Entire root system is affected. Brown discoloration is obvious at the base of the stem. Disease progresses slowly from bottom to top, sometimes causing wilting. Disease is widespread in tomato-growing regions.
Use Trichoderma harzianum as a soil drench to suppress root pathogens on newly sown seeds, transplants and established plants. We recommend Root Guardian Biofungicide for Soilborne Diseases. Maintaining soil pH at 6.5 to 7.0 helps. Test soil pH; if it is too acid, use Quik-Cal Pelletized Calcium to raise pH. Follow up with foliar sprays of a harpin protein-based product every 7-10 days. We recommend Green Guard™ Plant Growth Enhancer.