This factsheet summarized ten common plant diseases that are also relatively easy to identify on your own.
What is bacterial wilt? Bacterial wilt is a common and destructive disease that affects cucurbits (i.e., plants in the cucumber family), including economically important crops such as melon (Cucumis melo), cucumber (Cucumis sativus) and, to a lesser extent, squash and pumpkin (Cucurbita spp.). This disease is distributed throughout the United States; and can be found anywhere that cucurbits are grown.
Tomato spotted wilt is a common viral disease of worldwide distribution that can affect over 1000 plant species. Economically important hosts include a wide range of vegetables, fruits, field crops, and ornamentals. Many weeds are also potential hosts.
Squash bugs are an emerging problem in Wisconsin. In recent years, these insects have become more prevalent, causing damage to vine crops in home gardens and commercial fields alike. Squash bugs feed on all vine crops, but pumpkins and squash are their preferred hosts. This factsheet covers identification, life cycle, management and more.
Diseases of vegetable plants can pose a challenge for the home gardener. While cultural methods are the preferred options for disease management in home vegetable gardens, if diseases become problematic, fungicide treatments are also an option. This guide will help identify some of the common, and most suitable, fungicides.
Aphids are soft-bodied, sucking insects that are sometimes called plant lice. They feed on plant sap and subsequently excrete a sugary substance (called honeydew) that can attract ants as well as support the growth of a saprophytic fungus called sooty mold. Learn about common aphids found in home gardens in this factsheet.
Growing vegetables from seed is a common practice for many home gardeners. Unfortunately, vegetable seed can sometimes be contaminated with disease-causing organisms, particularly disease-causing bacteria. Learn how to use hot water treatment to reduce pathogens that may be carried on seeds in this guide.
Bacterial spot of tomato is a potentially devastating disease that, in severe cases, can lead to unmarketable fruit and even plant death. Bacterial spot can occur wherever tomatoes are grown, but is found most frequently in warm, wet climates, as well as in greenhouses. Symptoms and management are covered in this factsheet.
Bacterial speck is a common disease of tomato that occurs worldwide. The disease can substantially reduce yield when it severely affects leaves early in the growing season, and can have an even greater impact on quality when symptoms occur on tomato fruit. Learn about this disease and ways to prevent it in this factsheet.
Cucumber mosaic is a viral disease of worldwide distribution that affects over 1200 plant species. Hosts include a wide range of fruits, vegetables, herbaceous and woody ornamentals, and weeds. This factsheet covers identification and ways to prevent this incurable disease.
Basil downy mildew is a devastating disease that affects the leaves, branches, and stems of many types of basil (i.e., plants in the genus Ocimum) commonly used for cooking. This factsheet describes symptoms and how to avoid problems with this disease.
This handy chart lists pesticides that are most effective against common greenhouse pests such as aphids, scales, leafminers, spider mites, and thrips. Formulation, effectiveness, cautions, and other details are provided.