Fruit trees without virus cultivation ten note
1. Reasonable selection of root stocks can be divided into two types of nutrition rootstocks and real rootstocks. The former is generally used as an anvil and will not have much problem. The latter is often used for root anvils. Some nursery units use seeds of cultivars as rootstock seeds. Although this kind of seedlings are robust and neat, they have poor root development and are susceptible to viruses. Pay attention when buying seedlings. 2. Carefully choose the species according to the market, climate, soil conditions and other careful choices, avoid too much too miscellaneous. Small miscellaneous fruits and large-size fruits are matched with early-midnight-maturing varieties, and processed varieties are moderately developed. For example, Jura, Jonagold, and Fuji No. 1 in apples are red and black in the grapes are all very good varieties. In addition, don’t over-believing some of the so-called new virus-free varieties imported from abroad. 3. Do not casually choose the garden virus-free seedlings should be specifically into the garden, and the ordinary garden from 50 to 100 meters or more, not to mix with ordinary seedlings. The virus-free apple should be at least 150 meters away from the pear orchard. 4. The planting density should not be too high. The planting density should not be too large to avoid premature closure. For example, apple dwarfing stocks with virus-free seedlings are generally 3m X 4m, and grapevines are generally 2m X 3m. Appropriate shaping, trimming to select the appropriate tree shape, such as the use of an apple with an open spindle or a slender spindle, the grape with a fence fan. Trimming should pay attention to light and slow release, inhibit long-term nutrition and promote reproductive growth, with particular attention to the pruning of the growing season. 6. Strengthen the management of fertilizer and water, apply basic fertilizers, apply 5,000-10,000 kilograms of organic fertilizer per 667 square meters, and top-up the fertilizer by 20% more than ordinary trees, so as to ensure that the drought can be poured and smashed to achieve high yield and high quality. 7. The ryegrass or leguminous green manures such as clover, alfalfa, and purple vetch are used to cover the sorghum or intercropping green manure, and the organic matter content of the soil can be increased by cutting and spreading the rows between the ryegrass during vegetative growth or green manuring. 8. Pay attention to the prevention and control of pests and diseases, especially the transmission of insects such as aphids, especially silver-grey reflectors, silver-gray plastic strips on suspended trees, repellents, yellow sticky plaques between the rows, and locusts on trees. Spray the medicine in time. 9. Trimming tools should pay attention to disinfecting the virus-free garden trimming tool is best to use alone, otherwise be sure to use tools to disinfect 70% alcohol or boiled water for 30 minutes. 10. Do not abuse drugs Virus-free seedlings Resulting in coloration later than usual, do not abuse drugs to promote coloring.