In chronological order, bagging period management can be divided into three parts: bagging, bagging, and bagging.
Before bagging
Mainly for the preparation of bagging, there are the following points of management:
1. The fruit separation interval is usually 20-25 cm, leaving a central fruit that is healthy, fruity, and basement less than 1 cm. Considering that this year's temperature is unstable, the phenological period is delayed, and the fruit setting rate is not high, it can be shortened appropriately. Fruit distance, but only one fruit per inflorescence. The end of May must be completed before the end of the first order, after the first inside and outside. It is best to use sparse fruit cuts for thinning fruit, so as not to damage the fruit shoots.
2. Summer scissors combined with fruit peeling to do a good job in summer. For azimuth, angle inappropriate, new shoots without space to be removed from the base in a timely manner. There is space for new shoots to grow to about 15 cm when the tip or take the branches softened to reduce vegetative growth and promote reproductive growth. New growth can be controlled using chlormequat.
3. Pest prevention and control Pest prevention before bagging is the key to annual prevention and control. It is necessary to ensure that no insects and sterile fruits are put into the bag. The pests and diseases in this period mainly include brown spot disease, lutetic disease, spotted defoliation disease, powdery mildew, red spider, gold-grained moth, blind stink bug, Kang's whitefly, apple yellow peony, spiraea philadelphia and so on. It is advisable to use R & F Bank 4000 times + Mongtime 5000 times before the second round of bagging. The last time before bagging, the drug was used to take the enemy stable 6000 times + avermectin 2000 times + imidacloprid. Note: The waxy layer on the fruit surface before bagging has not yet formed and is quite sensitive to external stimuli. Therefore, be cautious when using medicines to avoid the use of drugs containing copper, sulfur, chlorine, and manganese ions. It is best to use suspending agents, water agents, and microemulsions. Other safe dosage forms to avoid phytotoxicity. In addition, the last spraying should be tightly combined with the bagging, such as raining after spraying or the bagging interval is more than 5 days.
4. The trace spraying of trace elements before the supplement of the trace elements is very necessary, and can be directly added to the fruits. The effect is good and the speed is fast. Combination of pest control can be added to the first two times before bagging Ruipei 5000 times, can prevent red and black apple disease and a variety of nutrient deficiency, significantly improve the quality of fruit. The last time before bagging, 3000 times of adding Riparel calcium or Ferro calcium (taking care to avoid high temperature) can effectively prevent bitter pox disease and the occurrence of cracking in the later period (this period is the critical period for calcium supplementation by Apple). If you join the home Yiwei 2000 times can speed up the speed of young fruit expansion.
Bagging
The time is to be completed within 30-45 days after the fall, and it is best to avoid operating in stormy weather from 8 am to 11 am and 15 am to sunset. If there is dew or liquid on the surface, wait until it has completely dried. When bagging, take a fruit bag, open the mouth of the bag, hold the bag under one hand, tear the paper cut out of the bag with another hand, and extend the bag into the bag, and squeeze the two corners of the bag to make the two The vent holes in the bottom corners open, and the entire fruit bag bulges into a ball. Then, hold the handle in one hand, hold the fruit bag in one hand and insert the young fruit into the bag from the bottom up. The handle is placed in the cut in the middle of the bag so that the fruit is in the middle of the bag. Finally, the bag mouth is folded 2-3 fold, and the one with the iron wire is placed on the outermost side. The wire is pulled horizontally and folded, and fixed on the result branch or the backbone branch. Make sure that the young fruit is in the upper middle of the bag and does not come into contact with the bag wall to prevent scratching the fruit surface. The tightness of Zhass should be moderate. The tightness of Zhass will affect the development of young fruit. If Zhasila is too loose, it will cause rain or liquids to flow into fruit bags.
After bagging
After the fruit is put into the bag, pest control cannot be eased. It is necessary to spray the Raritan library 4000 times + avermectin 2000 times + enemy killed 1000 times after 10-15 days of bagging. In addition, after entering the peak of apple root activity in June, in addition to the expansion of young fruit and the growth of new shoots requiring a lot of nutrients, but also facing flower bud differentiation, the need for a large amount of fertilizer, such as the supply will not affect the growth, resulting in fruit drop, premature aging. Fertilizers should be dominated by nitrogen and appropriate amount of phosphorus and potassium fertilizers, which can be applied to 45% content compound fertilizer 100 kg/mu, second generation of prebiotic bacteria fertilizer 10 kg or beneficial micro-bacterial agent 500 g/mu. The method of fertilization uses multiple acupoints. According to soil moisture, flexible control of orchard watering.
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