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Using satellite imagery to improve Hylobius prediction

Carried out by: Forest Research

Summary Description:

Hylobius can cause significant damage on seedlings, especially on restock sites. Forest Research (FR) is attempting to refine the current Hylobius Management Support System by building models to predict ‘site-to-site’ movements of Hylobius between clearfellings. This relies on an understanding of when movements will occur between ‘sources’ and ‘sinks’ in relation to felling dates.

In this context, satellite imagery will be used to track the location, scale and timing of newly felled areas so that they can be timely categorised as ‘sources’ or ‘sinks’ and linked to the seasonal patterns of Hylobius. To do this, FR is adapting the US Forest Service LandTrendr application to construct monthly estimates of areas being felled using time-series of Landsat imagery complemented with the EU-satellite Sentinel-2. This technique undertakes a web search for the best available pixels that configure satellite images at a particular location. The best pixels are then stitched together to give a Best Available Pixel (BAP) mosaic.

The desired outcomes will be a better prediction of Hylobius forest-scale movement, a minimisation of insecticide inputs and beating up and the reduction of the fallow period.  

 

Timescale: 2017-2018

SFT Funds Awarded: £10,000

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Scottish Forestry Trust is a registered charity (Scottish Charity No. SC008465).