| Autor: |
W C Hoffmann, Bradley K. Fritz, Ivan W. Kirk |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
2004, Ottawa, Canada August 1 - 4, 2004. |
| DOI: |
10.13031/2013.16132 |
| Popis: |
Development and evaluation of aerial application technologies to enhance the efficacy of fungicides and biological control agents with standard aerial spray rates is a priority research area of the U.S. Wheat and Barley Scab Initiative. Consequently, the ARS Aerial Application Technology research team at College Station, Texas, initiated research to assess aerial spray technologies that could lead to increased spray deposits on wheat heads for Fusarium head blight suppression. The goals of the effort were to: 1) Identify the capability of conventional aerial application practice to deposit sprays on wheat heads and determine the properties of those spray deposits; 2) Determine if the amount of spray deposits on wheat heads can be enhanced through the use of very fine sprays produced by rotary atomizers, and characterize those spray deposits; and 3) Determine if aerial sprays applied from two directions would increase deposits on wheat heads, and characterize those spray deposits. Three large- acreage aerial spray studies were conducted to achieve these project goals. Treatments were applied in randomized blocks with three replications. Multiple sub-samples of wheat heads and artificial collectors were collected and analyzed to characterize spray deposits from the specified treatments. Fluorometry and image analyses were used to quantitate and characterize spray deposits on wheat heads and artificial collectors. Fine droplet spectrum sprays applied with rotary atomizers gave the greatest spray deposits on both wheat heads and artificial samplers. Medium droplet spectrum sprays gave the least deposits on wheat heads regardless of spray rates between 19 and 94 L/ha (2 and 10 gal/acre). Results from these studies on optimizing aerial spray deposits will be implemented in disease control studies to provide guidance for aerial fungicide applications for suppression of Fusarium head blight. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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