Dit rapport is gratis te downloaden op https://doi.org/10.18174/563415 Results of spray drift experiments are presented of the Munckhof MAS cross-flow fan orchard sprayer in comparison with a reference spray technique for fruit crop spraying in The Netherlands. The Munckhof MAS sprayer was equipped with controllable air valves and drift reducing nozzles (Lechler ID 90-01 C at 5 bar spray pressure, 90 % drift reduction), the PTO of the tractor, controlling the fan speed, was limited to 300 rpm. The Munckhof MAS orchard sprayer used a specific protocol for the outer three tree rows, limiting the amount of air support out of the orchard and spraying the outer tree row from one side. During the spray drift experiments, performed in 2020 and 2021, the downwind outer 24 m of an apple orchard was sprayed at the full leaf stage (BBCH 75-91) using the fluorescent tracer Acid Yellow 250. Spray drift deposition was collected downwind on a mowed grass area up to 25 m distance from the last tree row. For the Munckhof MAS orchard sprayer spray drift reduction at 4.5-5.5 m distance from the last tree row was 98.9% in comparison with the reference spray application.
Dit onderzoek is in samenwerking met Kruse Ootmarsum BV te Ootmarsum uitgevoerd door de Stichting Wageningen Research (WR), business unit Agrosysteemkunde (projectnummer 3710470100).
With more precise application methods applying PPP only to the areas where it is needed, the plant, the aim to reduce PPP input can be achieved. Canopy Density Spraying (CDS) was therefore used under practical conditions in onions. Spray deposition measurements of a CDS-sprayer and a standard application technique were done in three different crop growth stages of an onion crop. The CDS-sprayer was based on a Hardi Twin Force air sleeve boom sprayer with a working width of 5.4 m (three beds of 1.80 m onions) at 30 cm nozzle height. Greenseeker sensors measuring vegetation index (NDVI) were used to adjust spray volume by switching individually three nozzles mounted in Lechler Varioselect nozzle bodies. Angling of the nozzles towards the crop rows on the edges of the bed and air assistance improved spray deposition compared to a horizontal spray boom and nozzle orientation. In three growth stages spray deposition on the onion leaves was for the CDS spray technique 1.5 to 2.8 times higher compared to that of the standard air-assisted boom sprayer. Loss to soil surface on top of the bed and on the paths in between the beds was for the CDS sprayer lower than for the standard sprayer.
Dit rapport is gratis te downloaden op https://doi.org/10.18174/563416 Results of spray drift experiments are presented of the KWH Mistral cross-flow fan orchard sprayer in comparison with a reference spray technique for fruit crop spraying in The Netherlands. The KWH Mistral sprayer was equipped with controllable air settings and drift reducing nozzles (Lechler ID 90-01 C at 5 bar spray pressure, 90 % drift reduction), the PTO of the tractor, controlling the fan speed, was limited to 300 rpm and the sprayer gear box was set to the low air setting. The KWH Mistral orchard sprayer used a specific protocol for the outer five tree rows, using no air support out of the orchard and spraying the outer tree row from one side. During the spray drift experiments, performed in 2020 and 2021, the downwind outer 24 m of an apple orchard was sprayed at the full leaf stage (BBCH 75-91) using the fluorescent tracer Acid Yellow 250. Spray drift deposition was collected downwind on a mowed grass area up to 25 m distance from the last tree row. For the KWH Mistral orchard sprayer spray drift reduction at 4.5-5.5 m distance from the last tree row was 98.0% in comparison with the reference spray application.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.