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Determining the Risk Window for Aster Yellows in Carrot: New ...

Determining the Risk Window for Aster Yellows in Carrot: New ...

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<strong>Aster</strong> yellows: <strong>in</strong><br />

carrot<br />

Disease <strong>in</strong>cidence:<br />

1%-15% <strong>in</strong> <strong>in</strong>tensively<br />

managed carrot fields<br />

Likely 80-100% if not<br />

managed<br />

<strong>Carrot</strong><br />

<strong>Carrot</strong><br />

Lettuce<br />

Variable symptoms: Above ground – leaf<br />

yellow<strong>in</strong>g and redden<strong>in</strong>g, twist<strong>in</strong>g, witches'<br />

broom<strong>in</strong>g; Below ground – stunted and<br />

mal<strong>for</strong>med roots, adventitious root growth<br />

Celery<br />

O<strong>the</strong>r crops affected: Lettuce, celery, cilantro,<br />

canola, parsnip, potato

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