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Symptoms on Tomato Leaf. Photograph provided by Elizabeth Bush, Virginia Polytechnic Institute and State University. The tomato leaf mold fungus is a specific pathogen that only infects tomatoes, mainly in greenhouses. The symptoms of this disease commonly occurs on foliage, and it develops on both sides of the leaf on the adaxial and abaxial ...
Viral and viroid diseases Common mosaic of tomato (internal browning of fruit) Tobacco mosaic virus (TMV) Curly top: Curtovirus: Potato virus Y Potato virus Y: Pseudo curly top Tomato pseudo-curly top virus: Tomato bushy stunt Tomato bushy stunt virus: Tomato etch Tobacco etch virus: Tomato fern leaf Cucumber mosaic virus: Tomato mosaic Tomato ...
Darkening lesions on tomato leaves Advanced necrosis on tomato leaf. Stemphylium solani is of greatest concern in tomatoes, potatoes, peppers, garlic, onions, and cotton, though a wide range of over 20 species have proven susceptible. In tomatoes and potatoes, the resulting disease is known as grey leaf spot. In alliums it is known as leaf ...
Symptoms of TYLCV infection include severe stunting, reduction of leaf size, upward cupping/curling of leaves, chlorosis on leaves and flowers, and reduction of fruit production. This virus can cause significant yield losses from 90–100%, and it is estimated that about 7 million hectares can experience TYLCV infection or mixed virus ...
Septoria lycopersici infects the tomato leaves via the stomata and also by direct penetration of epidermal cells. [3] Symptoms generally include circular or angular lesions most commonly found on the older, lower leaves of the plant. [1] The lesions are generally 2–5 mm in diameter and have a greyish center with brown margins.
The foliage of affected tomato plants shows mottling, with alternating yellowish and darker green areas, the latter often appearing thicker and raised giving a blister-like appearance. The leaves tend to be fern-like in appearance with pointed tips and younger leaves may be twisted. The fruit may be distorted, yellow blotches and necrotic spots ...
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]
Potato virus Y genus Potyvirus, Potato virus Y (PVY) Sinaloa tomato leaf curl genus Begomovirus, Sinaloa tomato leaf curl virus (TCLV) Tobacco etch genus Potyvirus, Tobacco etch virus (TEV) Tobacco mosaic and Tomato mosaic genus Tobamovirus, Tobacco mosaic virus (TMV) and Tomato mosaic virus (ToMV) Tomato spotted wilt