Improving coverage in horticulture and viticulture

Sprayer with broom

A new project commenced in 2013 to investigate the use of drift reducing technologies (DRTs) in viticulture.  The project is examining the effect of droplet size, volume rate, the use of targeted air and enhanced spreading with formulation chemistry on spray coverage efficacy and spray drift management.

The findings from this project will significantly contribute to the NWPPA knowledgebase in the area of performance of spray drift mitigating technologies in broad acre, horticulture and viticulture industries.

Project updates

A 5-year project to investigate the use of DRTs in viticulture facilitated by the Grape and Wine Research Development Corporation (GWRDC) and endorsed by the NWPPA is now underway. The project is examining the effect of droplet size, volume rate, the use of targeted air and enhanced spreading with formulation chemistry on spray coverage efficacy and spray drift management. In particular, the research on vineyard spraying is:

  • examining efficacy (through uniform, optimized coverage) but without drift exposure or loss to the ground through excessive runoff
  • determining baseline reference sprayer performance against which DRTs can be compared
  • using wind tunnel facilities to screen for nozzles and adjuvants and then testing the best systems in the field.

Current DRTs under investigation include:

  • targeted air
  • alternative sprayers; electrostatics and recapture-recycle sprayers
  • single versus multi-row sprayers
  • current sprayer adjustments; optimized air volume, direction, velocity and turbulence
  • droplet size optimisation; adjuvants, nozzles, etc.

The findings from this project will significantly contribute to the NWPPA knowledge base in the area of performance of spray drift mitigating technologies in broad acre, horticulture and viticulture industries.

The project will focus upon DRTs for buffer zone minimisation and the evaluation of distance-based calibration for optimised dose delivery.

A project to investigate the use of DRTs in viticulture commenced in June, facilitated by the GWRDC.  The project is examining the effect of droplet size, volume rate, the use of targeted air and enhanced spreading with formulation chemistry on spray coverage efficacy and spray drift management.

The findings from this project will significantly contribute to the NWPPA knowledge base in the area of performance of spray drift mitigating technologies in broad acre, horticulture and viticulture industries. The project will focus upon DRTs for buffer zone minimisation and the evaluation of distance-based calibration for optimised dose delivery.