Does Winter Wheat Yield Response to Fungicide Application Depend on Nitrogen Management?

Nitrogen and fungicide are among the more important management tools to increase wheat (Triticum aestivum L.) grain yield in Kansas. However, there is limited information on whether hard red winter impacted by interaction of nitrogen rates foliar application. Thus, our objective was evaluate effects different N with or without a application at Feekes 10.5 two genotypes contrasting disease resistances leaf stripe rust. Eleven field experiments were established across Kansas using factorial structure options (either no 13 fl oz Nexicor per acre), five (0, 30, 60, 90, 120 pounds (Larry Zenda) split-split plot design during 2021–2022 growing season. There significant between genotype environment where Larry out-yielded Zenda anywhere from 3.1 15 bu/a. rate environment, likely due initial soil NO3-N potential, as ranged less than 34 81 Increases fractions canopy cover response fertilization explained about 29% 15% increases yield, respectively. slightly greater crop supply increased, nearly null difference low much 5.9% for total 160.7 lb N/a. In dry conditions minimal incidence, availability differed each but only marginal fungicide.