Pear tree summer management technical points
First, fertilizer management
Scientific and rational fertilization is the basis for the growth, fruiting and high yield of pear trees.
Young tree fertilization
Topdressing once around June 10, 50 grams of urea per plant. The saplings that will be put into operation in the second year will add phosphorus and potassium fertilizers, such as potassium perphosphate and potassium sulfate, to promote flower bud differentiation and improve the maturity of new shoots in the 5th and 6th months of the topdressing, laying the foundation for the next year.
2. Results tree fertilization
In mid-May, the fruit fertilizer was fertilized to promote fruit expansion. The P and K compound fertilizers were good. The dosage of 40-50 kg per mu and the depth of 20 cm were timely poured into the soil after application.
Second, summer pruning
The saplings are planted by pulling branches and cultivating the results. The result tree is fully pruned in summer to control the height of the canopy, maintain a high-yielding tree shape, regulate light and ventilation, control the growth of summer shoots, and promote the differentiation of flower buds. The main methods of summer pruning are to support the growth of summer shoots by supporting branches, pulling branches, hanging branches, picking hearts, buds, carvings, ringing, twisting branches and branching, which is beneficial to flower bud differentiation.
Third, pest control
At the end of spring and early summer, the temperature is suitable, and the rainfall is frequent. The pests and diseases that harm the pears are prone to disasters. Pear scab, black spot, ring disease, pear net, pear leafhopper and hibiscus, coal pollution are the main pests causing early defoliation. In addition, one-time picking is also one of the causes of early defoliation. Falling leaves in advance is the main reason for the secondary flowering of pears. In order to prevent secondary flowering, it is necessary to pay attention to picking fruits in batches; timely replenishing fertilizer after harvesting; strengthening pest control; and strengthening irrigation and tree cover in dry season. According to the principle of treating diseases and not treating diseases, the insecticides are sprayed once every 15-20 days, but the drugs are stopped one month before the fruit picking.
It is recommended to use the following recipes alternately:
1. Fluorosilazole + avoxychlor + potassium dihydrogen phosphate.
2. Triadimefon + imidacloprid + enemy kill + amino acid water soluble fertilizer.
3. EM bacteria + deltamethrin + potassium dihydrogen phosphate.
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