Diseases of TomatoesĪnthracnose (fungi: Colletotrichum spp.) is primarily a problem on fruit that is ripe (or overripe), although leaves, stems, and roots may become infected. Common disorders in tomatoes are, however, described in MSU Extension Publication 2975 Tomato Troubles: Common Problems of Tomatoes.
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To learn about common diseases of tomatoes that more commonly occur in greenhouses and how to manage them, see MSU Extension Publication 1861 Greenhouse Tomatoes: Pest Management in Mississippi.Īdditionally, while some disorders are often mistaken to be diseases or are sometimes referred to as abiotic (nonliving) diseases, disorders are also not described in this publication. While the information in this publication may be relevant to tomato production and disease management in any location, this publication does not focus on methods that pertain to managing diseases of tomatoes in the greenhouse. Additionally, some disease management methods for tomatoes grown in greenhouses are unique to those structures since the environment in these structures can be manipulated. Notes: Many diseases of tomatoes occur both in the field and in enclosed structures however, because of the unique nature and environmental conditions present in enclosed structures, some diseases are more common in these structures, whereas others are more common in the field. General disease management methods that can be used to prevent or reduce disease are also described following the descriptions of the common diseases. These terms are formatted in bold italics at their first mention within the text and are defined in the Glossary of Plant Pathology Terms at the end of this publication. Several plant pathology-related terms are used in these descriptions. This publication provides information on many of the most common diseases of tomatoes that occur in Mississippi, as well as descriptions of the signs (the visible presence of a pathogen) and symptoms (a plant’s reaction to infection with a pathogen) associated with those diseases. Identifying the cause of a problem is necessary before appropriate management methods can be taken. A few fungus-like organisms ( oomycetes) commonly called water molds also cause troublesome diseases in Mississippi.ĭiagnosis is the first step in disease management. Many of the most common diseases that affect tomatoes in Mississippi are caused by various fungi, bacteria, and viruses.
A number of disease-causing organisms ( pathogens) can infect tomatoes and cause disease.
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