CORN RESPONSE TO FOLIAR FUNGICIDE AND PRE-HARVEST DESICCANT
Applied Research
Gregory Endres
Extension Cropping Systems Specialist
NDSU Extension
CARRINGTON
Abstract
Farmers are interested in potential increase in corn yield with fungicides in the absence of foliar disease. Also, interest exists with use of a pre-harvest desiccant to hasten corn drying and harvest. A field study is being conducted by North Dakota State University to examine corn response to a foliar fungicide and pre-harvest desiccant. Experimental design was a randomized complete block with four replications. Trials were conducted at Carrington and Prosper, ND in 2008 and 2009 with early- and late- maturing hybrids at each location. Best management practices were used for corn production. Headline fungicide was applied at 6 fl oz/acre during tassel to early-silk stages of growth. Gramoxone Inteon (paraquat) herbicide was applied at 32 fl oz/acre at physiological maturity. Fungicide use resulted in a yield increase of 10 bu/acre (8%) compared to the untreated check in one of four site-years (Carrington, 2008). Average yield with Headline was 3 bu/acre (2%) greater than the untreated check across site-years. Grain moisture was reduced 1.3 percentage points with the desiccant compared to the untreated check during one of four site-years (Prosper, 2008), while yield was similar among all trials. Fungicide, desiccant, and hybrid interactions were statistically non-significant among grain yield, moisture and test weight. The current results of this study indicate a consistent and positive corn response is not likely with use of these input strategies.
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Authors: G.E. Endres, J.K. Ransom
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Endres, G. Area Extension Specialist/Cropping Systems, NDSU Extension Service, North Dakota, 58421
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Ransom, J. Agronomist - Cereal Crops, NDSU Extension Service, North Dakota, 58108