What to Do When Winter Jujube Turns White? Key Points of Control Techniques Explained

When winter jujube fruiting enters the white-ripening stage, management must be emphasized, as it affects the color and ripening of the jujubes in the later stage. Today we will briefly understand the key points of winter jujube turning white techniques.

Key points of winter jujube turning white techniques

1. When winter jujube turns white, the chlorophyll in the peel decreases, the base color fades from green to white, and the fruit enters the stage of rapidly accumulating sugar and dry matter. At this time, potassium fertilizer should be the main focus, and nitrogen fertilizer intake should be avoided to prevent the fruit from staying green and ripening late.

2. Watering should be controlled. Weak trees can be watered appropriately, but strong trees or ordinary trees should not be watered as much as possible, to avoid excessive watering causing delayed ripening.

3. During the period when winter jujube turns white, for girdling wounds that do not heal for a long time, timely treatment should be carried out. Cytokinin and gibberellic acid can be applied to the girdling wound, and then tightly bound with plastic film. For healed girdling wounds, whether to perform a second girdling depends on tree vigor. Generally, strong trees can undergo a second girdling, and the width is determined by tree vigor and must not be too wide. Multiple ring-cutting can be used.

4. When winter jujube changes color, foliar fertilization can also be carried out to increase the deposition of fruit components and promote color change.

5. For winter jujube trees planted in greenhouses, pay attention to cooling inside the greenhouse. Shading or splashing mud slurry can be carried out at noon.

6. In high-temperature and high-heat weather, jujube trees are prone to erosion by diseases and insect pests. In terms of diseases, the main ones are fruit cracking disease, anthracnose, and fruit shrinkage disease. Pyraclostrobin, prochloraz, thiophanate-methyl, tebuconazole, propineb, etc. can be used; insect pests are mainly red spiders, jujube wall lice, etc., and emamectin benzoate, abamectin, pyrethroids, and spirodiclofen, etc. can be used.

In short, when planting winter jujube, attention should be paid to scientific planting management, and during the white-turning period, water and fertilizer, girdling, and other aspects should be well controlled.