What should we pay attention to in managing apple trees in summer?

What should we pay attention to in managing apple trees in summer? Please introduce apple trees in summer to pay attention to the following points: first, avoid thinning branches and overweight. Excessive branch thinning can easily stimulate the medium and short branches that have stopped to germinate and grow again, and due to the thinning of a large number of leaves, it weakens the ability of photosynthesis, which is not conducive to nutrient accumulation and flower bud formation. The amount of thinning branches should be based on the projected area under the tree, and the flower shadow coefficient should be kept at about 30% after thinning. Second, it is not scientific to pull branches. If the angle of the branch is too large, it is easy to make the tree too fast and weak; if the angle is too small, it can not ease the tree potential and promote the short branch. Therefore, pull, hold, twist, stroke and other methods should be used to open the base angle and waist angle, maintain the level of branches, and prevent the formation of "bow back" and strip. Three taboos twist a series of pieces. Twisting the new shoots on the back to the end will not only affect the light, but also easily lead to too many branches. For more than 25 cm of space, the upright shoots on the back, twist the shoots in the semi-lignified part of the base (5 cm at the base), and remove the rest. Four taboos are blindly short. Short cut (re-coring) overweight will promote branch growth again, affect the ventilation and light transmission of the tree, resulting in poor flowering effect, should be used less. Practice has proved that cutting short (re-picking the heart) at the junction of spring and autumn shoots can promote the growth of medium and short branches and the formation of flower buds. Five avoid laissez-faire ring peeling. Avoid arbitrary ring peeling regardless of variety, branch potential, water and fertilizer and other conditions. The width of girdling is generally 1 / 10 of the diameter of the peeled branches, and bandaging and other methods should be used to protect the wound to ensure that the peeling mouth of the ring is healed for 25 to 30 days. Six taboos to relax prevention and control. We must not think that everything will be all right after bagging, and we should choose pollution-free and low-residue pesticides to do a good job in the prevention and control of early deciduous disease, golden moth, mites and other diseases and insect pests. Pay attention to the interval between the use of drugs and rotate the use of drugs. Click to get more apple tree planting techniques click to get more fruit planting techniques