Open AccessEvaluation of spray drift in potatoes using various spray delivery systems
Author(s) -
R.L. Roten,
J.C. Ferguson,
A.J. Hewitt
Publication year - 2014
Publication title -
proceedings of the new zealand weed and pest control conference/new zealand plant protection/proceedings of the ... national weeds conference/proceedings of the new zealand weed control conference/proceedings of the new zealand plant protection conference
Language(s) - English
Resource type - Journals
eISSN - 0370-2804
pISSN - 0370-0968
DOI - 10.30843/nzpp.2014.67.5780
Subject(s) - sprayer , nozzle , spray nozzle , deposition (geology) , spray characteristics , canopy , airflow , environmental science , materials science , zoology , biology , agronomy , botany , engineering , mechanical engineering , paleontology , sediment
Spray deposition has previously been studied within a potato canopy In a followup study spray drift was evaluated using three treatments from the previous research plus two treatments encompassing an additional grower standard and a spray drift standard Treatments included (1) an airassisted Gambetti sprayer with fullcone nozzles applying spray at a rate of 400 litres/ha (2) a rotary atomizer spraying system (Proptec) applying spray at a rate of 200 litres/ha (3) a dropleg application spraying above (25) and below canopy (75) at 260 litres/ha (4) a conventional hydraulic nozzle spray boom with Guardian AIRtrade; Twin nozzles applying 200 litres/ha and (5) a conventional hydraulic nozzle spray boom with standard 11003 nozzles at 300 litres/ha Data were normalized per nozzle and application rate (200 litres /ha) With the exception of the Gambetti application results indicated a similar pattern with very low deposition beyond 10 m downwind The Gambetti results showed very low deposition near 0 m and spray cloud reaching 40 m but it is believed that the turbulent airflow from the Gambetti sprayer adversely affected the deposition samplers through a high level of disturbance so more data are necessary for further analysis of this effect