First, manual control
1. Remove weeds and fallen leaves in or around the orchard and deep-buried or incinerated.
2. Scrape apples, pear rot, and dried rot before sprouting, and apply rust-removing or humic acid copper to control apple, pear rot and dry rot.
3. In early April, scrape the barks of mature apple and pear, remove the diseased spots on the stems, and spiders, aphids, leaf roller moths, etc. that have been overwintering 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 harmed by the leaves of the last year, the tree should be sprayed once with 2.5% Uranus EC 2000 times or with 3 Baume degrees lime sulfur, which should also be protected against insects.
2, near the germination, with 50% dichlorvos 200 times smear cut mouth, branches and other parts, exterminate leaf roller moth. After budding and flowering or flowering, 2.5% Uranus EC can be sprayed to control leafhoppers, leaf curl insects, pear 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 (2.0-2.5 kg/mu) under the trees before flowering. Sprinkle into the soil after spreading.
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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