Jujube disease, also known as jujube tree broom disease, broom broom disease, is a highly contagious systemic infection of the whole body, is a devastating disease of the jujube tree, known as "jujube cancer." Control measures: 1. Strictly strengthen plant quarantine work to prevent the spread and spread of infected seedlings. 2. Strengthen the management of water and fertilizer in orchards, timely remove weeds in and around the jujube garden; reasonably pruning, appropriate load, and increase tree vigor. 3. Choose to use varieties with strong disease resistance, choose virus-free rootstocks and cuttings to carry out high-yield grafting, and graft and breed seedlings; strengthen cultivation and management of plants and promote robust growth of trees. 4. Pay attention to the inspection of diseased plants and diseased seedlings. Immediately after discovery, they shall be removed and burned, and the disease shall be controlled at the seedling stage. 5. For the early infection, the incidence of light jujube plants, cut off the disease branches, cut mouth should be in the disease branches below the branches, the disease branches concentrated burn; pay attention to the disinfection of pruning scissors to prevent cross-infection. 6. Remove jujube trees and jujube trees around the jujube garden with severe disease. Remove the roots of the branches from the top of the jujube tree and the jujube garden. Remove the roots and root seedlings, burn them, and reduce the spread of the bacteria. 7. Spray 10% imidacloprid 3000 times in a timely manner to control vector-borne pests. 8. Use special medicines such as "Crazy 1", "Crazy 2" and other special agents to infuse trunk treatment
Double Convex Cylindrical Lens
Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylinder Lenses are available with positive or negative focal lengths, they are used for the optics, lasers, medical science, electronics, tele-communication and others.
Worldhawk can offer cylinder Lenses include convex Cylindrical Lens, concave cylindrical lens, Meniscus Cylindrical Lens, and Doublet Achromatic Cylindrical Lens ect. Choose from N-BK7 glass, UV fused silica, or CaF2, all of which are available uncoated or with an antireflection coating.
Worldhawk can provide various kinds of cylindrical lens with high precision, We are proud to be one of the few suppliers can detection the radius and flatness about the cylindrical lens in China. Absolutly can ensure all the products are qualified.
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