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2006

Iowa State University

Agricultural Science

Air-assist

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Effects Of Nozzle Type And Carrier Application On The Control Of Leaf Spot Diseases Of Soybean, H. Mark Hanna, Alison E. Robertson, W. Mark Carlton, Robert E. Wolf Jan 2006

Effects Of Nozzle Type And Carrier Application On The Control Of Leaf Spot Diseases Of Soybean, H. Mark Hanna, Alison E. Robertson, W. Mark Carlton, Robert E. Wolf

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Midwestern soybean growers seek information on effective application of foliar fungicides that do not translocate throughout the plant. Field application treatments included using a two-orifice nozzle tip producing fine droplets at 187 l/ha (20 gal/ac) and 112 l/ha (12 gal/ac) and a single-orifice nozzle tip producing a coarse droplet size more typical of herbicide applications at 168 l/ha (18 gal/ac). In addition an air-assisted sprayer was used at one of the two sites of the trials. Measurements included droplet size, droplet coverage, and foliar disease severity in the top, middle, and lower parts of ...