A flow prevention gum disease. Branch flow plasticity is a common physiological disease, and the tree vigor is severely weakened after plastic flow occurs. The backbone branches often break and cause incomplete canopy, premature tree failure, short-term results, low yield, and poor quality. According to the survey, many low-yield peach orchards are related to the occurrence of gum disease.
Prevention:
1. In early spring, Taoyuan should strengthen the drainage of drains to prevent waterlogging, pay attention to soil improvement, lime should be applied to acidic soil, and organic matter should be added to viscous heavy soil.
2. In the early spring, after the fluidosis was found, the scraper could be used to scrape the peach gum block, and then the fluid spot and the wound were smeared with medical gentian violet, and then applied once every 10 days. The control effect was significant.
3, for the trees that have been flowed, the branchlets can be removed by trimming. The glue on the branches can be scraped off the diseased part first, and then be disinfected with Baume 4~5 degree Shiliu Mixture and then protected by wax. Smear.
Two anti-deficit leaf disease. The pathogen of the disease winters as winter as the ascospores or spores on the bud scales of peach trees and on the stem bark of the branches. When the peach trees germinate in early spring, the wintering spores germinate from the leaves on the dorsal (before leaves) or on the leaves (from the leaves). After) the epidermis invades the leaves, or percutaneously invades the buds for initial infection. The invading mycelium of the pathogenic bacteria in the leaves spreads between the epidermis cells and the cells of the palisade tissue, making the diseased leaves hypertrophic, shrinking, and discoloring. The occurrence of the disease is closely related to the weather conditions in early spring. When the peach sprouts, even in the rainy weather, the incidence is heavy. On the contrary, the incidence is light. Between different varieties, the incidence of early maturing varieties was heavier, and that of mid-late maturing varieties was lighter.
1. Peach blossom petals (unexpanded) spray once Baume 4 to 5 degrees of lime sulfur or 100 times the equivalent (that is, copper sulfate, quicklime and water ratio of 1:10:100) Bordeaux mixture. In the end of May, spray 50% of Sensen Zinc 300~500 times for 1~2 times. 2. Strengthen orchard management. When the diseased leaf is seen in the early spring, it is timely removed and burned. When the disease is severe, the tree should be supplemented with fertilizer in a timely manner to enhance the tree vigor and improve the disease resistance of the tree.
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