Orchard timely calcium supplementation reduces acne spot disease
In the case of nitrogen fertilizer application, phosphorus and potassium fertilizers are used less, and the bagging orchard with strong tree growth is prone to fruit plaque disease. In the orchard that did not spray calcium in time in the early stage, it is necessary to spray 2 to 3 times of calcium nitrate, amino acid calcium or other calcium fertilizer in time from June to August to prevent the occurrence of acne spots and promote the internal quality of the fruit, and produce fruits with high calcium content. .
Controlling nitrogen and increasing phosphorus to improve fruit quality
Excessive application of nitrogen fertilizer may cause poor fruit coloration, reduced sugar content, rough meat quality, low fruit firmness, and many physiological diseases during storage. Therefore, it is necessary to control nitrogen fertilizer in orchards with high fertilizer and water conditions, and generally control the nitrogen application rate of fruit trees. It is advisable to increase the nitrogen nutrient level of the tree slightly below or slightly limit the yield. Appropriately increase the application of phosphorus and potassium fertilizer, and apply 0.5~1 kg of phosphorus, potassium fertilizer or foliar spray to 0.2~0.3 for the bag planting orchards with more results. % potassium dihydrogen phosphate can increase the coloration of the fruit, increase the fruit, and increase the sugar content and quality of the fruit.
Improve lighting
In summer, the summer shears should be strictly carried out, and the branches, dense branches, extra large branches and new shoots should be properly removed to improve the ventilation and light transmission conditions of the orchard.
Strengthen pest control to prevent leaf diseases and insects
(1) Do a good job in the prevention and treatment of early defoliation in apples. Use 70% Antaisheng 600 times solution +43% Hao Like 4000 times solution, Bideley 600~800 times solution, Jian Litong 1000 times solution, 50% antibacterial WP 600 times solution, 80% spray wettability Powder 800 times solution, 80% Dasheng wettable powder 800 times solution, and mancozeb 600~800 times solution are used alternately.
(2) Do a good job in the prevention and control of apple tree rot. From May to July, the lesions were completely scraped off, reaching the xylem, and scraping the skin around the lesion 0.5-1 cm, and brushing the trunk and backbone branches 1 to 2 times with 45% Schnein 100~200 times.
(3) Do a good job in the prevention and control of apples. It is treated with 48% lesbian cream 1000~2000 times liquid, 10% imidacloprid wettable powder 2000~2500 times liquid, annihilation phosphorus 3000 times liquid and other chemicals.
(4) Strengthen the prevention and control of red spiders. The control agent is 2500~3000 times of sputum death, 1500~2000 times of Nissolang, 3000 times of 哒螨çµ, and one of them.
Check vents to prevent black spot disease
Black spot disease and sunburn are closely related to poor ventilating holes. In dry or rainy years, it is often necessary to check the vents of the bag and check it once every 15 days or so. If the vent hole is blocked or sealed, When opening, use a pair of scissors to open the vent.
Rational irrigation
Improper water supply will also affect the coloration of the fruit; excessive rain, or flooding of large water, often cause new shoots to grow, especially the autumn shoots are long and cumbersome, consume a lot of photosynthetic products, and are not good for sugar and coloration of fruits. Rational irrigation of the orchard during drought has the effect of promoting fruit coloration.
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