Pear fruit thinning is one of the key agricultural operations in pear production. Through fruit thinning, fruit setting can be controlled and the pear tree can be reasonably burdened. Under the condition that the pear tree is sure of the fruit, the earlier the fruit is thinned, the better, which can reduce the consumption of stored nutrients.
What problems should be paid attention to when thinning pear trees?
Start thinning when the large and small fruits are distinct. The thinning should be based on the variety, tree vigor, and the climate during the flowering period. The fruit with a high fruit setting rate should be carried out 10-15 days after the flower, and the varieties with a longer physiological fruit drop period are in the flower drop. The fruit can be thinned only after 20 days. Those with a large amount of flowers, a high fruit-setting rate, and weaker trees should be thinned early, and young trees and flourishing trees with less fruit should be thinned later.
In order to ensure the good growth of the extension branch and expand the crown of the young tree, the pears on the extension branch must be thinned out. When thinning the fruit, the diseased and insect fruit, the injured fruit, the deformed fruit, and the young fruit with slow growth and dull skin should be removed, and the young fruit with strong development should be retained. The inflorescence is counted from top to bottom, and the third or fourth fruit is the best in the fruit position. In principle, one fruit is reserved for each fruit stand, and each fruit should have 25-30 leaves.
At the same time, the fruit thinning should be around to facilitate the bagging operation to select the location of the fruit. After the fruit is thinned (within 30 to 45 days of blooming), applying plant growth regulators on the middle and upper part of the stalk can increase the size of the pear, improve the market, and increase the sweetness. For example, when applying "Liguoling", the temperature should be below 30℃, 3800～4500 fruits per 50g, and one third of pear fruits per tree, the whole tree has no effect.
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