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Pycnidia can be found in the center of the said lesions. Pycnidia are fruiting bodies of the fungus. When the lesions become numerous often the leaves turn yellow, then brown, shriveling up and eventually dropping off the plant altogether. [1] Tomato leaf with septoria leaf spot symptoms of dark spots and yellow surrounding region
Pseudocercospora fuligena is a fungal plant pathogen infecting tomatoes. [2] It is the cause of the fungal disease black leaf mold. [3] The fungus was first described in the Philippines in 1938 and has since been reported in numerous countries throughout the tropics and subtropics.
Tomato fern leaf Cucumber mosaic virus: Tomato mosaic Tomato mosaic virus Tomato mottle Tomato mottle geminivirus: Tomato necrosis Alfalfa mosaic virus: Tomato spotted wilt Tomato spotted wilt virus: Tomato yellow leaf curl Tomato yellow leaf curl virus: Tomato yellow top Tomato yellow top virus: Tomato bunchy top: Potato spindle tuber viroid ...
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Tomato leaf mold is a plant disease originated from the South and Central America. [1] In 1883, Cooke first discovered the tomato leaf mold in North Carolina. [ 2 ] This disease is not common on the fruit, but if the control is not run, the foliage can be greatly damaged and result in significant yield losses.
Leaf spots reduce the surface area available on leaves for photosynthesis and so can result in smaller growth and yield of plants. Weakened plants may produce lesser fruit. Virus caused leaf spots reduces chlorophyll in the leaves, resulting in less photosynthetic activity.
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]