1. Potassium lacks potassium. The green leaves in the seedling stage are blue, the old leaves are covered under soft conditions, the heart leaves are straight, the red-brown tissue on the tip of the middle and lower leaves shows tissue necrosis, and the leaves have irregular red-brown spots. Subsequently, premature aging, scorching, rice pods scattered, plant extension blocked and dwarf; more brown roots, weak roots, aging and premature aging; pods increased, lack of luster grain, not full; easy lodging and infection of Flax or spot disease .
2, rice leaf spot disease, also known as rice leaf blight. It occurs in all rice regions of the country, and it can develop from the seedling stage to the harvest stage. Infested rice plants can be damaged above the ground, with more leaves. In the bud stage, the colebra becomes brown, the buds are not extracted, and the cotyledons are withered. The incidence of leaf and sheath in seedling stage is mostly elliptic lesions, such as the size of flax pellets, dark brown, sometimes the lesions expand into strips, and the lesions often die. Adult leaves become infected with brown dots at the beginning, and gradually expand into oval spots, such as sesame size, central brown to gray spot, brown edges, yellow halos around different shades, and even irregular large spots around them. . The diseased leaves were dry inward from the tip of the leaves, light brown, and black moldy (disease conidiophores and conidia) were generated on the dead plants. Lesions on leaf sheaths were oval in shape, dark brown in colour, brownish on the edges, water-stained, and later changed to an irregular large spot with a central taupe. The incidence of panicle neck and branches, the victim was dark brown, causing the ear to dry. The grain was infected and the grain was damaged by grayish black in the early stage. Afterwards, it gradually expanded to full grain and caused the valley. The later stage of the disease was small, the edge was not obvious, and the diseased grain was brittle and fragile. When the climate is humid, the disease minister produces a black fungus layer, which is the pathogenic conidiophore and conidia.
2, rice leaf spot disease, also known as rice leaf blight. It occurs in all rice regions of the country, and it can develop from the seedling stage to the harvest stage. Infested rice plants can be damaged above the ground, with more leaves. In the bud stage, the colebra becomes brown, the buds are not extracted, and the cotyledons are withered. The incidence of leaf and sheath in seedling stage is mostly elliptic lesions, such as the size of flax pellets, dark brown, sometimes the lesions expand into strips, and the lesions often die. Adult leaves become infected with brown dots at the beginning, and gradually expand into oval spots, such as sesame size, central brown to gray spot, brown edges, yellow halos around different shades, and even irregular large spots around them. . The diseased leaves were dry inward from the tip of the leaves, light brown, and black moldy (disease conidiophores and conidia) were generated on the dead plants. Lesions on leaf sheaths were oval in shape, dark brown in colour, brownish on the edges, water-stained, and later changed to an irregular large spot with a central taupe. The incidence of panicle neck and branches, the victim was dark brown, causing the ear to dry. The grain was infected and the grain was damaged by grayish black in the early stage. Afterwards, it gradually expanded to full grain and caused the valley. The later stage of the disease was small, the edge was not obvious, and the diseased grain was brittle and fragile. When the climate is humid, the disease minister produces a black fungus layer, which is the pathogenic conidiophore and conidia.
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