Citrus resin disease, also known as fluid gum disease, mainly damages trunks, branches, leaves and fruits. In the autumn and winter, after fruit picking, prevention and treatment, removal of lesions, eradication of pathogens, the second year of high temperature and rainy season, the incidence of disease is greatly reduced, playing a multiplier role.
Control methods:
After the citrus fruit is picked, check the citrus trees and find dry branches, yellow-brown or black-brown pectin sand on the leaves, brown dead bark on the trunk, and odor. Cut dry branches;
Then the canopy is sprayed 2 to 3 times 500 times 20% copper sorbate suspension, or 500 times 77% copper hydroxide wettable powder, or 800 times 1.8% aqueous octamine acetate solution, or 600 times 50% eubacterial Aqueous solution, or 800 times 65% Zeason zinc solution, spray once every 10 to 15 days, evenly spray all the branches inside and outside the canopy, especially pay attention to wet the diseased trunk and branches, to start dropping drops of water It is appropriate.
At the same time, use a sharp knife to scrape off the viscous gel from the diseased skin and apply a layer of lime sulfur residue, or a 1:1:50 dilution of Bordeaux pulp, or 200 times 80% of the bacteria. Aqueous solution, or 150 times 70% solution of thiophanate-methyl solution, continuous coating 3 to 5 times, once a day, evenly coated in the diseased place, to fill the wound with liquid medicine is appropriate.
In addition, it is also necessary to spray a 0.8-1.0 bamiide ​​aqueous solution of lime sulfur inside or outside the canopy in the winter, or a 1:1:100-fold Bordeaux mixture to evenly spray all the trunks and leaves to begin dropping drops of water. Appropriately, it has a good effect on reducing the occurrence and harm of resinous diseases. Http://
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