See:
Fungicide Effectiveness as Seed Treatments for Cereal Diseases
Cause Several soil-inhabiting or seed-contaminating fungi or fungus-like microorganisms such as Pythium abappressorium, Globisporangium irregulare (formerly P. irregulare), G. ultimum (formerly P. ultimum), Fusarium spp., and Rhizoctonia sp. Any soil condition that prevents rapid germination and emergence increases the possibility of seed decay, such as cold, wet, or acid conditions.
Symptoms Seeds may decay in soil, or seedlings may become blighted by underground attack. Stands are thin and uneven or lacking in small to large areas.
Cultural control
- Seed when soil conditions favor rapid germination and emergence.
- Rotations to fallow, legumes, rapeseed, potatoes, and crops other than grass species may help reduce disease severity.
Chemical control Seed treatment is helpful. Selecting the right chemical depends on the history of the field and the fungi involved.
- Acquire (Group 4) at 0.75 fl oz/100 lb seed plus a dye. For control of Pythium and Globisporangium. See label for reentry restrictions.
- Allegiance-FL (Group 4) at 0.75 fl oz/100 lb seed plus a dye. For control of Pythium and Globisporangium. See label for reentry restrictions.
- Apron XL (Group 4) at 0.32 to 0.64 fl oz/100 lb seed plus a dye. For control of Pythium and Globisporangium. See label for reentry restrictions.
- Captan 4F (Group M4) at 3 fl oz/100 lb seed plus a dye. For a broad spectrum of fungi.
- Dividend Extreme (Group 3 + 4) at 2 to 4 fl oz/100 lb seed for spring barley. See label for reentry restrictions.
- Dividend XL RTA (Group 3 + 4) at 5 to 10 fl oz/100 lb seed. Do not graze green barley forage until 30 days after planting. See label for reentry restrictions.
- Dynasty (Group 11) at 0.1 to 3.75 fl oz/100 lb seed plus a dye. Use in combination with other active ingredients labeled for seed treatment. See label for reentry restrictions.
- Intego Solo Fungicide Seed Treatment (Group 22) at 0.2 to 0.3 fl oz/100 lb of seeds. For control of Pythium and Globisporangium. 12-hr reentry.
- Maxim 4FS (Group 12) at 0.08 to 0.16 fl oz/100 lb seed plus a dye. For control of pathogenic Fusarium, Helminthosporium, and Rhizoctonia spp. See label for reentry restrictions.
- Mertect 340-F (Group 1) at 0.03 mg ai/seed (2.6 fl oz/100 lbs seed) plus a dye. To control pathogenic Fusarium spp.
- Raxil PRO MD (Group 3 + 4) at 5 to 7.5 fl oz/100 lb seed. See label for restrictions and application directions.
- Stamina (Group 11) at 0.4 to 0.8 fl oz/100 lb seed plus a dye. Use in combination with other active ingredients labeled for seed treatment.
- 42-S Thiram (Group M3) at 2 fl oz/bu of barley seed. For a broad spectrum of fungi. See label for reentry restrictions.
- Vibrance (Group 7) at 0.08 to 0.16 fl oz/100 lb seed plus a dye. See label for reentry restrictions.