Summer is the period of maximum growth and fastest growth of pear trees in a year, and it is also the period when pear trees are most affected by external conditions. During this period, pear trees have higher requirements on fertilizer and water conditions, and are vulnerable to pests and diseases. The level of management will have a significant impact on the yield of pear trees and the quality of fruit.
Soil and fertilizer management
Fertilizer management. In July, after the early maturing varieties were harvested, a quick-acting Nitrogen Fertilizer was applied immediately to supplement the nutrient deficiency caused by the results. For mid-late maturing varieties, phosphorus and potassium fertilizers should be applied once at this time. In August, it is generally no longer fertilized, and only after the fruit is harvested, a quick-acting nitrogen fertilizer is applied. After fertilization, water should be properly irrigated according to the soil conditions.
Soil management. Summer temperatures are high, soil moisture is high, and weeds are prone to occur. Usually after the heavy rain or after the water, it is necessary to loosen the soil in time.
Pest Control
Young fruit period. Mainly control rust, black star disease, ring disease and pear hibiscus, pear birch, pear net è½, pear small heartworm.
Control measures: artificially remove the pests, diseased shoots, and deep burial; spray 80% spray 800 times liquid, 30% compound carbendazim 500 times liquid, can prevent rust and other diseases. Spraying 10% quenching emulsifiable concentrate 2500-3000 times liquid to control pests such as P. sinensis, and when the insect pests occur heavier, 10% imidacloprid can be sprayed. Be careful not to use Bordeaux solution after 40 days of fruit setting to prevent fruit rust from occurring.
Fruit enlargement and maturity. During this period, it mainly prevented black spot disease, ring disease, rust and heartworm, boat-shaped caterpillar, and rust tick. Disease control can be sprayed with 80% spray 800 times liquid or double volume Bordeaux liquid 200 times liquid; pest control can be sprayed with 10% quenching emulsifiable concentrate 2500 ~ 3000 times liquid or 30% Tao Xiaoling 200 times liquid.
Summer pruning
The purpose of summer shearing is to control the growth of the tree, promote the flowering and improve the ventilation and light transmission conditions of the tree. The normal result tree strictly controls the dense branches and the prosthetic shoots on the back and periphery of the backbone branches. Comprehensive application of topping, folding, branching, pulling branches and other methods to adjust the branches and angles of the backbone branches. In order to promote the formation of flower buds in the leap year, in the middle and late May, the main side branches or raising branches of the young trees can be circumcised.
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