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Yellow (Winter) Patch (Rhizoctonia spp) |
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| Symptoms: leaves become etiolated
and turn yellow. Round shaped patches 8-20 inches (200-500 mm)
diameter. Halo pattern. Weak pathogen. Temperature range: 50-59
F (10-15C).Loses pathogenicity at >77 F (25 C). Cultural control: apply PGRs late fall/early winter low nitrogen level remove excess thatch maintain moist root zone cytokinin or gibberillin application avoid fungicide applications during winter dormancy |
Fungicides: polyoxin Zn salt
(Endorse) flutolanil (ProStar)—early to mid-fall pyraclostrobin (Insignia) |