Spring is a key period for carrying out pest control and reducing the density of insects in the current year. The main diseases of spring orchard are powdery mildew, root rot and brown spot. The main pests are leaf mites, aphids, scale insects and golden moths. , leaf roller moth, pear star caterpillar and chafer. The prevention and control methods of these pests and diseases are as follows:
Before germination, carefully examine the rot disease, cure the rot and cure the sputum, and carefully scrape the bark tissue with a 0.5 cm wide healthy bark. The scraped disease belt is burned out in the orchard. After scraping, apply the rot or 40% Fumi arsenic solution, or spray the whole tree once to rot 50 times.
In the orchard where the leaf mites were seriously damaged in the previous year, the whole tree should be sprayed with a 2.5% Uranus emulsifiable concentrate 2000 times solution or a Baume 3 degree sulphur sulphur mixture or a 40% crystal sulphur sulphur mixture 50 times solution to prevent scale insects.
When germination is approaching, use 50% dichlorvos 200 times solution to smear the slash and branch and other parts to kill the leaf larvae. After germination flowering or flowering, the bud stage can be sprayed with 2.5% Uranus emulsifiable concentrate 2000 times to control leaf mites, leaf curlers, pear star caterpillars and golden moths.
In mid-to-late April, combined with pre-flowering re-cutting, artificially cut off powdery mildew and other pests and shoots. If a large number of chafers are harmful, apply 4.5% of the enemy powder or 1.5% of the linden powder or 3% of phoxim granules 2 to 2.5 kg/mu before the flowering. When the aphid is seriously damaged, it is effective to spray 2000-4000 times of the winter emulsifiable concentrate.
In the middle of May, it is mainly used to control early defoliation, anthracnose, ring rot, leaf mites and leaf-rolling moths. It can spray 70% methyl thiophanate 800-1000 times liquid or 50% carbendazim WP 800 times liquid. Or 70% mancozeb 600-800 times solution, add 2.5% Uranus EC 2000 times solution. The golden moths occur in heavier gardens. In the adult emergence period and the young hatching period, 25% of the 2,500 times of the chlorpyrifos 2,500 times of the solution and 2.5% of the ovaline emulsifiable concentrate are used to prevent the larvae of the lepidopteran.
For root rot plants, the local upper part of the initial symptoms, immediately excavated radiation ditch irrigation treatment. 10% double effect spirit 200 times liquid or bacteria poison clear 500 times liquid, adult trees per plant irrigation 50-75 grams, the tree is small reduction.
Before germination, carefully examine the rot disease, cure the rot and cure the sputum, and carefully scrape the bark tissue with a 0.5 cm wide healthy bark. The scraped disease belt is burned out in the orchard. After scraping, apply the rot or 40% Fumi arsenic solution, or spray the whole tree once to rot 50 times.
In the orchard where the leaf mites were seriously damaged in the previous year, the whole tree should be sprayed with a 2.5% Uranus emulsifiable concentrate 2000 times solution or a Baume 3 degree sulphur sulphur mixture or a 40% crystal sulphur sulphur mixture 50 times solution to prevent scale insects.
When germination is approaching, use 50% dichlorvos 200 times solution to smear the slash and branch and other parts to kill the leaf larvae. After germination flowering or flowering, the bud stage can be sprayed with 2.5% Uranus emulsifiable concentrate 2000 times to control leaf mites, leaf curlers, pear star caterpillars and golden moths.
In mid-to-late April, combined with pre-flowering re-cutting, artificially cut off powdery mildew and other pests and shoots. If a large number of chafers are harmful, apply 4.5% of the enemy powder or 1.5% of the linden powder or 3% of phoxim granules 2 to 2.5 kg/mu before the flowering. When the aphid is seriously damaged, it is effective to spray 2000-4000 times of the winter emulsifiable concentrate.
In the middle of May, it is mainly used to control early defoliation, anthracnose, ring rot, leaf mites and leaf-rolling moths. It can spray 70% methyl thiophanate 800-1000 times liquid or 50% carbendazim WP 800 times liquid. Or 70% mancozeb 600-800 times solution, add 2.5% Uranus EC 2000 times solution. The golden moths occur in heavier gardens. In the adult emergence period and the young hatching period, 25% of the 2,500 times of the chlorpyrifos 2,500 times of the solution and 2.5% of the ovaline emulsifiable concentrate are used to prevent the larvae of the lepidopteran.
For root rot plants, the local upper part of the initial symptoms, immediately excavated radiation ditch irrigation treatment. 10% double effect spirit 200 times liquid or bacteria poison clear 500 times liquid, adult trees per plant irrigation 50-75 grams, the tree is small reduction.
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