Grape Fruit Coloring & Uniformity
隐藏域元素占位
Grape Fruit Coloring & Uniformity
Application of Regulators for Grapefruit Coloring and Uniformity
S-ABA
In the early stage of fruit coloring, spraying the whole plant with 200-400 mg/L inotropin solution or spraying the fruit once can promote fruit coloring and increase quality.The optimum concentration of "Kyoho", "Red Earth", "Rose Fragrance" and "Beauty Finger" was 200-400 mg/L, the optimum concentration of "Xiahei" was 100-200 mg/L, "Teng Ren"" The optimum concentration of varieties is 400~500 mg / L. Be careful not to spray on grape leaves and branches.
Propyl dihydrojasmonate PDJ
- In the treatment of dipping the ear, in the grape color changing stage, spray the ear with 10-50 mg/L propyl dihydrojasmonate and the same concentration of methyl jasmonate twice, with an interval of 7 days. Anthocyanin content, reduce chlorophyll a and chlorophyll b content, improve fruit color, significantly increase fruit soluble solids and vitamin C content, promote the accumulation of total phenols and flavonoids in peel, and improve fruit quality.The overall effect was positively correlated with the concentration. At the same concentration, the effect of propyl dihydrojasmonate was better than that of methyl jasmonate.
- The whole plant was sprayed with 50 mg/L propyl dihydrojasmonate combined with 0.5 mg/L brassinolide for 3 times on 20 d, 30 d after flowering and 20 d before harvesting. The comprehensive effect of promoting grape coloring and improving quality can increase the sugar content and ripen 5-6 days earlier.
Ethephon
When the fruit begins to color, 300~700 mg/L ethephon is used to spray the cloth or dip the ear, which can mature for 4~11 days in advance, but ethephon has the side effect of falling off the fruit and leaves. 20 mg/L naphthalene acetic acid to eliminate or reduce shedding.
30%DA-6·Ethephon
When the fruit begins to color, on "Xiahei" grapes, dilute 1000~2000 times, spray the whole plant, and focus on spraying spikes; on "Jingya" grapes, dilute 250~750 times, spray the whole plant, focus on Sprinkling treatment; on "Kyoho" grapes, diluted 600-1800 times, and spraying the whole plant, can effectively promote fruit coloring.(Note: When mist mist machine is spraying, it is necessary to increase the amount of water added and reduce the use concentration.)
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