Protection against Frost injury of Pear trees in early Spring
1. Prevent frost 1. Spray salt water 10-20% brine before the arrival of night frost, which can not only increase the concentration of somatic sap, reduce the freezing point, but also increase air humidity. Water does not condense as expected to release latent heat and avoid freezing damage. 2. Spraying hormone 0.1-0.2% green vegetable solution in early spring to inhibit sprouting and postpone flowering and avoid frost injury. 3, whitening, whitening early spring with 7-10% lime solution white trunk, main branches, and spray white tree crown, can delay germination and flowering. Second, nursing frozen pear trees should strengthen fertilizer and water management. After applying rotten human feces and urine or available nitrogen fertilizer, 0.2% urea and potassium dihydrogen phosphate were sprayed on the leaves to promote the rapid restoration of tree potential. If the flower is frozen, 50PPM gibberellin can be sprayed to increase the fruit setting rate, pay attention to the prevention and control of diseases and insect pests, protect the leaves, and pollinate the unfrozen flowers in time.
- Prev
Chemical control of small heart borer in pear
Sex attractant can be hung in the orchard, check the number of trapping insects every day, generally 15 mu of orchard can hang 1. When the number of trapped adults increases sharply, the eggs and fruits are checked every 3 days. When the egg-fruit rate reaches 0.5%-1%, chemical control can be carried out. The main agents are: 1, 20% diflubenzuron suspension or 25% diflubenzuron wettability.
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What is the difference between pear trees and apples in pruning
The post-anthesis management of pear trees is a critical period of annual management. Whether the comprehensive management measures are appropriate in this period directly affects the fruit setting rate and fruit quality. The main points of pear management in this period are as follows: first, pollination pear flowers generally bloom after 8 o'clock in the morning, the flowers that open on the same day can be pollinated, and it is best to pollinate for 1-2 days.
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