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Hooded broadcast sprayer for particle drift reduction.

Bruno Canella Vieira1, Maxwel Coura Oliveira1, Guilherme Sousa Alves2

  • 1Department of Agronomy, University of Wisconsin-Madison, Madison, WI, USA.

Pest Management Science
|December 29, 2021
PubMed
Summary

Spray hoods significantly reduce pesticide drift, even with smaller droplets, when used with appropriate nozzles and drift-reducing adjuvants (DRAs). This technology offers complementary benefits for safer pesticide application in agriculture.

Keywords:
drift-reducing adjuvantnozzlespesticide off-target movementshielded sprayer

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Area of Science:

  • Agricultural Engineering
  • Environmental Science
  • Agronomy

Background:

  • Growing interest in spray hoods to minimize pesticide off-target movement.
  • Low historical adoption rates of spray hood technology by farmers and applicators.
  • Need to evaluate effectiveness for modern herbicide applications in dicamba/2,4-D tolerant crops.

Purpose of the Study:

  • To assess the efficacy of spray hoods in reducing pesticide spray drift.
  • To compare drift reduction with different nozzle types and drift-reducing adjuvants (DRAs).

Main Methods:

  • Evaluated spray drift potential of hooded versus conventional open sprayers.
  • Utilized nozzles common for herbicide applications in row crops.
  • Measured drift using area under the drift curve and droplet size analysis (DV50).

Main Results:

  • Hooded applications significantly decreased spray drift across all tested scenarios.
  • Hooded applications with AIXR nozzles showed comparable drift reduction to conventional sprayers with drift-reducing adjuvants (DRAs).
  • Significant differences in droplet size (DV50) did not negate the drift reduction benefits of hoods.

Conclusions:

  • Spray hoods, when combined with proper nozzle selection and DRAs, substantially reduce pesticide drift potential.
  • This technology serves as a valuable complement to existing drift-reduction strategies.
  • Adoption of spray hoods can enhance the safety and environmental profile of pesticide applications.