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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Seasonal trends: AY <strong>Index</strong><br />
Calculate historical average AY risk that accounted<br />
for annual variation <strong>and</strong> seasonal variation<br />
Calculate AYI:<br />
Average daily ALH<br />
abundance<br />
Average weekly ALH<br />
<strong>in</strong>fectivity for low, average<br />
<strong>and</strong> high years<br />
Add smooth<strong>in</strong>g function<br />
(Regression spl<strong>in</strong>e or<br />
mov<strong>in</strong>g average)<br />
High<br />
Ave.<br />
Low<br />
AYI treatment thresholds<br />
used to estimate crop risk
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