During the hot and rainy season, the apple trees are at the peak of summer growth. With the increase of rain, the autumn shoots are prolonged and the fruits are rapidly expanding. There are five main management measures for this period:
First, the summer cuts the whole tree;
Second, the fruit is long-term scientific and reasonable topdressing;
The third is to spray foliar fertilizer to supplement the nutrients of the tree;
Fourth, the prevention and control of pests and diseases, especially for bagging fruits, to prevent leaf diseases and pests that damage branches and leaves;
The fifth is to do a good job in the prevention and remedy of natural disasters. The main technical measures taken by different tree species are described as follows:
First, continue to pruning in summer, and remove the dense branches and cross branches. As a result, a large amount of trees should be topped and hanged to prevent breakage and splitting. For the over-wan tree, it is necessary to control the growth and promote the formation of flower buds. From the early stage of autumn shoot growth, every 10-15 days, spray the paclobutrazol 150-200 times solution to the prolonged apple tree 2-3 times to control the autumn and promote the autumn. The flower buds are full.
Second, carry out foliar spray fertilizer. The foliar fertilizer with good effect is melon and fruit, and the micro-fertilizer of Qirui amino acid can be mixed with most alkaline insecticides and fungicides. It should be sprayed at least twice, and the interval is about 10 days.
Third, carry out the topdressing under the tree, generally apply 2-3 pounds of special fertilizer for fruit trees per 100 kg of fruit. For medium-maturing varieties, it is necessary to do a good job of pre-harvest anti-falling fruit. From the beginning of August, spray 30-40ppm naphthalene acetic acid solution.
When the rainfall is heavy, it should be drained in time to prevent the fruit trees from being soaked for a long time. On the occasion of the rainy season, you can apply powdered straw, wheat straw or wheat bran to the hole under the canopy, or cover the straw under the tree (note the soil erosion).
Fourth, the weeds with more weeds can be chemically weeded, spraying 10% of 10% glyphosate water per acre, 30-40 kg of water, adding a small amount of washing powder when spraying can improve the efficacy. When spraying the herbicide, be careful not to spray it on the leaves and fruits of the fruit trees to avoid phytotoxicity.
In addition, in recent years, brown spot disease has occurred severely in the Central and South Apple Orchard. It can be used alternately with Bordeaux mixture, such as benomyl, bactericidal, strong ring, and other endogenous fungicides. better.
5. This period is also a season where hail is prone to occur. After the hail attack, one is to remove the rotten fruit that cannot be retained, and spray the fungicide plus foliar fertilizer and new high-fat film in time to prevent the disease from increasing the nutrient supply. Promote wound healing. The second is that the branches are damaged by the hail and the skin is broken. The skin is peeled off and broken, and then sprayed with a new high-fat film. It can also be coated with 20-30 times of Guokangbao to protect the wound and restore vitality.
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