The latest course of techniques and methods for flower and fruit protection of litchi

Litchi blossom and fruit will be affected by a variety of factors, generally internal causes have their own physiological fruit drop, external causes are weather, environment, nutrition, water and other factors. But no matter what the reason, as long as it is to maintain the good state of litchi blossom and fruit, it is necessary to learn some technical measures to prevent and regulate it.

1. Fertilizer application

Fertilization in the late flowering area provides flowering nutrition, generally opening a ring ditch under each plant to apply about 1 to 2 jin of high-efficiency compound fertilizer, and spraying 0.2% magnesium sulfate on the leaf before flowering. In addition, some branches can be pruned during flowering, and bees can be raised in the orchard to increase the success rate of pollination and fertilization.

two。 Temperature control

If you suddenly encounter low temperature to reduce the concentration of flower thinning agents, if it rains at low temperature all the time, you can spray growth regulators to slow down the flowering process. If you suddenly encounter high temperature, you should spray some water to the flowers to prevent water loss. Bees can be kept in orchards to increase the success rate of pollination and fertilization.

3. Flower protection

When entering the flowering stage, it can be used to adjust the flowering balance by foliar spraying of 2mai 4murd and paclobutrazol. After flowering, you can cut off part of the spike, and then remove the leaves near the spike to avoid competing for nutrients.

4. Fruit protection

Generally speaking, topdressing is needed before each physiological fruit drop, using compound fertilizer, less nitrogen fertilizer, mainly phosphorus and potassium fertilizer, and foliar spraying some phosphorus and potassium fertilizer can be absorbed quickly. In case of drought, it is necessary to irrigate in time to ensure the moisture of the tree and avoid losing water and falling fruit. Ring cutting and accumulation of nutrition can also be carried out at the initial stage of fruit to ensure the supply of nutrition to the fruit. In addition, the simplest and fastest way is to spray growth regulators, usually spraying gibberellin during the expansion period or spraying gibberellin a month behind the female flower.

5. Disease prevention

Mainly to prevent downy mildew, anthracnose, litchi bugs, stem borers, spray some mancozeb or Baitai before budding to prevent. Trichlorfon and other pesticides are used alternately to control pests during the flowering and fruiting period.

The above is about the specific measures of litchi flower and fruit protection. I hope these contents will be of some help to you. If you want to know more about litchi, you can pay attention to our follow-up updates.