Typhula Blight Severity as Influenced by the Number of Preventive Fungicide Applications and Snow Compaction

Fig. 3. Typhula blight severity on a Kentucky bluegrass (Breckenridge, CO) or an annual bluegrass (Vail, CO) fairway in April following a single application (rates/1000 ft²) the first week in November, and before snow cover, of the systemic fungicide thiophanate-methyl commercially mixed with the contact fungicide chlorothalonil (Spectro 90WDG, 4.0 oz,), compared to plots receiving the same treatment the last week of September or the first week in October followed by a November application of Spectro 90WDG (5.8 oz, 2004-2005) plus the systemic fungicide tebuconazole (CL-EXP-4, Cleary Chemical, 1.0 oz,, Vail and Breckenridge, 2004-2005a), or the locally systemic fungicide polyoxin (Endorse 2.5 WP, Cleary Chemical, 4.0 oz, Vail and Breckenridge, 2004-2005b) or thiophanate methyl commercially mixed with locally systemic fungicide iprodione (Cleary’s 26/36, Cleary Chemical, 4.0 fl oz, 2006-2007) plus chlorothalonil (Daconil Ultrex, Syngenta Professional Products, 82.5WDG, 5.5 oz, 2006-2007). There was less Typhula blight (*P < 0.05) in plots receiving two applications of fungicides in 2006-2007, but not on other dates based on paired T tests. Lines indicate standard errors.



Image from Plant Health Progress article:
Typhula Blight Severity as Influenced by the Number of Preventive Fungicide Applications and Snow Compaction