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Títol:	Spray distribution evaluation of different settings of a hand-held-trolley sprayer used in greenhouse tomato crops
Autor/a:	Llop Casamada, Jordi; Gil Moya, Emilio; Gallart González-Palacio, Montserrat; Contador, Felipe; Ercilla-Montserrat, Mireia
Altres autors:	Universitat Politècnica de Catalunya. Departament d'Enginyeria Agroalimentària i Biotecnologia; Universitat Politècnica de Catalunya. ASQUAS - Agricultura Sostenible i Qualitat dels Aliments
Abstract:	Hand-held-trolley sprayers have recently been promoted to improve spray application techniques in greenhouses in south-eastern Spain. However, certain aspects remain to be improved. A modified hand-held-trolley sprayer was evaluated under two different canopy conditions (high and low canopy density) and with several sprayer settings (nozzle type, air assistance and spray volume). In this study, the deposition, coverage and uniformity of distribution of the spray on the canopy have been assessed. RESULTS The deposition on leaves was significantly higher when flat-fan nozzles and air assistance were used at both high and low spray volumes. No differences were detected between the reference system at a high spray volume and the modified trolley at a low spray volume. Flat-fan nozzles with air assistance increased penetrability into the canopy. CONCLUSIONS Air assistance and flat-fan nozzles allow volume rates to be reduced while maintaining or improving spray quality distribution. The working parameters of hand-held sprayers must be considered to reduce environmental risk and increase the efficacy of the spraying process. © 2015 Society of Chemical Industry
Matèries:	-Àrees temàtiques de la UPC::Enginyeria agroalimentària::Agricultura -Spray drying -greenhouse -hand-held trolley -air assistance -deposition -coverage -nozzle type -Fitotècnia -- Innovacions tecnològiques
Drets:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Tipus de document:	Article - Versió actualitzada Article
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