After entering December, the leaves of pear trees fall off and enter the dormant period, and the pests also enter the latent overwintering period. Doing a good job in the prevention and control of clearing the garden in winter will have a multiplier effect on reducing the pests and diseases of pear trees in the coming year and will also minimize the use of pesticides in the coming year.

Plastic trimming

The pruning time is from the beginning of December to the end of January of the following year, with a natural open-shaped canopy.

Pruning method: control the height of the tree, the height of the crown is within 2.5 meters, remove the large vertical branches in the center, and keep the tree body ventilated and light; select the extension branches according to the yield and the amount of fruiting branches and flower buds; remove the long branches and dense branches on the back , Cut off diseased branches and dead branches.

Winter clearing

Cleaning the orchard: Cleaning the orchard can eliminate the source of overwintering pathogens and insects in the pear twigs and deciduous weeds in the orchard.

Technical points: (1) Scrape bark. As the saying goes: "You must eat pears and scrape the bark." After pruning, immediately shave off the rough old bark, warped bark, and cracked bark on the trunk of the pear tree. The depth of the scraping is to shave off the rough and diseased bark, revealing light brown The cortex is appropriate to reduce the pests that overwinter in the cracks of rough and old bark. (2) Eliminate remaining branches and leaves, dead fruit and weeds in the orchard, and concentrate them to retreat and bury them or burn them to increase the source of organic fertilizer and reduce the source of overwintering pests.

Trunk whitening: Whitening the trunk can reduce the temperature difference between the day and night of the trunk and play an anti-freeze effect; eliminate the bacteria and eggs remaining on the trunk and protect the wounds of the trunk.

Technical points: After scraping the bark, whiten the main trunk of the pear tree, starting from the roots and stems to within 1 meter of the main branches. The preparation of whitening agent: mixed with 10 parts quicklime, 0.5 parts sulfur powder, 0.2 parts salt, 0.2 parts animal oil, and 35 parts water.

Chemical clearing of the garden: Use mineral and botanical chemicals to clear the garden to eliminate and eradicate the source of overwintering pests on the branches of pears.

Technical points: After cleaning the orchard, clean the orchard with chemicals. For pear orchards dominated by mites and diseases, 70% thiobarium powder can be sprayed 100 times; for pear orchards dominated by scales, 45% orchard powder 80~ Spray 100 times or 300 times of 30% sodium pinoresinate water to eliminate overwintering pests and reduce pests and diseases of pear trees in the coming year.

Fertilization

Fertilization increases the organic fertilizer to improve the soil, increases the nutrient accumulation of the tree, and promotes high quality and high yield of pear trees in the coming year; deep turning can kill the overwintering eggs in the soil or reduce their survival rate.

Technical points: (1) Dig a trench with a depth of 30-40 cm and a length of 80-100 cm under the canopy drip line, and apply 50 kg of organic fertilizer such as decomposed fence fertilizer and weeds to each plant, and 1 to 1.5 kg of special compound fertilizer for fruit trees. Then cover the soil in time. (2) Plow the orchard soil to eliminate the flower buds, maggots and other pests that live in the soil during the winter. The appropriate plowing depth is about 20 to 30 cm. (3) Clean up the orchard ditches, facilitate drainage and irrigation of the orchard, and enhance soil aeration and root vitality.

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