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Patch Spraying in the UK Nicola Perry Nicola.Perry@adas.co.uk
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Pesticide application Patch spraying of herbicides Variable fungicide and growth regulator Matching application to target dose application
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Spatially variable pesticide application All systems need: – in-field location – method of detection visual mapping for weed patches spectral reflectance for crop canopy – treatment map generated software packages are being developed – system for application injection metering control volume rate systems with a wide operating range
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SAPPIO LINK Project Exploiting Weed Patch Dynamics Research Partners IACR-Rothamsted, Silsoe Res. Inst. Industrial Partners AGCO, Micron Sprayers, HGCA
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Aim of project To develop a spatially selective weed control system for arable crops, that delivers a reduction in herbicide use and consequent financial benefit to users and to the environment
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Research areas Mapping based on visual detection Patch stability Feasibility of automated detection Validate system
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Weed patch detection
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Timing of visual assessments
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Crop canopy monitoring Or from: aircraft or satellites
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Treatment map generation
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Defined treatment map
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Herbicide savings Cost of mapping approx. €3/ha
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Project Demonstration Live demonstration of weed mapping and patch spraying Attended by farmers/contractors, advisors, industry, environment / regulatory authorities Reported in UK farming press
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Current Status of Patch Spraying in the UK Variable rate Micron PatchSpray ~ 10 operating in UK Injection metering ~ 50 operating in UK ~ only a few interfaced with a map based control system Switching on/off?
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Problems with implementing patch spraying Management not as straightforward Involves greater level of decision making Collecting and handling data Make technology and interface easier to manage (Economics)
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