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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]
Blossom-end rot is another sign of plant disease that may accompany blackheart in the same plant. A black rot originates opposite the stem area of the plant fruit (the "blossom-end"), and spreads over the fruit as a dark, hardened area. The causes of blossom-end rot and blackheart are the same. [citation needed]
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.
Out-of-season tomatoes, often grown in large commercial greenhouses, are all but inedible to the sophisticated tomato-lover's palate. Until now, the reason why out-of-season greenhouse tomatoes ...
A. a. f. sp. lycopersici (AAL) infects only certain cultivars of tomato plants and is often referred to as Alternaria stem canker of tomato. [3] AAL ' s main symptom is cankers in the stem. It resides in seeds and seedlings, and is often spread by spores as they become airborne and land on plants. It can also spread throughout other plants. [4]
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Buckeye rot of tomato is caused by three species of pathogens in the genus Phytophthora: P. nicotianae var. parasitica, P. capsici, and P. drechsleri. [1] It is an oomycete that thrives in warm, wet conditions and lives in the soil. [ 2 ]
If your plant is sporting crispy, dark or brown tips on the leaves, it may mean you need to water more often. Check the soil moisture, and slowly reduce the number of days in between watering.