Revision of Arable and Grassland and Fodder Crop reports

In previous Arable and Grassland and Fodder Crop reports there has been an overestimation of the area treated with some active ingredients. This situation has arisen when more than one product containing the same active ingredient was applied in a single tank mix, leading to the application area for that active ingredient being counted more than once in error.

This issue only affects a limited number of active ingredients in relation to the area treated with those active ingredients. All formulation data and active ingredient weight data are unaffected. Therefore this inaccuracy has limited impact on the dataset as a whole.

The magnitude of the overestimation was less than 2% of total spray area of pesticide active ingredients in Arable reports and between 3 to 5% in Grassland and Fodder Crop reports.
Overestimations were greatest in relation to herbicide active ingredients, with data displaying between 3 and 5% overestimation in both reports. Individual active ingredients showing a sizable overestimation of their application area include isoproturon (around 20% in Arable reports) and MCPA (10 to 15% in Grassland and Fodder Crop reports). Several other active ingredients displayed overestimations in the region of 1 to 5% of total spray area.

In order to address this issue, we have recalculated the treated crop areas for these surveys and revised the reports. These revised reports (Arable reports from 1996 to 2006 and Grassland and Fodder Crop reports from 1997 to 2005) are now available on this website.

This overestimation occurred when producing national estimates for Scottish pesticide use from the sample dataset. The data supplied for use in the Great Britain reports produced by FERA are the sample data; therefore the GB reports are unaffected.

We apologise for any inconvenience that may have been caused by this historical inaccuracy in our reports. If you require any further details of the changes made, or want to discuss any aspect of this matter further, please do not hesitate to contact us at psu@sasa.gsi.gov.uk