Grafting cucumber cultivation technology has been used for many years, mainly used as a grafting rootstock pumpkin, pumpkin root system developed, strong absorption capacity, strong growth, grafted cucumber growth period, easy to obtain high yield cultivation, and grafted cucumber and non-grafted cucumber The difference in quality is not significant. Because the pathogen causing cucumber wilt disease is the specialized cucumber type of Fusarium oxysporum, the pathogen only shows specific pathogenicity to cucumber, but it does not have pathogenicity to pumpkin and so on. Therefore, pumpkin is used as a pathogen. Grafting cucumber on rootstock can prevent cucumber wilt. The technology has been used as a mature technology to increase cucumber yield and prevent cucumber wilt disease. In recent years, with the increasing cultivation area of ​​grafted cucumber facilities, a new phenomenon has emerged in the cultivation of grafted cucumbers, even if grafting is used in cultivation. With technology, plants still die.
Symptoms: Water-soaked appearance at the base of the stem and the soil, and a layer of white mold, the whole plant wilted to death, brown lesions, serious diseased plants did not wither and direct lodging, root and neck disease more serious, root damage Not heavy. Grafted cucumber root rot was identified by national experts.
Pathogens: Fusarium meliloti melon specialization type, the bacterium only has pathogenicity to melon crops, spread through the seeds, soil infection, in the path of pathogen infection, tomato disease melon specialization type and sharp The specific cucumber type of Fusarium spp. is different, and the cucumber type of Fusarium oxysporum can exist in the vascular bundles of the diseased cucumber plants, resulting in the systemic infection of the whole plant, while the specialization type of the Fusarium solani of the tomato disease will not be in the plant. Causes systemic infestation and poor mobility in plant vascular bundles.
Prevention and control recommendations: prevention-based, comprehensive prevention and control. The selection of disease-resistant cucumbers and grafted rootstocks is a good solution to the problem of grafted cucumber root rot. Disinfecting seeds and soil before sowing can kill pathogenic bacteria in the seeds and soil, and strengthen management of water, fertilizer, temperature and humidity. Cucumbers provide good growth conditions and increase their resistance to disease.
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