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Nozzle and Carrier Application Effects on Control of Soybean Leaf Spot Diseases
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: 2007 ASAE Annual Meeting 071150.(doi:10.13031/2013.22919)
Authors: H Mark Hanna, Alison E Robertson, W Mark Carlton, Robert E Wolf
Keywords: air-assist, application, disease, fungicide, nozzle tip, soybean, canopy penetration
A two-site, two-year field application experiment investigated fungicide coverage in a fully-developed soybean canopy. Application treatments included “high-rate” (187 l/ha; 20 gal/acre) and “low-rate” (112 l/ha;12 gal/acre) with fine-droplet two-orifice tips, medium-droplet two-orifice tip at 187 l/ha (20 gal/acre), a coarse-droplet single-orifice “herbicide-style” tip at 168 l/ha (18 gal/ac), and an air-assisted spray treatment. Droplet coverage and size, and foliar disease severity in the lower, middle, and top parts of the plant canopy, and crop yield were measured.(Download PDF) (Export to EndNotes)