This publication was produced by the Agricultural Extension Service of the University of Tennessee. It was written by Steve Bost, Professor of Entomology and Plant Pathology, and R. Allen Straw, Assistant Professor of Plant Sciences and Landscape Systems. While this publication is geared toward strawberry plant diseases in Tennessee, many strawberry diseases are widespread. Consequently, the material contained within this document will be of assistance to any strawberry grower whose strawberry plants are suffering from infections.
The publication contributes the following information:
1. A very brief description of the two major methods of growing strawberries today. Publications outside the focus of this publication are also referenced for both small-scale and commercial growers looking for chemical pest control guidance.
2. A discussion of the strawberry plant disease anthracnose. The fungus Colletotrichum is responsible, with the species C. acutatum being predominant. The progression of infection is discussed, and pictures of anthracnose infection on each of the strawberry plant parts and the strawberry itself are presented. Also discussed are the conditions in which anthracnose thrives, how to prevent its spread, and how to avoid contamination.
3. A discussion of the strawberry plant disease gray mold, which is the most common strawberry fruit rot. It is caused by the fungus Botrytis cinerea and is very common due to the fact that it is spread via the air. The parts of the strawberry plant most commonly affected are discussed. Also discussed are how to prevent infection, varieties resistant to it, and optimal spraying times.
4. A discussion of the strawberry plant disease leather rot, which is caused by Phytophthora cactorum. Strawberries infected with leather rot can appear normal while tasting bitter. Foods made from these strawberries would be unpleasant (bitter jams or jellies). How to avoid infestation is presented along with photos of infected fruit.
5. Strawberry plant leaf diseases are also reviewed. Leaf blight, leaf scorch, common leaf spot, and angular leaf spot are discussed. Pictures of each are presented to aid in the correct diagnosis. The causative organisms are also listed. The specific parts of the leaves where infestation is most common is mentioned as well as the climactic conditions that are favorable to the causative organisms.
6. The following strawberry root and crown diseases are presented: red stele (Phytophthora fragariae), Phytophthora
crown rot (Phytophthora cactorum), and Verticillium wilt (Verticillium alboatrum). The conditions in which these infestations flourish are discussed as are the symptoms of infection. Photographs of strawberry diseases are present.
7. A table of commonly grown strawberry varieties in Tennessee is useful for quickly determining strawberry resistance and susceptibility to the various pathogens previously discussed.
If you are interested in learning more about strawberries and diseases, see the Strawberry Plant reference page. To learn more about specific cultivars, see the Strawberry Varieties reference page. To find out which strawberry variety would grow well in your area, see here: Recommended Strawberry Varieties by State.
File Type: .pdf
Length: 6 pages