Effect of Air Assistance, Leaf Area Density and Forward Speed on Spray Deposition in Simulated Crop Canopy
DOI:
https://doi.org/10.52151/jae2004412.1078Abstract
Efficacy of pesticides spraying is influenced by target canopy characteristics, spray equipment, mode of operation and properties of chemical. A simulated crop canopy was constructed to study effect of air velocity, leaf area density (LAD) and forward speed on deposition characteristics of an air assisted spraying system. Results showed that droplet size and droplet density on under side of the canopy was less than that on the upper side. The Air velocity, LAD and forward speed significantly influenced the droplet density on the canopy. While, higher velocities of air stream decreased the spray droplet size, the forward speed and LAD did not influence it.
Downloads
References
Ade, G; Pezzi, F; Cooper, SE; Taylor, WA.; Cross, N (ed.); Gilbert, AJ. (ed.); Glass, C.R. (ed.); Taylor, W.A. (ed.); Walk late, PJ. (ed.); Western, N.M. 2000. The influence of some application variables on spray deposition in field-grown tomatoes. Pesticide application, University of Surrey, Guildford, UK, 1718 January 2000. Aspects-of-Applied-Biology. 57: 225233.
Bhargav, VK2001. Design, development and evaluation of air-assisted boom sprayer for orchard application. Unpub. Ph.D. Thesis, IARI, New Delhi.
Cross, JV; Walklate, PJ; Murray, RA; Richardson, GM.2001. Spray deposits and losses in different sized apple trees from an axial fan orchard sprayer: 1. Effects of spray liquid flow rate. Crop-Protection, 20(1): 13-30.
Cunningham, G; Hughes, P; Harden, J 1998. Tree crop spraying: Pesticide application basics. DPI note on Internet, Department of Primary Industries and Fisheries, Queensland.
Hall, FR; Ferree, DC; Reichard, DL; Kryger, HR 1987. Orchard geometry and pesticide deposition efficiency. Research-Circular -Ohio-Agricultural-Research-and-Development-Center, 295: 23-27.
Matthews, GA; Hislop, EC 1993. Application Technology for crop protection. Cab Intern.: 359
Mugele, R.A.; Evans, H.D. (1951) Droplet size distribution in sprays. Industrial and Engng. Chemistry. 43(6): 1317-1324.
Nordbo, E 1992. Effects of nozzle size, travel speed and air assistance on deposition on artificial vertical and horizontal targets in laboratory experiments. Crop Protection. ll (3): 27'2.-278.
Travis, JW 1987. Effect of travel speed, application volume and nozzle· arrangement on deposition and distribution of pesticides in apple trees. Plant disease, 71(7): 606-617.
Walklate, PJ; Weiner, KL; Parkin, CS 1996. Analysis ofand experimental measurement made on moving air assisted sprayer with two dimensional air jets penetrating a uniform artificial crop canopy. J. Agric.
Engg. Res. 63: 365-378.
Warman, TM; Hunter, LD1981. Deposits of the mildew fungicide binapacryl on the leaves of apple trees of differing sizes after mist blower spraying. Pesticide Science. 12(6): 685-693.
