Diseases law: pathogen mycelium and chlamydospores with plant debris left behind in the soil, or overwinter in the seed. The highest density of bacteria in 20cm of soil. Contaminated with soil and seedlings for the initial infection. Mainly on the root cause of the bacteria, diseased leaves spread diffusion through the soil and water. With nursery soil with Fusarium, the mother plant foliar pathogen infection first, then pass through stolons son Tony, catheters, but seedling obvious symptoms. Onset 15-18 ℃, 22 ℃ above the onset of the worst, 25-30 ℃ will cause strain dead, wilting most. Near the mother plant seedlings early onset, high foliar wholesale sick, the incidence is also serious. Continuous cropping, heavy clay soil, low-lying, poor drainage, geothermal low foliar supply, extensive farming, the soil is too acid, insufficient fertilization, partial nitrogen, fertilizer application is not composting, plant roots can cause stunted growth, will aggravate the disease . Symptomatic spraying fertilizer: What should be in line with what is missing to make the principle of spraying, especially if the leaves are in tip top of the leaves and along the edges or dead biological foliar veins, indicating that calcium deficiency, should be sprayed with calcium fertilizer; If the veins of green, yellow or white leaf, the symptoms gradually developed from the leaves to the old leaves, brown spots appear on the leaves serious, marginal scorch, shoot apex dead, early leaf drop, indicating that iron deficiency should supplement iron fertilization; If the blade is slightly missing the green phenomenon, and has wrinkles, sometimes thick fat abnormalities, severe dead twigs from the top down, indicating that boron deficiency, should fill boron fertilizer; if the section is too long between the plant branches, leaf hypertrophy green, Nitrogen adequate explanation should be sprayed with P and K based, and appropriate fertilizer spray some trace elements. Foliar features Marvell Biotechnology, Yunnan foliar provided by Shouguang Maiwei biotechnology company. Shouguang Maiwei Biotechnology Limited (www.maiweishengwu.com) Shandong Weifang, a leader in bio-fertilizer, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Marvell biotechnology leader in the staff warmly welcome all inquiries negotiations to create Marvell biotechnology a better future.