Yellow leaves of fruit trees are generally caused by iron deficiency, and fruit trees in areas with high salinity or high limestone are more susceptible to disease. The disease started from young shoots on the new shoots, yellow veins were green. In severe cases, the top leaves of the new shoots are defocused. The treatment is as follows:
First, improve the soil in the spring or fall every year under the canopy to dig radial deep trenches, the application of neutral or acidic high-quality farmyard manure. After 3 to 5 years will change the pH of the soil to eliminate iron deficiency in fruit trees.
Second, trunk injection with 0.05% to 0.1% concentration of ferrous sulfate solution, with trunk syringe directly into the trunk of the xylem. Adult tree 500 ml per plant. This method is simple and effective.
3. After the leaf sprayed leaves have sprayed on the leaves, the young leaves are sprayed with 0.3% to 0.5% ferrous sulfate solution until the leaves are fully wet, which can effectively control the occurrence of diseases.
Fourth, the roots deal with the spring after freezing, in the trunk 1 meters away digging a circular pit, deep 30 cm, to expose the large lateral roots as well. Cut a shallow wound on both sides of the lateral roots, and pour 100 kg of the ferrous sulfate solution with a concentration of 20% to 30% (the amount of large trees) into the pit. After dipping for 30 minutes, cover the soil with a pit. This method works well for diseased fruit trees.
First, improve the soil in the spring or fall every year under the canopy to dig radial deep trenches, the application of neutral or acidic high-quality farmyard manure. After 3 to 5 years will change the pH of the soil to eliminate iron deficiency in fruit trees.
Second, trunk injection with 0.05% to 0.1% concentration of ferrous sulfate solution, with trunk syringe directly into the trunk of the xylem. Adult tree 500 ml per plant. This method is simple and effective.
3. After the leaf sprayed leaves have sprayed on the leaves, the young leaves are sprayed with 0.3% to 0.5% ferrous sulfate solution until the leaves are fully wet, which can effectively control the occurrence of diseases.
Fourth, the roots deal with the spring after freezing, in the trunk 1 meters away digging a circular pit, deep 30 cm, to expose the large lateral roots as well. Cut a shallow wound on both sides of the lateral roots, and pour 100 kg of the ferrous sulfate solution with a concentration of 20% to 30% (the amount of large trees) into the pit. After dipping for 30 minutes, cover the soil with a pit. This method works well for diseased fruit trees.
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