Summer is the period of rapid expansion of Yali pear. How to manage Yali pear in summer?

Summer is the vigorous growth season of Yali pear trees, which is not only a period of rapid fruit expansion, but also a period of flower bud formation. It is very important to manage this period, which is not only related to the high yield and harvest of pear fruit this year, but also to the quantity and quality of pear flowers next year. Focus on three things:

Yali pear

First, fertilizer and water management

On the basis of fertilization in autumn and winter, the compound fertilizer of flat nitrogen, low phosphorus and high potassium was applied once before flower bud differentiation from late May to mid-June, and then watered in time after fertilization. The amount of fertilization should be determined according to the tree age, tree strength and fruit, according to the annual requirement of 0.5 kg of pure nitrogen, 0.25 kg of pure phosphorus and 0.5 kg of pure potassium for every 100 kg fruit. Combined with spraying, 1% urea solution, 0.3% amino acid compound fertilizer solution and 0.2% potassium dihydrogen phosphate solution were sprayed on the leaves to supplement tree nutrition and enhance leaf photosynthetic capacity. Summer enters the rainy season, Rain Water increases, should be irrigated appropriately according to soil moisture, watering should be watered carefully, and flood irrigation should be strictly prevented. After the heavy rain, the stagnant water in the garden should be removed in time to prevent Rain Water from soaking and causing tree roots to rot.

II. Control of diseases and insect pests

1. Scab of Yali pear: check frequently at ordinary times, timely find and thoroughly remove diseased leaves and branches, eliminate the source of the disease, and timely carry out drug control according to the disease. 10000 times of DuPont Fuxing or 3000 times of difenoconazole can be used. 2. Ring disease: Hanbang 50% carbendazim 2000 times or 68.75% DuPont Yi Bao 1200-1500 times can be used. 3. Tenebrio Molitor: 10% imidacloprid 1500 times solution or 20% acetamiprid 3000 times solution + 4.5% cypermethrin 1500 times solution. 4. Pear planthopper: 2.0% abamectin 3000 times + 4.5% cypermethrin 1500 times. 5. Kangshi pink scale: 1500-2000 times of chlorpyrifos + 1000 times of chlorpyrifos, or 205Kangshi scale net 2000 times. 6. Heart-eating insects: 1000-1500 times of thiazuron 3 + 1000-1500 times of 4.5% beta-cypermethrin or 1800 times of 1% methamyl salt can be used.

Third, summer pruning

Summer pruning is a supplement to winter pruning. Good summer pruning is helpful to control excessive tree potential production, promote flower formation and improve ventilation and light transmission conditions. For the Yali pear tree with normal fruit, the dense branches and flourishing branches on the backbone branches should be strictly controlled, and the methods of coring, breaking, thinning and pulling branches should be comprehensively used to adjust the tree potential and angle of the backbone branches and cut off the erect branches, cross branches, disease and insect branches in time.