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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<strong>Aster</strong> Leafhopper <strong>Management</strong><br />
AYI Thresholds<br />
‣ Estimated AYI values exceed established crop resistance levels:<br />
Carrots (resistant = 100, <strong>in</strong>termediate = 75, susceptible = 50)<br />
Celery = 35<br />
Lettuce = 25<br />
Need to protect carrot crop from ALH for 8-10 weeks<br />
At-plant ($12-18/A)<br />
Seed / In-furrow<br />
Foliar ($12-14/A)<br />
Pyrethroids<br />
Plant<strong>in</strong>g<br />
<strong>Aster</strong> leafhopper<br />
Carrot Crop<br />
Harvest<br />
15-Mar 14-Apr 14-May 13-Jun 13-Jul 12-Aug 11-Sep 11-Oct
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