Maize fungal top rot is a new dominant disease in Northeast China. It occurs in Heilongjiang, Heilongjiang, Jilin, and Liaoning, and shows an upward trend year by year. The potential risk is high. Symptoms are that the top of the plant is rotted, the single ear is small, and the grain is not full.
Maize will show symptoms at seedling stage to adult stage, and appear dwarfs in different degrees; leaves in the middle and upper parts show chlorosis, malformation, shrinkage or distortion; marginal tissue is cut and notched, edges are yellow, along the main vein Yellow stripes are formed on one side or both sides; only the main vein is rotted at the base of the leaf, and the ear is small or not strong at the late stage.
Occurrence
The pathogenic bacteria overwintered in the soil, diseased bodies and carriers of bacteria, becoming the primary source of infection for the next season. Seed carriers can also spread long distances, so that the growing area of ​​disease. Top rot has some characteristics of systemic infestation, and the pathogenic strains of pathogenic bacteria produced by the diseased plants can also spread with wind and rain and undergo reinfection. In the low-lying plots and the soil, the heavy soil masses are relatively severely affected; in the paddy fields, the incidence of paddy fields and hilly lands is high.
Control methods
1. To scoop shovels in time to make full use of the fine weather to speed up the progress of excavation, remove moisture and heat, eliminate weeds, improve the quality of seedlings, and enhance disease resistance.
2. To remove the diseased leaves from the heavier diseased strains in which the heart and leaves of the corn have been distorted and rotted, scissors may be used to cut and wrap the leaves above the tassels to facilitate the normal spearheading of the tassels, and to bring out the diseased leaves that are cut out of the field. Buried processing.
High Pressure Extension Tubings,high pressure PVC extension tube,Extension Tubings,extension tube medical
Anesthesia Medical Co., Ltd. , https://www.honestymed.com