After the apple tree is dropped from flowering to bagging, it is a key stage to improve the fruit quality, control pests and diseases, and increase production and income. Therefore, it is very important to manage well during this period. Specifically, the main tasks are as follows:
One is to complete quantitative fruit collection. Early fruit thinning and the preparation of reserve branches are a technical measure to save nutrition and increase fruit, and it is also of great significance for successive years of high yields. Generally, this work is done within 30 days after flowering to remove the tip fruit, back fruit, fruit, disease fruit, malformation fruit, frost fruit, rim fruit, etc., leaving the appearance of good, disease-free harmless As a result, the amount of fruit left in each tree ranges from 200 to 400 and the fruit spacing ranges from 20 to 25 centimeters.
The second is to seize the opportunity to use drugs three times to prevent and control pests and diseases. After the apple trees fall, with the increase of temperature, various pests and diseases have begun to occur or some of the diseases and insect pests may occur in large areas. Before the bagging is carried out, three drug applications are implemented, which can reduce the base number of diseases and insect pests.
The first medication should be sprayed once in 7 to 10 days after the insecticide and fungicides, mainly to control leafhoppers, aphids, leaf roller moth and early defoliation, ringworm disease, anthrax and other pests and diseases. When selecting the fungicide, according to the situation before flowering, if the germination period and the inflorescence separation period have been sprayed with fungicides and the effect is better, this time the use of drugs should be mainly protective agent, such as Xinwansheng, agricultural resistance. 120, etc.; If the germination period and the inflorescence separation period is not sprayed with fungicides or the effect is poor, this time we must spray to cure the main drugs, such as iprodione, boron Bao Bao, boron calcium treasure; Insecticide can choose "thousand knife" avermectin and so on.
The second medication was on the 10th to 15th days after the first medication. The main control was for aphids, red spiders, whitefly, apple leaf roller moth, cotton bollworm, gold thread moth, rotenia, and spotted leaf disease. Brown spot, powdery mildew and other pests and diseases. Optional multi-antimycin, Xin good, etc., this time when the drug, insecticides and fungicides alternate use of better results.
The third time is the use of drugs before bagging, mainly for the prevention and treatment of peach pests, aphids, leaf roller moths, gold moths, leafhoppers and other pests and black spot disease, anthrax and other diseases. On the day of the bagging or the day before, a protective agent and a systemic therapeutic agent and an insecticide may be sprayed, such as ten thousand, fruit, salt, Shiyue, and the like.
At the same time, during this period, special attention should be paid to the use of drugs: the use of drugs to disperse high, good suspension, good compatibility, irritant, and can not contain heavy metal ions, to prevent fruit rust; choose pesticides should be careful, must not The use of low-quality pesticides; mixed pesticides should be scientific; spraying should be meticulous and thoughtful, good atomization, so as not to produce phytotoxicity, affect the smooth surface of the fruit.
The third is to implement orchards between the orchards. The conditional orchard is recommended to grow grass in the orchard line. After the grass grows tall, it is covered with a cover. The thickness of the grass is 15-20 cm and the amount of mu is 1000-1500 kg. It can effectively increase the content of organic matter in the orchard soil and prevent the orchard soil and water. Loss, enriching the population of orchard insects, can also eliminate the cultivator weeding and save labor.
Fourth, scientific recovery of water and fertilizer to ensure fruit tree nutrition. After flowering, the cell division of the fruit is in its prime, and the fertilizer and water conditions are crucial to affect the fruit size and fruit shape. If the basal fertilizer is insufficient, the orchards that are not chased by spring fertilizers must be timely fertilized to increase tree vigor. Top dressing is based on Stanley's fourth element (20-5-23) nitrogen-phosphorus-potassium fertilizer, with Jiaguowuwu organic bio-fertilizer and Baononghai calcium. Wang soil modified fertilizer mixed use, can also be used "Gao Song" highly concentrated yellow humic acid liquid fertilizer, high-dimensional pure dew potash or "comfortable" series of water-soluble fertilizers, biogas slurry. In case of drought in this period, timely watering is needed to ensure soil moisture.
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