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The Affect of Application Volume and Deposition Aids on Droplet Spectrum and Deposition in Broccoli for Aerial Application By Robert E. Wolf Contact: Robert E. Wolf email: rewolf@ksu.edu Summary: A field study was conducted to determine the influence of application volume and deposition aids on droplet spectrum and deposition in broccoli for a fixed wing aerial application. The study involved using a turbine powered aircraft to apply four products and product combinations designed to improve deposition in three, five, and ten gallon per acre tank mix solutions. A tank mix of water and crop oil concentrate was used as a comparison base. Kromekote paper was used to collect the data at low, medium, and high positions in a full canopied broccoli crop. Comparisons were made using DropletScan software to calculate droplet statistics and percent area coverage. It is hoped to determine if differences occur in deposition of crop protection products into a dense vegetable crop canopy. Percent area coverage was used to compare treatments. It is also expected that these same products will influence the critical droplet spectrum characteristics such as VMD (V(0.5), Volume Median Diameter), V(0.1), and V(0.9). This study has also been designed to see if any differences can be measured as a result of increasing the application volume. Application volumes compared were three, five, and ten gallons per acre.
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