Preventive measures of empty shell fruit of longan

Longan is one of the fruits that we are familiar with. When longan is produced, it is easy to produce shell without meat and can not be expanded, which seriously affects the yield of longan and causes inestimable economic losses to fruit growers. So how to prevent the occurrence of empty shell fruit in longan? Let's take a look at the detailed introduction with the editor.

1. Increase application of boron fertilizer

The main reason for the production of empty shell fruit is the lack of boron in the plant, which will affect the treatment of pollen, hinder pollination and fertilization, and finally form empty shell fruit. Therefore, for this situation, it is necessary to maintain boron fertilizer in time at the flowering stage of the plant, and there are two ways to supplement boron fertilizer. One is to add an appropriate amount of borax when applying base fertilizer, generally 1-2 kg per mu, or before flowering. Apply 50-100 grams of borax per plant. Another kind is extra-root fertilization, that is, spraying foliar fertilizer at the flower bud stage, dissolving borax in water, making a very low concentration of borax solution, spraying on leaves or buds, can quickly replenish plant boron.

2. Artificial pollination

Poor pollination and fertilization is also one of the main reasons for longan empty shell fruit, for this situation, it is necessary to carry out artificial pollination, artificial pollination time is best chosen at 7-10:00 in the morning. First of all, collect the pollen of male flowers, add 50-100 grams of pollen to every 50 kg of water, add 50-100 grams of white sugar, stir fully, and spray it evenly on the open female flowers. The excellent pollination effect can be achieved by spraying continuously for 3-5 days. When pollinating in low temperature, cloudy and rainy days, we should pay attention to shake off the moisture of the branches, and the best pollination effect can be achieved by spraying pollen solution.

3. Spraying hormone

In the period of young fruit expansion, the pulp can not be expanded normally due to some reasons, so the phenomenon of empty shell fruit appears. Can be in the young fruit is still in the size of soybeans, just appeared when the core, then spray 920 aqueous solution, generally every 50 kilograms of water to add 920 powder 1 gram. Spray it evenly on the branches, leaves and young fruit, which can stimulate the pulp development of longan and promote the rapid expansion of young fruit so as to avoid empty shell fruit. It can also be used with foliar fertilizer spraying for better results.

The above is the introduction of longan empty shell fruit preventive measures, hope to help you, want to know more related knowledge, please follow us.