In terms of diseases, when the potato is infected with Verticillium wilt, early blight, late blight, and mosaic virus disease, the symptoms of yellowing of the leaves will appear. The symptoms of each disease are as follows. Please read the reader. Potato verticillium wilt is a serious soil-borne and seed-borne disease. After infection, the vascular bundles in the roots and stems of the diseased plants are destroyed, the leaves are yellowish and gradually turn brown, the light-scarred plants grow slowly, and the lower leaves turn brown. Dry, showing symptoms of yellow wilt, the entire plant is wilting and dead, and the stalk can be seen to turn the vascular bundle into dark brown. Late blight is a common disease of potato. The leaf infection begins from the middle and lower leaves. Water-stained brown spots appear at the tip of the leaf. The leaves are marked with pale yellow chlorotic edges. The lesions are black on the stem or petiole. Or brown, if it is judged to be late blight, you can use fluopyram or sulphate. Early blight first occurred on the lower leaves of the lower part of the plant. At the early stage of the disease, brown and black water-soaked small spots appeared on the leaves, and the leaf tissue around the lesions and the lesions chlorotic, with the emergence of new spots and old spots. The expansion, the entire leaves are chlorotic, then necrotic, dehydrated. Early blight usually occurs when the tubers begin to expand. Before the onset of the disease, chlorothalonil, mancozeb, and captan are sprayed. In the case of fertilizer deficiency, when the potato is deficient in nitrogen, potassium, sulfur and magnesium, it will appear yellow in the middle and lower leaves. If the element is not replenished in time, it will develop upwards and the whole plant will show obvious symptoms of deficiency. In the absence of potassium, it appears as leaf tip and leaf margin necrosis, which turns yellow-brown, and gradually spreads to the whole leaf. The old leaves are bronzed, and the dry and nitrogen-deficient nitrogen deficiency is characterized by evenly pale green leaves. In severe cases, the leaves are cup-shaped and sulfur-deficient. The plant is yellow, the growth is slow, the leaves will appear brown tip, the leaf tip and the inter-pulse chlorotic, and expand to the center. Later, the lower leaves become brittle and thickened, and the chlorotic leaves turn brown and bad. Color, shedding, if it is determined that the element is lacking, it can be sprayed or drip-irrigated with Su Gu Mi potassium, phosphorus potassium power, and Hui De nutrient solution. The sulfur-sparing block can be sprayed with sulfur dry suspension. This article URL: The cause of yellowing of the lower leaves of potato and its prevention and treatment Injectable Anti Acne Solution,Acne Mesotherapy Solution,Anti Acne Meso Solution,Acne Treatment Mesotherapy Jiangsu Tiera Biotechnology Co., Ltd , https://www.tierabio.com