Revising the Aster Yellows Index and Management in Wisconsin
Revising the Aster Yellows Index and Management in Wisconsin
Revising the Aster Yellows Index and Management in Wisconsin
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Detection of seasonal trends <strong>in</strong> AY<br />
‘Risk W<strong>in</strong>dows’<br />
Modified from Nault et. al. (2009). Environ. Entomology.<br />
Our methods:<br />
Sweep data were averaged for each year, field, <strong>and</strong> date<br />
comb<strong>in</strong>ation<br />
Data were st<strong>and</strong>ardized us<strong>in</strong>g ei<strong>the</strong>r r<strong>and</strong>om effects models or<br />
regression spl<strong>in</strong>es<br />
Cubic polynomials were fit to <strong>the</strong> result<strong>in</strong>g “conditional” or<br />
“deseasonalized” data (l<strong>in</strong>ear model)<br />
Does seasonality describe any more of this variability
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