How to prevent fruit cracking in Feizixiao lychee? A detailed guide to practical control methods
How to prevent fruit cracking in Feizixiao lychee? Which methods work well? To prevent fruit cracking in Feizixiao lychee, you can refer to the following methods for control: 1. Root cutting and girdling: In the later stage of fruit development, using root cutting and girdling of the main branches to weaken root activity is very effective at reducing fruit cracking. But the measures must be timely and appropriate; if excessive...
How to prevent fruit cracking in Feizixiao lychee? Which methods work well?
To prevent fruit cracking in Feizixiao lychee, you can refer to the following methods for control:
1. Root cutting and girdling: In the later stage of fruit development, using root cutting and girdling of the main branches to weaken root activity is very effective at reducing fruit cracking. But the measures must be timely and appropriate; if root growth is controlled too much, it is detrimental to normal fruit development and to the rapid recovery of tree vigor after harvest.
2. Balance the supply of nutrients needed during fruit development: In addition to balancing the supply of the three elements nitrogen, phosphorus and potassium, timely supplement calcium, boron, zinc, copper and other trace elements, but excessive nitrogen supply will make the plant's vegetative growth too vigorous, and the root system's ability to absorb fertilizer and water will increase, leading to excessively rapid flesh growth.
3. Use plant growth regulators: Spray the fruit clusters with naphthalene acetic acid at 30×0.000001 during the flower bud stage or after flower drop, and before fruit coloring. If supplemented with foliar topdressing, fungicide spraying and bagging measures, the anti-cracking effect will be better. When the fruit is the size of a mung bean, spray the fruit with ethephon at 10×0.000001, and spray once more after 1 month, which can reduce fruit cracking. In the early stage of fruit cracking, spray the fruit clusters with ethephon at 80×0.000001 after the morning dew has dried, which can enhance peel elasticity, inhibit rapid flesh growth, make the peel soft, and reduce fruit cracking. At 15 days and 30-40 days after female flowers fade, spray cytokinin at 30×0.000001 on the young fruit, which can promote cell division and normal development of the peel and avoid fruit cracking.
4. Do a good job of pest and disease control: Damage from pests and diseases will increase the fruit cracking rate. In particular, fruit peel infected by downy blight is often the breakthrough point for peel cracking. Control should be carried out early, and fruit that has already cracked should be removed promptly.
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