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This symptom consists in the presence of bright yellow spots of different sizes, which may appear with yellowing around the nerves. In some cases the leaflets turn completely yellow. This symptom is called "aucuba leaf" or simply "aucuba" because of its similarity to the normal leaves of the species Aucuba japonica. The consequences of these ...
Fusarium dry rot of potato is a devastating post-harvest losses (vegetables) disease affecting both seed potatoes and potatoes for human consumption. [3] Dry rot causes the skin of the tuber to wrinkle. The rotted areas of the potato may be brown, grey, or black and the rot creates depressions in the surface of the tuber.
Potato yellow dwarf virus: genus Nucleorhabdovirus, Potato yellow dwarf virus (PYDV) Potato yellow mosaic virus: genus Geminiviridae, Potato yellow mosaic virus (PYMV); subgroup III Potato yellow vein virus: Potato yellow vein virus (PYVV) Potato yellowing virus: genus Alfamovirus, Potato yellowing virus (PYV) Potato virus A
Leaf margins become necrotic, turning brown and purplish and curl inwards towards the center of the leaf. Secondary infection, which starts from infected potato culls, produces more severe symptoms. Leaf rolling is more apparent and the entire leaf can become chlorotic and sometimes also has a purple discoloration. [ 4 ]
The Potato yellow vein virus (PYVV) is a plant pathogen of the Closteroviridae family. It is a whitefly-transmitted closterovirus vectored by Trialeurodes vaporariorum, which is known to cause a yellowing disease in potato crops in South America. [1] PYVV RNA have a conserved 3'-terminal secondary structure, which includes a pseudoknot. [1]
White potatoes, red potatoes and gold potatoes, tend to have very similar nutrient profiles — including carbohydrates, fiber and protein — for about the same number of calories.
Alternaria solani is a fungal pathogen that produces a disease in tomato and potato plants called early blight. The pathogen produces distinctive "bullseye" patterned leaf spots and can also cause stem lesions and fruit rot on tomato and tuber blight on potato. Despite the name "early", foliar symptoms usually occur on older leaves. [3]
While these plants are relatively low maintenance, it’s not unusual for peace lily leaves to turn yellow here and there due to stress, pests, or other issues. This guide explains the most common ...