Citrus gummosis is a disease that is difficult to control, but there are methods. Let’s take a look at the prevention and treatment methods of citrus gumming disease that I carefully recommend for everyone. I hope it will be helpful to you.

Methods for preventing and controlling citrus gumming disease

Method 1: Apply as much bio-organic fertilizer as possible to citrus, less nitrogen fertilizer (urea), and more phosphorus and potassium fertilizer.

Method 2: If there is water accumulation in the citrus orchard, deep ditches should be dug in time for drainage.

Method 3: If you find a fruit tree with citrus gumming, first scrape off the rough skin of the diseased part (green is suitable), then make several longitudinal cuts deep into the xylem, and then apply Bordeaux liquid + thiophanate +?Tree Protector General?, sterilizes and disinfects, so that the lesions will fall off quickly and the wounds will heal.

Method 4. If the citrus gumming disease is serious, you should use coating and irrigation methods to control it. You can use 1000 times Bordeaux essence or a self-prepared 0.6% Bordeaux liquid to irrigate the roots. The amount of water depends on the age of the tree. : One barrel for large trees and half for small trees.

Method 5: Foliar pesticides can be used to prevent and treat citrus gummosis. Foliar pesticides are mainly used for prevention, and it is best to use pesticides before the onset of disease. Agents include: triethyl aluminum phosphate, metalaxyl and manganese zinc. For deciduous fruits, use: "new high-fat film" + insecticide + fungicide spraying. Use 3 times in a row to achieve better results.

Method 6: Take cold protection measures for citrus trees in winter, such as whitening the trunks, cultivating the soil in winter, and applying organic fertilizer once after the citrus harvest, which can keep warm and prevent cold. Combined with pruning, remove diseased and insect-infested branches, dead branches and leggy branches, so that the orange trees have good ventilation and light transmission and reduce the incidence of disease. Apply "Healing Preservative Film" promptly after pruning to seal the wound and allow the pruned opening to heal healthily.

Citrus planting methods

1. Planting good varieties and disease-free strong seedlings

Choosing good varieties and planting strong seedlings are the basis for efficient citrus cultivation. Therefore, we must attach great importance to the propagation and management of seedlings, guide and standardize the breeding of seedlings with the four high requirements of "high starting point, high technology, high quality, and high standards", adopt advanced virus-free seedling propagation technology, and cultivate virus-free varieties. Strong seedlings lay a good foundation for efficient citrus cultivation.

2. Orchard planting

Orchard construction is to provide suitable growth conditions such as light, heat, water, air, and fertilizer for citrus production, and to provide a good environment for high yield and high quality of citrus. conditions and traffic conditions to reduce production costs and improve production efficiency. Build necessary roads, community divisions, drainage and irrigation, water storage, windbreaks, fertilizer sources and ancillary facilities. Fast-growing tree species are selected for windbreaks and are free of contagious diseases and insect pests associated with citrus.

3. Planting

The planting density of citrus varies in different countries, different periods, different citrus types, and how to prevent and control yellowing citrus trees. In countries such as my country and Japan, the planting density is relatively high, and now compared with the 1970s and 1980s, the density is getting smaller, and the density is tending to a reasonable density. In terms of planting methods, there are rectangular, square, triangular, wide and narrow rows and equal height planting. In terms of growing methods, citrus can be grown year-round, but mainly in autumn, spring, and summer.

4. Soil, water and fertilizer management

Soil management is the basis for the growth and development of citrus trees. Creating soil conditions such as fertilizer, water, air and heat suitable for tree growth and fruiting is the goal of soil management. To achieve this goal, deep plowing and application of organic fertilizers, green manures, intercropping, soil covering, cultivating and Measures such as maintaining water and soil can keep the soil in good fertility and optimal structural condition.

5. Plastic pruning management

Pruning and pruning of citrus is to form and maintain a reasonable tree structure, make full use of light energy and space, and achieve early fruiting, early high yield, For the purpose of stable production, high quality and high efficiency, pruning or other similar operations are carried out directly on the tree body. In the final analysis, shaping is to modify the tree shape to form an ideal tree structure; pruning is a branch processing technology directly carried out on the tree, such as thinning, shortening, retraction, topping, spreading buds and branches, and bending branches. , circumcision and root cutting, etc.

Shaping and pruning are interdependent and complementary to each other. To cultivate and maintain a good tree shape, it must be achieved through a series of pruning treatments; without reshaping the plant, it is difficult to perform reasonable pruning. Plastic pruning runs through the entire life cycle of citrus, but has different emphasis at different stages of development. Young trees are mainly reshaped, while adult trees are mainly maintained through various pruning techniques to adjust the tree shape and adjust the contradiction between vegetative growth and reproductive growth to achieve the purpose of extending the economic life of the tree.

How to fertilize citrus well

Symptoms of nitrogen deficiency in citrus:

When nitrogen fertilizer is insufficient, as the amount of nitrogen fertilizer increases, the sugar content gradually increases, but when the amount of nitrogen fertilizer increases, the sugar content gradually increases. If it is too much, the sugar content will decrease instead. Acid content is exactly the opposite of sugar content. Excessive nitrogen fertilizer will result in high acidity.

In the past, orange orchards that were continuously cultivated with multiple fertilizers would usually show better coloring, smoother skin, lower acidity, and improved quality within a year if the amount of fertilizer was reduced. However, due to continuous weight loss, the orange trees were nutritionally deficient. , will cause tree vigor to weaken, yield to reduce, annual fruit size and quality to decline. Floating skin usually occurs more with more nitrogen fertilizer. Regarding the coloring of the peel, if the amount of nitrogen applied is insufficient, the color will change quickly, but the color will be light; if the amount of nitrogen applied is excessive, the color will be thick, but some green will remain.

Symptoms of phosphorus deficiency in citrus:

Phosphorus has a good effect on the differentiation of citrus flower buds, fruit quality, especially acid reduction. When phosphorus is lacking, orange trees will grow poorly and their quality will decrease. Therefore, application during phosphorus deficiency can improve fruit quality.

Applying phosphorus fertilizer when there is no shortage will hardly increase the phosphoric acid content of the tree, and it is difficult to see the effect on the growth and development of citrus and the quality of the fruit. If there is too much phosphorus, it will hinder the growth of fine roots, reduce the absorption of nitrogen, and cause a lack of trace elements such as copper and zinc.

Symptoms of potassium deficiency in citrus:

Citrus with potassium deficiency has thin and smooth peel, low acidity, small fruit size, and low yield. If the application of potassium is increased, the fruit will become larger and the yield will increase. However, if it is too much, the fruit will be large and coarse-skinned, with poor quality.

Symptoms of trace element deficiency in citrus:

Symptoms of deficiency or excess of trace elements such as zinc, magnesium, and manganese can be manifested in the fruits and leaves, and affect the growth and development of tangerine trees. If the quality decreases, it can be administered once a year according to the symptoms of deficiency.

The effect of organic fertilizer application on citrus

The main period for applying organic fertilizer is autumn. If the application period is delayed until spring, nitrogen fertilizer will be released gradually, and there will still be a large amount of nitrogen fertilizer during the fruit expansion period. If there is excess nitrogen fertilizer, the growth of new shoots cannot be stopped and the fruit quality will decrease.