Effects of Foliar Fungicide and Insecticide Applications on Soybean in Ohio

• DOI: 10.1094/php-2010-0122-01-rs
• Publication Date: 2010-02-16T02:31:32Z
• Authors: A. E. Dorrance; C. Cruz; D. Mills; R. Bender; M. Koenig; G. LaBarge; R. Leeds; D. Mangione; G. McCluer; S. Ruhl; H. Siegrist; A. Sundermeier; D. Sonnenberg; J. Yost; H. Watters; G. Wilson; R. B. Hammond
• Keywords: Headline; Growing season

Mid-season applications of Quadris with and without Warrior insecticide were evaluated in 2004 2005, Headline, Folicur, Domark, or Headline plus Folicur 2006, 2007, 2008 37 farm scale studies Ohio. Producer cooperators selected fields, applied treatments at growth stage R3 harvested fields. Each trial was rated R5 R6 for incidence severity brown spot frogeye leaf spot. Aphids foliar disease low 2004. Soybean aphids counted 2005. Brown reduced significantly by seven the 13 locations. In absence soybean aphid, a single application fungicide(s) increased yield only six 28 locations, which three had increases greater than 4.2 bu/acre. Populations high during 2005 nine an eight These data indicated that diseases contribute to loss soybeans. However, more are required determine action thresholds Accepted publication 14 October 2010. Published 22 January