The abiotic and biotic impacts of climate change on potato agriculture

25 Pages·2016·4.49 MB·English

The abiotic and biotic impacts of climate change
on potato agriculture
Stewart Jennings,
Ann-Kristin Koehler,
Steve Sait,
Andy Challinor
Summary
Biotic stresses – why are they important?
●
Why are potatoes important?
●
Model set-up.
●
Impacts of climate change on potato
●
agriculture – UK and Colombia case
studies.
Oerke, 2006

Oerke, 2006
Pest damage inclusion in crop models

Rivington and Koo, 2011
Pests moving spatially and temporally with
climate change
Bebber et al., 2013
Late blight (Phytophthora infestans)
Phytophthora infestans – better known as late blight or potato blight – is the
●
fungus-like oomycete responsible for the Irish potato famine of the mid-19th
century.
Global potato yield losses from diseases, pests and weeds estimated to be around
●
40% of attainable production (Oerke, 2006).
Diseases alone accounted for 21% of this loss, with late blight generally considered
●
the most important global disease.
Potential yield losses from late blight in some cases reported to be as high as 30%
●
(Dowley et al., 2008)
Damages leaves, stems and tubers.
●
The neglected potato?
Neglect Index = Global Crop Production / WoK Hits
x x
e e
d d
n n
I I

t t
c c
e e
gl gl
e e
N N
WoK search (Brown et al., 2011): “Potato and Global search - "potato and global
● ●
(radiation interception or radiation use efficiency and climate change and crop model
or photosynthesis or extinction coefficient or
and (yield or production or stress)"

phyllochron or leaf appearance or leaf size or
leaf area index or harvest index)”.
The Polygon of Potato Pertinency
The Polygon of Potato Pertinency

Neglected
The Polygon of Potato Pertinency

Neglected Pest
vulnerability