Reasons for Flower and Fruit drop of Litchi

Many fruit trees will have the phenomenon of falling flowers and fruits, which will seriously affect the economic benefits. Litchi is one of our favorite fruits, and it will also drop flowers and fruits when planting. So what is the reason for litchi falling flowers and fruits? Let's take a look at the detailed introduction.

1. Physiological drop of flowers and fruits

There are many varieties of litchi, but generally speaking, there will be 3-4 physiological peaks, and the mechanism of each peak is relatively consistent. The first peak period is mainly due to poor pollination or more male flowers, while the second time mainly occurs in the young fruit, which is affected by the endosperm development because of poor fertilization, and the young fruit stops growing; while the third time is usually in the fruit expansion period, when the fruit growth needs a lot of reasons, resulting in undernourishment of the tree resulting in flower drop. The fourth time generally before harvest, the fruit is completely tree body, the stalk is old and loose, resulting in fruit drop.

2. Climatic reasons

During the flowering and fruiting stage of litchi, external climatic conditions such as light, temperature, humidity and rainfall will affect the normal growth, such as high or low temperature, long-term rainy days, lack of light, etc., will affect its yield and quality, and increase the probability of falling flowers and fruits. In addition, bad climatic conditions will also affect the quality of pollination at flowering stage, resulting in falling flowers and fruits.

3. Lack of nutrition

There is a great demand for nutrients in litchi flowering and fruiting stage. if there is no nutrition at this stage, it will lead to a large number of falling flowers and fruits. Therefore, it is necessary to do a good job in fertilizer and water management before flowering and fruit setting, and replenish nutrients and water in time. If there is a phenomenon of falling flowers and fruits due to lack of nutrition, it can improve the measures of foliar fertilizer spraying and supplement plant nutrients, and the effect is better.

4. Hormonal causes

In the flowering and fruiting stage of litchi, the plant contains hormones that promote its growth and development, and the increase of these hormones will inhibit plant growth and promote litchi fruit setting rate. On the contrary, the reduction of these hormones is extremely prone to the phenomenon of falling flowers and fruits.

5. Diseases and insect pests

The flowering and fruit stage of litchi is also a period of high incidence of diseases and insect pests, so preventive measures must be taken at this time. If the prevention and control of diseases and insect pests are not timely, it is extremely easy to have serious flower and fruit drop, and in serious cases, the yield will be reduced by more than 50%, which will do great harm.

The above is the introduction of the reasons for litchi falling flowers and fruits. I hope it can help you. If you want to know more about it, please follow us.