Today, the small series of Huinong.com is the prevention and control method for root-knot nematodes brought to you by farmers. How to prevent the occurrence of root-knot nematodes from the ecological principle of soil and fertilizer? Friends who need to know can look! First, the occurrence of root knot nematodes Most of the nematodes occur on sandy soils and sandy soils that have been planted for more than 2-4 years, and the sticky land is less likely to occur. The extent of nematode occurrence is closely related to soil type and is related to the nature of fertilizer application. Therefore, adjusting the physical and chemical properties of the soil, rationally matching fertilization, and grasping the ratio of organic and inorganic fertilizers is fundamental to the treatment of nematodes. The blind use of chemical pesticides with high toxicity and strong residuals is only a surface effect, which has caused great obstacles to the production of organic melons. Second, root knot nematode prevention and treatment methods (1) How can we avoid the occurrence and spread of nematodes? The sheds with sand base do not use or use all the fertilizers containing potassium, magnesium, nitrate and sodium, and use the soil-improved fertilizer. It can avoid the occurrence of nematodes, and the common soil improvement fertilizer greenhouse can reduce and inhibit nematode disease. It is not necessary to use less or less fermented chicken manure containing lime, veterinary drug residues, and large salinity as the base fertilizer, instead of using the same value of soybean noodles instead of chicken manure organic fertilizer, otherwise, the occurrence and spread of nematodes are induced. (2) What measures should be taken to prevent the occurrence of nematodes? Nematodes are usually bred at temperatures ranging from 12.6 to 18.9 °C, occurring at 18.9-25.2 °C, and at 25.2-31.5 °C, consuming 31.5-37.8 °C. Therefore, the soil improvement fertilizer is 200-300 kg/mu before the planting period. In the seedling stage, nematodes and roots are used to irrigate the roots, and once in the middle of 15-20 days, the occurrence of nematodes can be avoided. (3) How to prevent the occurrence of nematodes in sloping fields with serious sandy soil? For sloping fields with serious sandy soil, the soil traits will be improved by pressing 3-5 square meters/mu of silt soil every year, and the soil improvement fertilizer will be 200-300 kg/mu, and the ploughing will be evenly distributed to avoid the occurrence of nematodes. (4) What should I pay attention to in the sheds where nematodes occur? For shed fields where nematodes occur mildly, it is strictly forbidden to apply all the fertilizers containing nitrate, chlorine and hormones. Otherwise, the nematodes will be induced to occur rapidly. (5) How should the sheds of nematodes be managed? In the shed field where nematodes have been obtained, the chicken dung can be replaced by the same value of soybean noodles, and the soil improved fertilizer is 630 kg/mu. The cultivated soil is mixed in 7-inch soil layer, ridged and planted, and the rootworm is used to eliminate roots and roots. In the medium-term 15-20 days of irrigation, the occurrence of nematodes in the current season can achieve better benefits, and the use of two seasons can basically reduce or eliminate the occurrence of nematodes. From the above aspects, we have summarized how to prevent and cure root-knot nematodes. Do you understand that using soil and fertilizer ecological principles to prevent the occurrence of root-knot nematodes is a scientific and effective method. Ceiling-Mounted Radiation Shielding Screen,Hanging Protective Lead Screen,Ceiling-Suspended Lead Screen,X-Ray Protective Overhead Suspended Shield Longkou Kangxie Medical Instrument Co., Ltd , https://www.kangxiemedical.com
