Spring fruit tree pest control points

The prevention and control of pests and diseases in spring is the key to prevention and control of disease in fruit trees throughout the year. The main diseases in the spring are powdery mildew, root rot and brown spot, etc. The pests mainly include leaf mites, roundworms, scale insects, gold thread moths, leaf roller moths and chafers. The main points of prevention and control of these pests and diseases are as follows:
First, manual control
1. Remove weeds and fallen leaves in or around the orchard and deep-buried or incinerated.
2. From early March to the end of March, scrape apple, pear rot, and dry rot. Apply cibiqing or copper humate to prevent apple, pear rot, and dry rot.
3. From late March to early April, scrape the barks of mature apple and pears, remove the diseased spots on the branches and rings, and spiders, aphids, leaf roller moths, etc. that have passed winter in the cracks in the bark. Clear peach, plum, apricot and other branches on the stem.
4. Remove the remaining leaves from the top leaves of apple and various fruit branches, and carry out deep burial or incineration to eliminate overwintering tip leaf roller moths and red spiders and other pests.
Second, chemical prevention
1. Spray 5 Baume degrees lime sulfur agent before germination to control the pathogens of red spider, two-leaf locust and remaining trunk.
In the orchard, which was seriously damaged by leafhoppers in the previous year, a 2.5% Uranus EC should be sprayed once a day or 3 Baume degrees lime sulfur should be sprayed.
2, near the time of germination, with 50% dichlorvos 200 times liquid smear according to the mouth branches and other parts, kill the leaf roller moth. After the budding and flowering stage or flowering, the bud stage can be sprayed with 2.5% Uranus EC 2000 times to control leafhoppers, leaf roller insects, Pterophyllum caterpillars and gold-grained moths.
3. If there are a large number of scarabs infestation, apply 4.5% of Aldehyde powder or 3% phoxim granules 2-2.5 kg/mu under the trees before flowering, and pour into the soil after spreading. Before flowering, the locusts seriously inflicted 2000-4000 times of New Year's Emulsifiable Concentrate, with good results.
In early May and early May to control early defoliation, anthrax, ring rot and leafhoppers, leaf roller moths, can spray 70% thiophanate-methyl 800-1000 times, add 2.5% Uranus EC 2000 times.
5. For root rot plants, when the upper part of the local area shows signs of symptoms, the radial sulcus is excavated immediately and the drug is applied. Can be used 10% double effect Ling 200 times or 500 times liquid bacteria poisoning, adult trees per plant irrigation 50-75 grams, tree small reduction.

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