In the northern part of the country in July and August, in the case of heavy rain and high temperatures, if the fruit trees are not properly managed, it is easy to cause long-term growth. It is necessary to strengthen artificial regulation and control, mainly to do the following work:

Fertilization pruning control

Fertilize. If the application is low or not, the phosphorus and potassium fertilizers should be properly applied to the trees with weak results and weak growth. At the same time, the whole plant should be sprayed with 300 times of potassium dihydrogen phosphate, sprayed once every 15 days, and sprayed continuously for 3 to 5 times.

Summer shears. Timely clean up the dense branches, weak branches, long branches, timely picking, in order to facilitate ventilation and light transmission, while controlling the branches with less results, growth and prosperous branches. After trimming, apply the callus anti-corrosion film to the trimming mouth to disinfect and cure the wound and protect the wound.

Chemical control. Plant growth balancers and retardants should be used as appropriate with little or no accelerator. The method is: ring cutting in the tender part of the trunk or the main branch, the depth is just to reach the xylem, and the smear is applied to the Huanhua No. 2 (except the peach tree) to control the crown to prevent the size of the year.

Combining weeding and cultivating

In the rainy season, weeds grow very fast. Not only do they compete with fruit trees for water and fertilizer, but also places where pests and diseases are hidden. It is necessary to cultivate alfalfa in a timely manner. It is also possible to use herbicides such as naps, paraquat and glyphosate. In addition, after heavy rain, the surface of the surface, the soil moisture is high, oxygen is insufficient, which is not conducive to root growth, often causing poor growth of fruit trees, and even causing a large number of fallen leaves, so whether or not weeds, we must do a good job after rain, can improve Soil permeability can maintain soil moisture.

Discharge and combination of flood control and water saving

A lot of precipitation in time, although it is inconvenient for production management, it has accumulated rainwater. In the northern region, the annual precipitation distribution is very uneven. In order to use the rainwater resources, the reservoirs can be dug in the orchard, and the clear water can be used to clear the water. In recent years, the drought in North China has a weak awareness of flood control. In the past, many drainage ditches have been abandoned and filled, and when precipitation is concentrated, it is prone to internal hesitation. While storing water, don't be numb, do a good job in preparing for disaster prevention, and clear the drainage ditch around the orchard. In case of continuous precipitation, the park will be discharged in time.

Strict prevention of pests and diseases

The rainy season is the peak period of fruit tree disease. Therefore, strengthening the prevention and control of diseases in the rainy season is a key link in the management of fruit trees.

Apple ring disease. Apple ring disease is overwinter in diseased stem stem tumors with hyphae, conidia and ascospores. Spores in the rain, peaked from July to August. In the rainy season, chemical control is mainly used. Generally, 40% anthrax fumei wettable powder 400 times liquid is used; 50% carbendazim wettable powder 1000 times liquid has good control effect.

Apple anthracnose. At the beginning of the disease, light brown round spots appear on the fruit surface and gradually enlarge into brown or dark brown lesions. Prevention and control should be based on the removal of bacterial sources and enhanced cultivation management. Pay attention to the orchard drainage during the rainy season, and the diseased fruit should be removed in time during the growing season. The protection of the medicament generally adopts 1:2:200 Bordeaux mixture; 50% of the antibacterial WP of 500% to 600 times; 80% of the anthrax WP of 600% to 600 times.