There are significant differences between the symptoms of potassium deficiency in crops and the symptoms of nitrogen deficiency. For example, the nitrogen deficiency during the middle growth stage of maize is characterized by the fact that the old leaves turn green along the midribs and appear yellow, while the symptoms of potassium deficiency usually start from the tips and edges of the old leaves and turn green and gradually turn brown. As the degree of potassium deficiency aggravated, the chlorotic areas of the leaf tip and leaf margin gradually became necrotic and the leaves were dry and burnt. The farmers called it "focal edge." The potassium-depleted soybean and cotton leaves not only have obvious edgelessness, but also have brown spots on the leaves. When the potassium deficiency is severe, the leaves are damaged due to tissue necrosis. The lack of potassium in the jointing stage of rice is characterized by the dry coking of the tip, the yellowish edge of the leaf, and the spots on the leaves.
In addition to directly affecting crop yields, potassium deficiency is also susceptible to diseases such as leaf spot disease in rice. Particularly, potassium-deficient fruits have small fruits, poor coloration, and are not resistant to storage. Fibers of fiber crops are shorter, and tobacco is less combustible. The quality has dropped seriously. For this reason, people call potassium a stressor or quality element.
When confirming the potassium deficiency in the crop through morphological diagnosis, topdressing potassium fertilizers such as potassium sulfate or potassium chloride should be applied in a timely manner to obtain better results. For potassium-rich crops such as cotton, sugar beet, potato, hemp, and fruit trees, special attention should be paid to potassium supplementation. Even if there are no symptoms of potassium, potassium fertilizer should be properly applied to improve crop disease resistance and improve product quality.
According to the site of Fungal Infection,it can be divided into superficial fungal infection and deep fungal infection, superficial fungal infection is caused by ringworm infection of the skin, hair, fingers, toe fingers. The incidence rate is high with less harmful. Deep fungal infection is caused by Candida and cryptococcal invasion of internal organs and deep tissue, the incidence is low with big harmful. Classified based on mechanism action classification can be divided into (1) Antifungal agents for sterol synthesis in fungal cell membranes (2) Antifungal agents for fungal cell wall synthesis (3) Antifungal agents acting on nucleic acid synthesis, The Antifungal drugs easily affect the white blood cells and liver function, if in long-term use,it may caused a transient increase in GPT or leukopenia, withdrawal is normal.
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