1, rice blast leaf spots. When rice leaves develop, the acute type, the spot begins with small dark brown spots, becomes oval later, the leaves have grey green moldy, chronic type, spot fusiform, next to red-brown, central gray, There is a brown line running through the lesion. When wet, there is a gray mold on the back of the lesion.
2, flax leaf spots, lesions like small needles at the beginning, after the gradual formation of oval spots, the shape of sesame seeds, thick spots to see the dark brown, darker than rice blast. A closer look at the color is divided into three layers: the outer edge of the yellow halo, the edge layer is wide, dark brown, the center is mostly gray and yellow. Features: The dark brown part of the lesion looks to the light and often hides the thin ring veins. There are no necrotic lines on both sides of the lesion.
3, brown bar leaf spot. The disease began at the midrib of the base of the leaf and stretched upwards and downwards, resembling brown stripes. The disease department broke off the milky white sap, and the diseased plant was severely rotted. A rancid smell occurs. The dead leaves are dead, and the heart leaves dead in the heart and become dead.
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