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[Symptoms] This disease occurs during each growth period. The incidence of vegetable seedlings, the development of yellowing and wilting with the disease, death, roots brown rot, a small amount of white mold in the rhizomes when the soil is moist. In the case of adult plants, first the external leaves become wilting and fade, and gradually develop into wilting and necrosis of the whole plant. At the same time, the roots and roots begin to change color. The initial stage is mostly brown to yellow-brown necrosis, and then develops brown to dark brown rot, and eventually the root tissue decays. Easy to pull up. When the humidity of the soil and air is high, the diseased part produces a small amount of moldy material that is initially pink and is a conidia of the pathogen.
[Implications] There is a pathogenic Fusarium in the soil, and the conditions are appropriate to cause the disease. It usually occurs in summer and autumn with high temperatures and is closely related to cultivation and management. Poor drainage, low-lying land, or improper management of water and fertilizers are more serious. Flat planting, underground pests are beneficial to the disease.
[Control methods] See strawberry root rot. Cultivation and management should pay attention to water and fertilizer management, the use of fully decomposed organic fertilizer, water pouring, prohibit flood irrigation. Promote seedling transplanting with soil, sorghum planting.
Root rot is a common disease of parsley, widely distributed and occurs more commonly. Protected areas and open fields have occurred, but the incidence rate is usually about 3%-10%, and individual diseased plots or greenhouse diseased plants can reach 40% or more, which has a significant impact on the yield.