2. Because litchi needs uniform water supply during the whole fruit development period, uneven water supply will affect the development of pericarp, which is not conducive to the later pulp growth, inhibits fruit development, and causes young fruits to dry up and fall off. In the case of drought, water should be used frequently to keep the soil moist. If the water-retaining agent has been applied in the early stage of flower promotion, it can be watered once every 1 month in case of drought.
3. On 30th and 40th days after female flowers wither, choose one of the following formulas to spray. 800 times of yandou compound fertilizer +0.2% potassium dihydrogen phosphate +0.3% matrine 2000 times; Bao Guo 800 times +0.2% potassium dihydrogen phosphate +0.3% matrine 2000 times.
4. About 50 days after female flowers wither, choose one of the following formulas for spraying. 1.0% Hero Bar 1500 times+1 100 million units npv "Qijin" 600 times +72% Jiahao 600 times+calcium amino acid 800 times.
5. 1.3% nongnianfeng 1500 times +50% anti-cracking fruit-keeping agent sterilized to 1500 times +800 times.
6. Spray with one of the following formulas 20~25 days before the fruit is ripe (when the fruit is red).
7.4.5% etomidate 1000 times solution +0.3% matrine 3000 times solution +72% Jiajiao 600 times solution+crack prevention and fruit protection 800 times solution;
8.0.3% matrine 1500 times solution +50% sterilized calcium 800 times solution+Bao Guo calcium.
9. In addition, girdling and girdling are also effective measures to protect fruits, especially in hot and humid weather, which is more effective for young trees bearing fruit and young trees growing vigorously. The majority of fruit farmers can choose to use it according to their actual situation.