Pear tree after fruit management

After the pear fruit is harvested, it is necessary to strengthen management and increase tree vigor to ensure that the pear tree buds are full and lay the foundation for next year's high yield.

First, after fertilization and root picking, fruit trees should be harvested for fruit tree conditions, the size of the canopy, and how much fruit should be harvested. Fertilizer is mainly farmyard manure, with appropriate amount of compound fertilizer for fruit trees. Fertilizer amount should not be too large, should not apply fertilizer urea or ammonium bicarbonate, or easily extract a large number of late autumn shoots, affecting flower bud differentiation. The application of basal fertilizer is generally based on the application of pounds of kiwifruit, and is mainly based on delayed organic fertilizer, and a small amount of quick-effect fertilizer can be added. Can dig a circular, curved or rectangular fertilization ditch, ditch depth 40 ~ 50 cm, 40 cm wide groove, ditch should be flat. Apply the fertilizer into the ditch and cover it with soil. Immediately after fertilization, it should be watered with water to promote fertilizer and facilitate root absorption.

Second, foliar dressing top dressing time is short, effective, is conducive to flower bud differentiation, flower buds full, tree nutrient accumulation. Foliar spray fertilizer is mainly composed of 0.3% to 0.5% of potassium dihydrogen phosphate solution, sprayed once every 10 to 15 days, 2 to 3 times in succession, and the spraying effect is good in the evening.

Third, pest control

1. Remove the fallen leaves, rotten fruit, and weeds around the orchard after fruit harvesting, and concentrate deeply or compost. Many of the bacteria and pests that harmed the pears were overwintering in litters and weeds and became the source of diseases and insects in the second year. Therefore, the orchards and nearby litters, dead fruits, and weeds are cleared and the pests and diseases are eliminated.

2. Scrape the bark. Scrape bark can eliminate a large number of wintering germs and pests that lurk in the rough skin, cracked skin and trunk cracks of pear trees. Most of the rot and pathogens of the ringworm, ringworm, pear borer, star caterpillar, and red spider of the hawthorn are overwintering in the rough skin and cracks in the fruit trees. In winter or early spring, the old skin of the pear tree is scraped off with a spatula, and then lime sulfur is used in the trunk. Apply on. The old scrape must be burned or buried deeply.

3. Chemical control. After the fruit is harvested, pests and diseases are controlled in time to protect the leaves and prevent premature leaves. The main diseases of pear trees in autumn include pear black spot disease and pear black spot disease. These two diseases mainly damage the leaves. After the leaves are damaged, they cause early defoliation and directly affect the output of the following year. Can be used Dasheng, Bideley, carbendazim, Bordeaux mixture and other drugs. The main pests are red spiders and scale insects. Can be used avermectin, Insect grams control.

4. Plowing Orchard After picking fruit, plowing the pear orchard can loosen the soil and enhance the permeability. In addition, it can also reduce pests and diseases. The depth of ploughing around the tree tray is about 10 cm, 20-25 cm outside the tree tray. After ploughing, timely irrigation according to flooding. Through the deep fall of the orchard in autumn and winter, the pests hiding in the soil under the canopy of the tree can be turned out of the ground to allow the birds to feed or freeze. At the same time, the deep-turning can also bury the dead leaves on the ground and the pests hiding in the sub-algae underground.

5. The tree trunk is coated with white pears before it is defoliated and the tree trunk is painted white before it is frozen to prevent sunburn and frost damage on the fruit trees, and also to eliminate pathogens and pests that overwinter on the trunk. Whitening agent formulation: 10 parts of quicklime, 2 parts of lime sulfur, 1 part of salt, and 40 parts of water. After brushing, use a brush to evenly brush on the trunk and large side branches.

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