The latest four key points of citrus winter management

After citrus harvest, because the tree fruit consumes a lot of nutrients, it needs to replenish nutrition in time and restore the tree potential, and winter is also the key period for flower bud differentiation and overwintering of diseases and insect pests. So winter management is related to the high yield of citrus in the coming year and the basis of reducing diseases and insect pests. Let's take a look at the key points of citrus winter management.

1. Early application of base fertilizer

In order to differentiate citrus flower buds, improve flower bud quality, increase tree nutrition and improve frost resistance, base fertilizer must be applied early, fertilization can be applied one week after fruit harvest, and young trees must be finished before November. The earlier the fertilizer is applied and the higher the temperature, the faster the fertilizer will decompose and the more the tree can absorb, and the better the effect will be. At this time, fertilization is mainly organic fertilizer, with special fertilizer for fruit trees, using ring ditch and strip ditch method.

2. Clear the garden in time

The pathogens and insect sources that harm citrus survive the winter in litter, weeds and fruit drop, so at the beginning of winter, the disease and insect branches, dry withered branches, fallen leaves and fruits and weeds are cleared out of the orchard in time, burned or buried deeply. At the same time, it is necessary to cut off all the late autumn shoots at the end of autumn to prevent the extended growth of late autumn shoots and reduce the cold resistance of trees. If the soil moisture is too much, the root system is very easy to rot, so it can be combined with fertilization to open ditches and drain moisture, so as to avoid future management.

3. prevention and control of diseases and insect pests

After clearing the garden, from late November, stone-sulfur mixture is used for foliar spray every month, usually 3-4 times a month, which can effectively control overwintering anthracnose, mites, scale insects and other insect pests, effectively reduce the basis of diseases and insect pests, reduce the incidence of diseases and insect pests in the coming year, reduce the use of pesticides, and improve production efficiency.

4. Strengthen the prevention of theft

Freezing injury has a great impact on citrus tree body and next year's yield, so anti-freezing measures are very important, which can be prevented by trunk whitening or tree plate film mulching and straw. Tree trunk whitening can not only prevent freezing, but also prevent trunk diseases and insect pests. It can not only be made from 72% water, 22% quicklime, 3% stone sulfur mixture and 3% salt. Smear the trunk evenly. It is advisable not to flow down after painting and not to stick into a ball, quicklime must melt, otherwise it will absorb water and release heat and burn the tree trunk, and anti-freezing measures should be completed in early December.

The above is the introduction of the four key points of citrus winter management. I hope it can help you. If you want to know more about it, please follow us.