ISHS Acta Horticulturae 372: Symposium on Engineering as a Tool to reduce Pesticide Consumption and Operator Hazards in Horticulture
INFLUENCE OF DRIFT RETARDANT CHEMICALS ON SPRAY DROPLET SIZE, PATTERN AND DRIFT |
| Authors: | H. Erdal Ozkan, H. Zhu, Donald L. Reichard |
| Abstract:
Objectives of this study were to determine the effects of various drift retardant chemicals on droplet size, spray pattern, and spray drift reduction of sprays from an XR 8004VH fan-pattern nozzle. Results indicated that, at recommended rates, Nalco-trol provided the largest increase in volume median diameters of the sprays followed by Direct, Target, Driftgard, and Formula 358. All drift retardants created patterns with greater volume toward the center than sprays of water only. Cumulative deposits beyond 0.5 m downwind increased for all drift retardants when the wind velocity was increased from 2.0 to 4.0 m/s. The least amount of downwind deposit beyond 0.5 m at 4.0 m/s was with Nalco-trol followed by Target, Driftgard, Direct and Formula 358. | |
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