| Experiments were conducted to evaluate Proceed Plus (prothioconazole & tebuconazole & metalaxyl & clothianidin), bixafen, Prosaro (prothioconazole & tebuconazole), Baythroid XL (beta-cyfluthrin), with 'Glenn' and 'Oklee' hard red spring wheat cultivars in a systematic, multichemical program approach for management of tan spot disease and fusarium head blight, both fungal diseases of wheat. The addition of a late fungicide (Feekes 10.51 = flowering stage of wheat) generally lowered tan spot compared to treatments without the late fungicide. Fusarium head blight incidence, severity, and index was generally lower with a late fungicide application. Grain yield was lowest with the control treatment (3900 kg ha-1) and highest with the treatments including seed treatment, herbicide, early fungicide, late fungicide, and late insecticide (4400 kg ha-1). The same was true with test weight (786 g/L vs. 801 g/L). Additional experiments were conducted to evaluate early tan spot control in 'Alsen', hard red spring wheat, with bixafen fungicide compared to industry standard products applied at the tillering stage of wheat. Tan spot control with Alsen was not significantly different among treatments. Grain yield was highest with the fenoxaprop-p-ethyl & pyrasulfotole & bromoxynil & mefenpyr safener plus pyraclostrobin (3710 kg ha-1 ) treatment and the lowest with propoxycarbazone-sodium & mesosulfuron-methyl plus 30g ai/ha-1 of bixafen (3400 kg ha -1) treatment. Although objectives were met in both studies, the research pointed the way toward necessary future research. |
