Corn row spacing impacts rates of in-furrow fungicide applications
CPN 2016. Published April 21, 2021. DOI: Doi.org/10.31274/cpn-20210423-1
Kiersten Wise, University of Kentucky; Tom Allen, Mississippi State University; Trey Price, LSU AgCenter; and Daren Mueller, Iowa State University.
As corn planting begins across the United States, there are questions about how corn row spacing impacts rates of in-furrow fungicide, particularly with the fungicide product Xyway (flutriafol; FMC). Xyway is applied in-furrow and labeled for management of foliar diseases such as gray leaf spot and northern corn leaf blight, among others. However, it is important to note that rates of application differ depending on row spacing of corn. A commonly promoted rate of Xyway is 15.2 fl oz/A; however, this rate is for corn planted on 30-inch row spacings. Depending on geography, planter restrictions, or cropping system, narrow or wider row spacings may be used. Because the rate of Xyway is based on amount of product per linear foot, the use rate will be dictated by the desired row spacing, with rates ranging from 0.44 fl oz/1,000 linear ft to 0.87 fl oz/1,000 linear ft. A publication that describes this concept further and provides information on how to calculate the amount of fungicide based on row spacing is available here through Mississippi State University.
If using Xyway in-furrow in corn:
- Check the label carefully and calculate the use rate per 1,000 linear ft based on row spacing.
- The current Xyway label restricts the maximum amount of flutriafol that can be applied per season.
- Narrow-row corn will have a reduced rate of Xyway because there are more linear feet of row per acre in narrow-row corn, and the label restricts the amount of flutriafol that can be applied per season.
- Always check the label for use directions and restrictions. If there are questions about how row spacing influences use rates of Xyway, check with your local University Extension personnel, or your local FMC representative.
Xyway, a fungicide applied in-furrow, is labeled for management of certain corn foliar diseases such as gray leaf spot, which is shown here.Image: Adam Sisson
Catchot et al., 2016. Pesticide Calibration Made Easy. Mississippi State University Extension. Article
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