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Presentation
Effects of Nozzle Type and Carrier Application on the Control of Leaf Spot Diseases of Soybean
Proceedings of the 2006 ASABE Annual International Meeting
  • H. Mark Hanna, Iowa State University
  • Alison E. Robertson, Iowa State University
  • W. Mark Carlton, Iowa State University
  • Robert E. Wolf, Kansas State University
Document Type
Conference Proceeding
Conference
2006 ASABE Annual International Meeting
Publication Version
Published Version
Publication Date
1-1-2006
DOI
10.13031/2013.20646
Conference Title
2006 ASABE Annual International Meeting
Conference Date
July 9–12, 2006
Geolocation
(45.5282193, -122.66323640000002)
Abstract

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 the plant canopy, and soybean yield.

Droplet size for application treatments generally followed expected manufacturer specifications. Percentage area covered and drops/cm 2 were not statistically different among application treatments except at top of the plant canopy at one site. Percentage area covered and drops/cm 2 were statistically greater at the top of the canopy (17 - 18% coverage) than at the middle or bottom (1 – 8% coverage) at both sites. Foliar disease pressure was light so that yield or disease severity was unaffected by application method or as compared to a check area without application.

Copyright Owner
American Society of Agricultural and Biological Engineers
Language
en
Date Available
2015-04-13
File Format
application/pdf
Citation Information
H. Mark Hanna, Alison E. Robertson, W. Mark Carlton and Robert E. Wolf. "Effects of Nozzle Type and Carrier Application on the Control of Leaf Spot Diseases of Soybean" Portland, OR, United StatesProceedings of the 2006 ASABE Annual International Meeting (2006) p. 061162
Available at: http://works.bepress.com/mark_hanna/87/