SciELO - Scientific Electronic Library Online

vol.21 issue2Criteria for evaluation of the leaching potential of herbicides used in ParanáPhytoremediation of herbicide-polluted soils author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Planta Daninha

Print version ISSN 0100-8358On-line version ISSN 1806-9681


CUNHA, J.P.A.R.; TEIXEIRA, M.M.; COURY, J.R.  and  FERREIRA, L.R.. Evaluation of strategies to reduce pesticide spray drift. Planta daninha [online]. 2003, vol.21, n.2, pp.325-332. ISSN 0100-8358.

Pesticide spray drift is a major problem in agriculture today. Among the factors influencing drift, droplet size is of paramount importance. Thus, this work aimed to evaluate the effects of adding emulsifying vegetable oil to the pesticide emulsion and using low drift nozzles on droplet spectrum formation and, consequently, on the drift potential of fan spray nozzles. Droplet distribution was measured under controlled atmosphere, using a real time laser particle size analyzer. The droplets were generated with standard nozzles, with and without the addition of adjuvants, and with low drift nozzles, with the operating pressure ranging from 200 to 400 kPa. Also, drift was evaluated in the field, using artificial targets placed outside the application area, where droplet counting was accomplished. The results showed that both the addition of vegetable oil to the pesticide emulsion and the use of low drift nozzles altered droplet size spectra, increasing the diameter of the drops and reducing the percentage of drops subject to wind action being, thus, effective factors in drift reduction.

Keywords : application technology; nozzles; adjuvants; droplets.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License