Symptoms: The typical symptoms of corn bacterial stalk rot are immersed rot in leaf sheaths and stems in the middle of corn, causing tissue softening and rancid odor. It usually starts in the corn big bell period. Firstly, irregular water-soaked lesions appear on the leaf sheaths and stalks in the lower part of the plant. During the process of impregnating stems and leaves, the pathogens cause tissue necrosis and rot in the growth points and emit rancid odor. The diseased plants are easily broken off from the diseased area and cannot be headed or seeded. The general incidence rate is equivalent to the loss rate. Rainfall is conducive to the onset of disease, especially after continuous drought sudden rainstorms or sudden rain after heavy rain, high humidity in the field, high rate of pathogen invading stems; serious pests, low-lying land, etc. are also important causes of disease.
Control methods: early removal of diseased plants, centralized destruction, reducing the source of infection; rational fertilization, timely drainage after rain, soil cultivation, promote robust corn growth, enhance disease resistance; control pests, reduce wounds; chemical control can be used in the early stages of disease use 77% Can kill WP 600 times or spray streptomycin 4000 to 5000 times.
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