Apple root rot prevention method

Apple trees often have rot disease. As the roots are buried in the soil, when the initial disease and the disease are light, no diagnosis is found after the disease has been discovered or diagnosed. If the roots are weak, the tree vigor is weakened, the yield and quality are reduced, and the plant death is caused. The whole garden is destroyed. .

The main diseases of rot roots include apple root decay, white feather disease, and white feather disease. These kinds of rot, in the growing period of excessive rainfall, excessive water in the soil, poor drainage, soil compaction, organic matter is less, acidic and slightly acidic soil orchard occurs the most, planted too deep or too thick soil, damage the roots when farming Such as, easy to lead and increase the severity of the disease. The main methods of prevention and control are:

I. Strengthen cultivation management and create unfavorable conditions

1. Do a good job in drainage Before the advent of the rainy season, dig out the drainage ditch, eliminate water and excessive water in a timely manner, reduce groundwater level and soil moisture content, and avoid flooding.

2. Turning the garden fertilizing After the fruit is harvested, from September to October, deeply turning over the orchard, reusing the base fertilizer, using more complete fertilizer elements, containing more manure and green manure, improving the soil with poorly compacted soil as loose and fertile soil as quickly as possible. , In order to improve the rhizospheric soil water and gas heat, to create a good growth conditions for the root system.

3. Increase the lime-saturated orchard soil in the growing season, combine cultivating and weed control, apply appropriate lime, and adjust the pH of the soil to more than 6.5 to improve soil physical and chemical properties and create an environment that is not conducive to the aforementioned diseases.

4. The trees that need to be trimmed with too many flowers need to be sparse and sparsely fruitful, and carefully cultivated to protect the roots and root necks from injury, so as to reduce pathogenic invasion pathways and enhance disease resistance.

Second, timely treatment of diseased plants to prevent the spread of disease

1. When the ditching blockade starts with a diseased plant or a few diseased plants, immediately close the ditch with drip under the drip of the diseased plant and pour 5 degrees lime sulfur to prevent the diseased roots from coming into contact with the surrounding roots to prevent the disease from spreading.

2. Qing root disinfection Planer disc soil examination, the incidence of heavy, saw the roots completely rot, scraping the rot of the diseased skin and wood, picked up and concentrated burned. After scraping, the diseased area and surrounding soil shall be sterilized with 5 degrees lime sulfur or 1000 times root gram, benzene pyrocyanine, or sulfurous sulfur powder. If it is during the rainy season, it should be taken out of the air for 15-20 days. Cover with a disease-free soil to restore.

3. By replacing large roots with large rot, after clearing the roots, three rootstocks with well-developed roots are planted along the straight leg to establish a robust root stock. The root system of the rootstock replaces the function of the original root system in order to save dying plants and promote restoration of tree vigor.

4. The top-dressing tree with top-dressing roots, in the diseased period, due to serious impact on the absorption of nutrients, transport and up and down traffic, resulting in lack of tree nutrients, so in the new root growth after the above treatment, timely follow-up decomposed A quick-release human animal manure and appropriate amount of superphosphate to supplement nutrients and promote new root growth.

These diseases, in addition to harming apples, also harm fruit trees such as pears, peaches, plums, and cherries. The onset, symptoms, and regularity of these diseases are basically the same as those of apple trees and can be prevented and treated in the same way.

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