Most Disease-Resistant Tomato Plants
The hundreds of tomatoes available to gardeners base their distinction on several factors, including disease resistance. Common diseases that infect tomatoes include verticillium and fusarium wilts that spread through the soil causing yellow leaves, wilt and death. Other diseases include tobacco mosaic virus, alternaria stem canker and gray leaf spot, all of which spread by various measures and cause blemishes, lesions, discolorations and often death. Some varieties of tomatoes prove more successful in disease resistance than others.
"Neptune," a determinate variety bred specifically tolerate hot, humid conditions and to resist diseases such as bacterial wilt matures within 67 days. Fruits weigh around 1/4 pound and grow in clusters of two to four along 1- to 3-inch long vines. "Neptune" is resistant to verticillium wilt and fusarium wilt. "Neptune" was developed in 1999 by Dr. J. W. Scott at the University of Florida's Gulf Coast Research and Education center.
"Brandywine," an indeterminate 1885 Amish heirloom, produces large (up to 1 pound) pink-red fruit in 80 days. Meaty, intensely flavored fruits grow along sprawling vines. "Brandywine" shows greater disease resistance than most heirlooms, with resistance to tobacco mosaic virus and verticillium wilt. It first appeared in the Seed Savers Exchange collection in 1982.
"Rutgers," a bright red tomato bred in the 1920s, is a determinate variety that matures within 75 days. Rutgers resists cracking and shows disease resistance to alternaria stem canker, fusarium wilt, gray leaf spot and verticillium wilt. "Rutgers" is most often used for canning because of its high production and juicy texture.
Rust Disease On Tomato Plants
Late blight is caused by the Phytophtheora infestans fungus and is a common disease of tomatoes on the West coast of the United States and in locations with high humidity and periods of cool temperatures. Late blight can cause severe losses to tomato crops and spreads easily from infected potato and tomato plants. Root infections are called "black dot root rot." Fusarium wilt is caused by the fungus Fusarium oxysporum f.sp. The leaves on infected branches will yellow, wilt and eventually drop. The verticillium wilt fungus lives in the soil and blocks the water-conducting tissues of the tomato plant, but unlike fusarium wilt, the disease does not show symptoms on one side only. Verticillium-resistant plants are marked with a "V."
- University of Illinois Extension: Tomato
- Organic Gardening: Disease Resistant Tomatoes
- Southern Exposure Seed Exchange: Neptune Tomato
- Victory Seeds: Brandywine and Company: What We Know and What We Don't
- Iowa State University Extension: Tomato Diseases and Disorders
- UC Davis IPM Online: Tomato Anthracnose
- UC Davis IPM Online: Tomato Fusarium Wilt