Can fruit trees be pruned in autumn? How to fertilize? What are the key points of pest control?

Fruit tree refers to edible fruit trees, perennials and their rootstocks that can provide edible fruit and seeds. Can fruit trees be pruned in autumn? How to fertilize? What are the key points of pest control?

Can fruit trees be pruned in autumn?

Fruit trees can not be pruned in autumn, it is best to carry out in winter, winter fruit trees dormancy, pruning damage to its small, autumn if pruning, fruit trees are still in the growth period, pruning will stimulate its germination, thus consuming tree nutrition, harmful and useless.

How to fertilize fruit trees in autumn?

Fruit tree autumn fertilization should be based on tree and soil fertility to determine specific fertilization methods. Basal fertilizer to deep for good, young trees can be appropriate shallow.

(1)Young trees are generally fertilized by single plant, and circular grooves with a width of 30 cm and a depth of 40-50 cm are dug at the vertical projection edge of the crown or double groove fertilization is adopted.

(2)Results Two fertilization methods are usually used for large trees. One is to spread the whole garden, spread the fertilizer evenly, combine the autumn ploughing deep garden soil 30 cm, and turn the fertilizer underground. The second is radial furrow application. Dig 4-6 radial furrows for each plant, 40- 50cm deep and 30- 45cm wide. Mix fertilizer and soil evenly and apply them into the ditch, or dig circular furrows 50cm deep and wide at the outer edge of the tree crown, and then dig several radial furrows from different directions with the trunk as the center. The depth near the trunk is about 15cm, and gradually deepen outward to connect with the circular furrows.

(3)Before fertilization, the exposed roots should be cut flat along the ditch wall, and the cut should be smooth to prevent the roots from moldy and rotting. Fertilization should be filled layer by layer, coarse fertilizer such as leaves, weeds, etc. on the bottom layer, apply a layer of fertilizer to cover a layer of soil, and finally the fertilizer soil should be 10-15 cm higher than the ground.

What are the key points of fruit tree autumn pest control?

Fruit tree diseases and insect pests seriously affect fruit yield and quality. Eliminating fruit tree diseases and insect pests in autumn can get twice the result with half the effort. There are mainly the following methods to kill fruit trees in autumn:

1. Trap and kill pests: make use of the selectivity of pests to wintering sites, tie grass or broken sacks on large branches of fruit trees after autumn, lure pests to pupate and overwinter, and then kill them intensively.

2. Remove residual branches and fallen leaves: In autumn and winter, combined with pruning to cut off diseased shoots and insect tips, and remove weeds and fallen leaves near the orchard and its surroundings, centralized treatment can eliminate a large number of overwintering pests.

3, ploughing garden: garden ploughing is not only an important measure to improve soil and promote fruit tree yield, but also an effective method to eliminate overwintering pests. Through ploughing, pests and germs in deep soil can be turned to the surface and frozen to death, dried to death or pecked by natural enemies, so that pests buried deep underground can not emerge and suffocate, thus reducing the overwintering base.

4. Chemical control: Autumn is the peak period when longicorn larvae eat and harm fruit tree branches. If fruit tree trunk is found to be damaged, insert poison stick after insect dung is removed, and seal the hole with mud; or directly pour a large amount of 80% dichlorvos emulsifiable solution 1500 times into the insect hole, and seal the hole with mud; dig, dig and stab the larvae in shallow parts with iron wire.

5. Spraying 1-2 times of sulfur mixture during the period of dormancy of fruit trees has significant control effect on various diseases and insect pests that harm fruit trees.