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dc.contributor.authorRoten, Roryen
dc.contributor.authorPraat, John-Paulen
dc.date.accessioned2020-06-07T23:51:20Z
dc.date.issued2015en
dc.identifier.issn1175-9003en
dc.identifier.urihttps://hdl.handle.net/10182/12029
dc.description.abstractDwarf apple trees are becoming more common in New Zealand due to their easier maintenance and more efficient production. However, this may increase the risk of spray drift if orchardists’ do not adjust spraying practices to match shorter dwarf varieties of fruit trees as compared with larger more traditional canopies as dwarf trees have less foliage to intercept spray. A study was carried out to examine the off-target movement of the spray plume from a conventional air-blast sprayer as compared with an experimental ultrasonic sensor sprayer in a dwarf apple canopy. The experimental sensor sprayer was set up to respond to the target canopy. Three treatments were carried out including a conventional Typhoon 1500 orchard sprayer, a single row ultrasonic sensor sprayer with either sensors ON or OFF. Each sprayer was set to deliver 500 L/ha of a 0.4 g/L concentration of a fluorescent dye (PTSA, 1,3,6,8-pyrenetetrasulfonic acid tetrasodium salt). The drift was quantified by using a series of mylar cards, petri dishes and fishing nylon. Results indicated a 24% decrease of deposited drift from 1 to 100 metres with the sensors turned on and a 5% increase with the sensors off as compared to the conventional sprayer.en
dc.format.extent439-439en
dc.language.isoenen
dc.publisherNew Zealand Plant Protection Societyen
dc.relationThe original publication is available from - New Zealand Plant Protection Society - https://www.nzpps.org/nzpp_contents.php?vol=68en
dc.rights© 2015 New Zealand Plant Protection Society (Inc.).en
dc.sourceNew Zealand Plant Protection Conference 2015en
dc.subjectspray driften
dc.subjectdwarf applesen
dc.subjectultrasonic sensor sprayeren
dc.titleEvaluation of spray drift with an experimental ultrasonic sensor sprayer in a dwarf apple orcharden
dc.typeConference Contribution - Published
lu.contributor.unitLincoln Universityen
lu.contributor.unitLincoln Agritechen
dc.subject.anzsrc0703 Crop and Pasture Productionen
dc.subject.anzsrc070603 Horticultural Crop Protection (Pests, Diseases and Weeds)en
dc.subject.anzsrc07 Agricultural and Veterinary Sciencesen
dc.relation.isPartOfNew Zealand Plant Protectionen
pubs.finish-date2015-08-13en
pubs.organisational-group/LU
pubs.organisational-group/LU/Lincoln Agritech
pubs.publication-statusPublished onlineen
pubs.publisher-urlhttps://www.nzpps.org/nzpp_contents.php?vol=68en
pubs.start-date2015-08-11en
pubs.volume68en
dc.identifier.eissn1179-352Xen
lu.identifier.orcid0000-0001-7608-2098
lu.subtypeConference Abstracten


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