Search Plant Disease Handbook

Turnip and Rutabaga (Brassica spp.)-Damping-off March 2023 See: Broccoli (Brassica oleracea)- Damping-off Chemical control Seed treatment. Allegiance-FL (Group 4) at 0.75 fl oz/100 lb seed plus a dye can be used where Pythium spp. are a problem. See label ...

Turnip and Rutabaga (Brassica spp.)-Chlorotic Leaf Spot (Light Leaf Spot) March 2023 See: Seed Crop, Crucifers (Brassica, Eruca, and Raphanus spp.)- Chlorotic Leaf Spot (Light Leaf Spot) By C. M. Ocamb Cause The fungus, Cylindrosporium concentricum (sexua ...

Turnip and Rutabaga (Brassica spp.)-Powdery Mildew March 2023 Cause The fungus, Erysiphe cruciferarum (syn. E. polygoni), can infect most crucifer crops and cruciferous weeds, but strains exist that have specificity and will infected only a subset of the ...

Turnip and Rutabaga (Brassica spp.)-Sclerotinia Stem Rot and Watery Soft Rot March 2023 See: Seed Crop, Crucifers (Brassica, Eruca, and Raphanus spp.)- Sclerotinia Stem Rot By C. M. Ocamb Cause Sclerotinia sclerotiorum is a cosmopolitan fungus that occurs ...

Turnip and Rutabaga (Brassica spp.)-White Leaf Spot and Gray Stem March 2023 See: Seed Crop, Crucifers (Brassica, Eruca, and Raphanus spp.)- White Leaf Spot and Gray Stem By C. M. Ocamb Cause The fungus, Neopseudocercosporella capsellae (formerly Pseudoce ...

Tomato (Solanum lycopersicum)-Bacterial Spot March 2023 Cause Xanthomonas vesicatoria (formerly X. campestris pv. vesicatoria) is a bacterium that overwinters in plant refuse for up to 2 years and can be seedborne. The bacterium infects solanceous weeds s ...

Tomato (Solanum lycopersicum)-Phoma Rot March 2023 Cause The fungus, Phoma destructiva var. destructiva, can infect tomato and peppers and survives in soil or infected plant debris. This fungus can be seedborne in paprika and perhaps other crops in the fa ...

Turnip and Rutabaga (Brassica spp.)-Downy Mildew March 2023 See: Seed Crop, Crucifers (Brassica, Eruca, and Raphanus spp.)- Downy Mildew (Staghead) By C. M. Ocamb Cause Peronospora parasitica (= Hyaloperonospora parasitic a), a fungus-like microorganism t ...

Turnip and Rutabaga (Brassica spp.)-Alternaria Diseases (Black Spot, Gray Leaf Spot, Pod Spot) See: Radish (Raphanus sativus)- Alternaria Diseases (Black Spot, Gray Leaf Spot, Pod Spot) Seed Crop, Crucifers (Brassica, Eruca, and Raphanus spp.)- Alternaria ...

Tomato (Solanum lycopersicum)-Fusarium Wilt (Fusarium Foot Rot) March 2023 See: Tomato (Solanum lycopersicum)- Fusarium Crown and Root Rot Tomato (Solanum lycopersicum)- Tomato Varietal Resistance to Fusarium Wilt and/or Crown and Root Rot. Tomato (Solanu ...