Pear disease rot is a devastating disease with the pathogen Phytophthora infestans. The disease has occurred in some pear production areas in our province. The incidence of serious land masses has been as high as 30%-50%, causing large economic losses to the fruit farmers.
Pear disease rot symptoms Pear trees infected, the leaf curling red, the base or branches of branches become dark green, and then gradually become dark brown stripes, the disease segment shrinks, depression, ring into atrophy, and a crack The phloem tissue becomes brown and necrotic. When the fruit is damaged, it shrinks when the weather is dry, and the heart turns brown. When the weather was wet, brownish round spots appeared early in the disease. After that, the spots quickly expanded into brown patches and a layer of white mold formed on the surface.
The main prevention and control technology Agricultural control: 1 do a good job of orchard drainage, to avoid flooding, water accumulation in the park, to prevent the spread of bacteria with water. 2 Reduce agricultural activities in orchards to prevent bacteria from adhering to animals, animals, animals, and tools, and bring them into the disease-free zone. 3 Do a good job of fruit tree pruning, pruning work, improve ventilation and light conditions in orchards, reduce the humidity in the field. 4 In the winter and spring, the residues of diseased plants, litters, and burns or deep burial were cleared in time. 5Apply organic manure and chemical fertilizer to improve the life ability of fruit trees and enhance disease resistance. 6 Excavate and expose the soil to reduce the spread of wintering germs. 7 It is forbidden to collect twigs, mosaics, etc. in the ward to prevent pathogens from entering the disease-free zone.
Biological control: The application of biological control agents to prevent germs and reduce the initial infection source.
Chemical control: Before the chemical control, scraping must be carried out, scraping and scraping can be used. Be careful not to damage the formation layer when scraping the skin. Scratch the white skin. The main chemical pesticides sprayed are: metalaxyl manganese zinc 400 times; Ledomil 600 times; double-click 矾300 times; mancozem 600 times plus metalaxyl 400 times; rifampicin Mn Zn 400 times liquid. Spray once at intervals of 10-15 days, add diesel emulsion as a synergist in winter and spring, delay the efficacy and enhance the control effect. During the fruiting period, care should be taken not to spray on the fruits to avoid phytotoxicity.
Pear disease rot symptoms Pear trees infected, the leaf curling red, the base or branches of branches become dark green, and then gradually become dark brown stripes, the disease segment shrinks, depression, ring into atrophy, and a crack The phloem tissue becomes brown and necrotic. When the fruit is damaged, it shrinks when the weather is dry, and the heart turns brown. When the weather was wet, brownish round spots appeared early in the disease. After that, the spots quickly expanded into brown patches and a layer of white mold formed on the surface.
The main prevention and control technology Agricultural control: 1 do a good job of orchard drainage, to avoid flooding, water accumulation in the park, to prevent the spread of bacteria with water. 2 Reduce agricultural activities in orchards to prevent bacteria from adhering to animals, animals, animals, and tools, and bring them into the disease-free zone. 3 Do a good job of fruit tree pruning, pruning work, improve ventilation and light conditions in orchards, reduce the humidity in the field. 4 In the winter and spring, the residues of diseased plants, litters, and burns or deep burial were cleared in time. 5Apply organic manure and chemical fertilizer to improve the life ability of fruit trees and enhance disease resistance. 6 Excavate and expose the soil to reduce the spread of wintering germs. 7 It is forbidden to collect twigs, mosaics, etc. in the ward to prevent pathogens from entering the disease-free zone.
Biological control: The application of biological control agents to prevent germs and reduce the initial infection source.
Chemical control: Before the chemical control, scraping must be carried out, scraping and scraping can be used. Be careful not to damage the formation layer when scraping the skin. Scratch the white skin. The main chemical pesticides sprayed are: metalaxyl manganese zinc 400 times; Ledomil 600 times; double-click 矾300 times; mancozem 600 times plus metalaxyl 400 times; rifampicin Mn Zn 400 times liquid. Spray once at intervals of 10-15 days, add diesel emulsion as a synergist in winter and spring, delay the efficacy and enhance the control effect. During the fruiting period, care should be taken not to spray on the fruits to avoid phytotoxicity.
Wetting Agent is anionic special surfactant compound products, which widely used in SC, EW, EC and OD formulation.
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Wetting Agent
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