corn
Fusarium head blights are surrounded by red or pink filaments, which often grow yellowish and pink mycelia.
The ear and kernels of the round spot disease ear are black in color and the seeds are black and rot. The damage is usually in the middle or top of the ear, the diseased part is sunken, the ear is curved, and the grain is covered with black moldy layer.
The dry rot disease granules are brownish or dark brown on the outside, and have small, dry rot. When germinating, white molds surround the surface of the diseased granules, and black granules sometimes adhere to the lower part of the diseased granules.
Soybean
Chlamydial disease is brown granules, with the umbilicus as the center, extending to both sides. The color of the stripes is the same as that of the umbilicus of the seeds, and there are three kinds of black, grayish blue or brown. The light has small spots, heavy spots, and almost full of grains.
Spot disease seeds have lilac to deep purple spots on the skin. The spots are of different sizes and the whole bean becomes purple when it is severe. Another symptom of the disease is the formation of black mold beans. The diseased patches are brown or dark brown, sometimes slightly blackish, and the grain shrinks. There are longitudinal cracks on the seed coat.
The spot on the surface of gray spot disease is round to irregular, brown or russet, and the grain center is not moldy.
The downy mildew granules have a tight white or grayish mycelium on the surface of the skin, with a large number of oocysts.
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