Soil steaming in combination with fungicide drenches may also reduce losses. radicis‐lycopersici was found in the UK in 1988 and 1989 mainly in rockwool‐grown tomato crops. • Symptoms progress up the plant as the yellowed leaves turn brown (Figure 4). It is often hard to diagnose this disease as it is sometimes present at the same time as other soil borne fungi. Southern Florida, for example, is much more likely to experience it than Colorado. Fusarium oxysporium can also cause basal rot in a number of plants. August 15, 2018 Jerry. Check with your seed representative or seed catalog for tomato varieties with resistance to Fusarium crown rot. It is extremely widespread in places with sandy, acidic soil. The use of varieties resistant to Fusarium crown and root rot is generally the most effective way to control this disease. Most tomato varieties with resistance to Fusarium crown rot are indeterminate. For instance, fusarium wilt of tomato is caused by Fusarium oxysporium sp. While that strain may exist in the soil, it will only impact tomatoes. Root Rot Diseases. Fusarium crown and root rot caused by Fusarium oxysporum f. sp. This rot will destroy the root system. Fusarium infections cause the tomato plant’s foliage to yellow and wilt as the plant dies. lycopersici. Fusarium Crown and Root Rot on Tomato SIGNS & SYMPTOMS: • Symptoms on tomato plants first appear as yellowing of the oldest leaves about the time that fruit is nearing maturity. Identification. Growers who plant tomatoes in bags or pots in a high tunnel instead of in the soil should avoid Fusarium crown rot since the fungus survives in the soil. Tomato Fusarium Crown Rot. Other plants are immune to that strain, but not to all other fusarium oxysporium. Fusarium crown rot strikes at the root and wreaks havoc on the entire root system. Fusarium Root Rot Identification and Habitat. Fusarium and phytophthora root rot are the tomato plant’s most common rot diseases.