-bis (phenolic methoxy) -silane] enhanced the cold resistance of young apple trees and delayed peach flowering. Tomatoes were sprayed with ethephon 12 days prior to transplantation to increase the survival rate in the event of a frost. In many cases, phytotoxicity often counteracts enhanced frost resistance and