- Sep 06, 2018 -
1. Processing of grafting of plum trees.
Sodium Nitrophenolate：For the treatment of the cuttings, the treatment of sodium nitrate was 2-6mg/L. When transplanting, 0.9-1.2mg/L can be used to spray the seedbed; After transplanting, 1.5-2mg/L sodium nitrate was used to spray the seedlings.
2. Prevent the late frost damage and reduce the falling fruit
(1)Gibberellic acid：In the condition of continuous wet rain, the spraying of 20mg/L in the flowering stage and the spraying of gibberellin by 50mg/L at seedling stage can reduce the fruit drop.
(2)Paclobutrazol: The multi-effect azole of the young tree in the new shoot was sprayed with the drug of 1000-2000mg/L, which could inhibit the growth of the new shoots and reduce the fruit drop.
(3)Qingxin liquid: The plum blossom is early and vulnerable to late frost damage. During the growth stage of the plum tree, the spraying of qingxin liquid with 500-2500mg/L can be delayed for 4-5 days.
3. Increase the fruit rate.
(1)Diethyl aminoethyl hexanoate (DA-6): Fresh amine ester in the beginning of flowering and fruit setting and fruit enlargement period after the spraying a 8-15 mg/L of DA-6, can improve fruit-set rate, fruit growing fast, uniform size, increase the weight, sugar, acidity, increase in resistance, early maturity, increase production.
(2)Forchlorfenuron CPPU: KT-30 is used for 10d after flowering, with 5mg/L of KT-30 spraying, which can increase the yield of single fruit by about 60%.
(3)Sodium Nitrophenolate: In the 20 days before the flowering, the sodium nitrate was sprayed with 3-6mg/L of the sodium nitrate, and every 7 days, the fruit rate was increased.
4. Improve the fruit quality and ripening of the fruit.
Ethephon: The improved fruit quality of some plum varieties can be sprayed 50 to 100mg/L at 50%. The ripening of most plum cultivars can be used in the first one month before the fruit ripening, and the spraying of 500mg/L of vinyl is obviously ripening.