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Browse by Author: Frank Louws
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Botrytis Fruit Rot / Gray Mold on Strawberry

By: Frank Louws, Garrett Ridge, Jean Harrison

Botrytis rot, or gray mold as it is often called, is a serious disease in all strawberry production areas and is a disease of concern in most years. The disease is a problem not only in the field, but also during storage, transit, and marketing of strawberry fruit, due to onset of severe rot as the fruits begin to ripen. Other parts infected by the fungus include leaves, crown, petals, flower stalks, and fruit caps.

Anthracnose Fruit Rot of Strawberry

By: Frank Louws, Garrett Ridge, Jean Harrison

Anthracnose is an important disease of strawberry with all parts of the plant (fruit, crowns, leaves, petioles and runners) being susceptible to the disease. Disease control is difficult when environmental conditions are favorable for disease development and if inoculum is present. The disease can be especially destructive to susceptible California strawberry cultivars (e.g. Chandler, Camarosa, Albion) when grown on black plastic.

Growing Raspberries in North Carolina

By: Gina Fernandez, Frank Louws, Jim Ballington, Barclay Poling

This publication for commercial raspberry growers describes how to improve raspberry production. It includes information on varieties, growth and development.

Powdery Mildew of Strawberry

By: Frank Louws, Garrett Ridge

This factsheet discusses the symptoms and treatment of powdery mildew in strawberries.

17. Organic Gardening

By: Aimee Colf, Lucy Bradley, Frank Louws, David Orr

This organic gardening chapter from the Extension Gardener Handbook provides systematic approach to fertilization, soil, and pest management that views a garden as a working ecosystem.

Phytophthora Crown Rot of Strawberry

By: Frank Louws, Garrett Ridge

Diagnostic procedures and treatment of phytopthora crown rot of strawberry are discussed in this factsheet.

Black Root Rot of Strawberry

By: Frank Louws

Black root rot is caused by a complex of pathogens. These pathogens cause damage to the root structure reducing the fibrous structure and turning roots black. Dysfunctional roots leads to plant stunting and decreased yields.

Anthracnose Crown Rot of Strawberry

By: Frank Louws, Garrett Ridge, Jean Harrison

Anthracnose crown rot is caused by the pathogen Colletotrichum gloeosporioides. This disease can cause significant economic damage to strawberry nursery and fruit production systems, particularly in the southeastern production region. This article highlights the symptoms and signs of the disease, disease cycle, methods for diagnosis and integrated management recommendations.

Phomopsis Leaf Blight of Strawberry

By: Frank Louws, Garrett Ridge

This factsheet covers Phomopsis leaf blight, a fungus that causes lesions and defoliation in strawberries.

Angular Leafspot of Strawberry

By: Frank Louws, Jean Harrison, Garrett Ridge

Angular leaf spot is caused by the bacteria Xanthomonas fragariae and occurs frequently in North Carolina and surrounding states. The pathogen is introduced on infected plant material and is difficult to control but economic damage is often low.

Leaf Scorch of Strawberry

By: Frank Louws, Garrett Ridge

This factsheet covers leaf scorch, a fungus that weakens strawberry leaves and plants.

Leather Rot of Strawberry

By: Frank Louws, Garrett Ridge

Leather rot, though occurring rarely in North Carolina, can cause substantial losses of fruit yield. This factsheet covers the identification and control of the disease.

Alternaria Black Spot of Strawberry

By: Frank Louws

This fachseet offers information on alternaria black spot of strawberry, a fungus that grows on injured fruit.

Insect and Disease Control of Fruits

By: Jim Walgenbach, Hannah Burrack, Bill Cline, Dave Ritchie, Frank Louws, Sara Villani, M. Nita, Guido Schnabel, Chuck Johnson

This publication covers insect and disease control in apples, blueberries, caneberries, grapes, peaches, pecans and strawberries.

Strawberry Viruses

By: Frank Louws, Garrett Ridge

This publication discusses the signs and symptoms as well as management of a variety of strawberry viruses including Strawberry Mild Yellow Edge, Strawberry Mottle Virus and Raspberry Ringspot Virus.

Grafting for Disease Resistance in Heirloom Tomatoes

By: Frank Louws, Cary Rivard

Learn about grafting techniques that growers can use to unite the disease resistance and enhanced vigor of hybrid tomato cultivars with the high fruit quality of heirloom varieties. The authors describe the benefits of grafting and provide a step-by-step guide to grafting tomato transplants, healing and acclimating them to growing conditions and planting them in the field.

Gnomonia Leaf Blotch and Stem-End Rot of Strawberry

By: Frank Louws, Garrett Ridge

Gnomonia causes leaf blotch and stem-end rot of strawberry. The pathogen typically is introduced on transplant material and can build up in plug facilities and in fruiting fields. It rarely becomes an economic concern.

Gray Mold / Crown Rot of Strawberry

By: Frank Louws

This factsheet describes the signs and symptoms, as well as control, of Botrytis crown rot in strawberry production.

Southern Stem Blight of Strawberry

By: Frank Louws, Garrett Ridge

The symptoms and treatment techniques of southern stem blight in strawberries are discussed in this factsheet.

Phytoplasma of Strawberry

By: Frank Louws

This publication offers information on phytoplasmas, organisms that multiply in the phloem of strawberry plants and are carried from plant-to-plant by leaf hoppers (vectors).