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Tomato gray mold, caused by the fungus Botrytis cinerea, is a common disease that affects tomato plants, especially in humid and wet conditions. Recognizing the symptoms early can help prevent significant crop loss.
Signs and Symptoms of Tomato Gray Mold
The most recognizable symptom of tomato gray mold is the appearance of fuzzy, grayish mold on affected plant parts. This mold often appears as a thin, velvety layer that can cover leaves, stems, and fruit.
On Leaves
Infected leaves develop water-soaked spots that quickly turn brown or gray. The mold can spread rapidly, causing the leaves to wilt and die. You may notice a fuzzy gray or brown mold covering the leaf surface.
On Stems
Stems may develop dark, sunken lesions with a fuzzy gray mold growing on the surface. This can weaken the plant’s structure and lead to stem breakage or plant death if untreated.
On Fruit
Tomato fruit infected with gray mold shows soft, sunken spots that are often covered with a gray, fuzzy mold. The affected areas may become moldy and rot, making the fruit unmarketable and spreading the disease further.
Additional Symptoms and Signs
In humid conditions, the mold can spread extensively, covering large areas of the plant. You might also notice a musty odor associated with the mold growth. The disease tends to develop quickly under favorable conditions, leading to rapid crop deterioration.
Conclusion
Early detection of gray mold symptoms is crucial for effective management. Regularly inspect your tomato plants for fuzzy gray mold, especially during wet or humid weather. Prompt removal of infected plant parts and proper cultural practices can help control the spread of Botrytis cinerea.