Nozzle Classification for Drift Reduction in Orchard Spraying: Identification of Drift Reduction Class Threshold Nozzles

In fruit growing high values of spray drift are found compared to arable field applications. In arable spraying drift reducing nozzles are certified for use as drift reducing measures. The nozzles which may potentially reduce drift in fruit growing are not jet classified as drift reducing nozzles, although they are available on the market. The development of a nozzle classification system to identify the drift reduction potential of spray nozzles used in fruit crop spraying would open this market. The results of the initial setup of a nozzle classification system for spray drift reduction in orchard spraying based on drop size measurements is described. An evaluation was made of measured drop size characteristics of a series of nozzles in reference to performed field measurements of two characteristic nozzles; Albuz lilac and Lechler ID9001. Based on these anchor points the ranking of the volume fraction of drops smaller than 100 ¿m (V100) of the nozzle to be classified could be scaled to yield a potential drift reduction, assuming a linear relationship between V100 and spray drift deposition. Within this system, the determination of threshold nozzles for the drift reduction classes 50%, 75%, 90% and 95% drift reduction are described. Identified threshold nozzles for these classes are TeeJet DG8002, Albuz AVI 80015, Lechler ID9001 and Albuz TVI80025 all at 7 bar spray pressure, except for the Lechler ID 9001 which is used at 5 bar pressure. These nozzles will be used in field drift measurements to validate the mode

Druppelgroottemetingen Teejet, Hardi en Lechler spuitdoppen ter verkrijging van de status driftarm volgens het Lozingenbesluit

In dit rapport worden de resultaten van druppelgroottemetingen aan een serie spuitdoppen gepresenteerd. Aangegeven wordt of op grond van deze metingen de doppen, bij bepaalde drukken, volgens het Lozingenbesluit aangemerkt kunnen worden met de status driftar

Identification and quantification of point sources of surface water contamination in fruit culture in the Netherlands

Measurements of pesticide concentrations in surface water by the water boards show that they have decreased less than was expected from model calculations. Possibly, the implementation of spray drift reducing techniques is overestimated in the model calculation. The impact of point sources is probably underestimated. A project was initiated for the quantification and qualification of possible point sources in Dutch fruit culture. From a survey it was concluded that the majority of fruit growers do not posses the mandatory equipment regarding filling and cleaning of sprayers. This creates a potential environmental risk for surface water contamination. Further research is focused on: internal and external cleaning of sprayers, environmental impact of the washings, discharge of transport water from fruit sorting installations, and bioremediation systems for processing contaminated water

Development of a Crop Adapted Spray Application (CASA) sprayer for orchards

In the EU-FP6 ISAFRUIT project a Crop Adapted Spray Application system (CASA) for precision crop protection was developed (Doruchowski et al., 2009). The system ensures efficient and safe spray application in orchards according to actual needs and with respect to the environment. The developed CASA system consist of three sub-systems: Crop Health Sensor (CHS) - identifying the health status of fruit crops to apply chemicals only when necessary; Crop Identification System (CIS) - identifying the tree canopy size and density to apply spray precisely at relevant doses; Environmentally Dependent Application Systems (EDAS) - identifying environmental circumstances and navigating the sprayer to adjust application parameters accordingly so that spray drift is minimised and direct water contamination is avoided

Ontwikkelingen schurftherkenning fruit

In het EU-FP6 ISAFruit-project wordt een Crop Adapted Spray Application-systeem voor precisiegewasbescherming in de fruitteelt ontwikkeld. Het systeem garandeert een veilige toediening van gewasbeschermingsmiddelen in boomgaarden afgestemd op de grootte van de boom en de geldende weersomstandigheden. Het systeem wordt beschreve

Weinig drift bij Släpduk

Om drift bij het spuiten te verminderen kan men o.a. de spuitboom verlagen. Bij het Zweedse Släpdukspuitsysteem zitten de doppen op 20 cm boven het gewas. Onderzoek naar driftmetingen in aardappelen bij dit systeem gaven gunstige resultaten te zie

Evaluatie van balanceerinrichtingen voor een stabiele spuitboom op een veldspuit : een quick-scan

Deze rapportage beschrijft een inventarisatie van op de markt beschikbare regelsystemen voor de balansverbetering van spuitbomen op veldspuiten