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一、产生药害的原因①应用浓度过大乙烯利在黄瓜上应在黄瓜有3-4片真叶时喷施,使用浓度为3000倍液以上。如果黄瓜苗龄大,应用浓度过高,易受药害。防落素以正常用量蘸番茄花、茄子花,如应用时不做标记。反复多次重复蘸,相当于应用浓度过大,同样会产生药害。②环境温度影响施用植物生长调节剂应在一定温度范围内进行。应用浓度也应随着温度的变化做相应的调整。高温时应用低剂量。低温时应用高剂量。否则,高温时用高剂量,则易出现药害,而低温时用低剂量,又达不到增产效果。防落素在番茄上应用,即使在正常用量下,气温低于15℃或高于30℃都易产生药害。低温时易使番茄脐部形成乳突状药害,高温时则形成脐部放射状开裂药害。一般蘸花保果类调节剂里含
First, the reasons for injury caused ① application of excessive concentration of ethylene in cucumber cucumber should have 3-4 true leaves when spraying, the use of a concentration of 3000 times above. If cucumber seedling age, the application of high concentrations, susceptible to injury. Anti-pigmentation with normal dosage dip tomato flowers, eggplant flowers, such as the application does not mark. Repeatedly repeated dip, equivalent to the application of concentration is too large, the same will have injury. ② the impact of ambient temperature Plant growth regulators should be carried out within a certain temperature range. Application concentration should also be adjusted as the temperature changes. Use low doses at high temperatures. Low temperature application of high doses. Otherwise, high-temperature high-dose, then prone to injury, and low-dose low-temperature, but also fail to increase production. Application of anti-down factors in tomatoes, even in the normal amount, the temperature is below 15 ℃ or above 30 ℃ are prone to injury. Easy to make when the low temperature of the umbilical form of papillary traumatic injury, the formation of high-temperature umbilical radial tear injury. Generally dipped in flower conditioner regulator containing