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> yellows phytoplasma (AYp),<br />
Ca. phytoplasma asteris<br />
Small (0.4 μm diameter) , wall-less<br />
prokaryotic organism of <strong>the</strong><br />
provisional genus C<strong>and</strong>idatus<br />
Infects > 350 species <strong>in</strong> 38 plant<br />
families<br />
Phloem limited<br />
Has not been cultured<br />
Phytoplasma bodies <strong>in</strong> sieve elements<br />
of po<strong>in</strong>settia. I.M. Lee<br />
Obligately associated with host (<strong>in</strong>sect <strong>and</strong><br />
plant) <strong>and</strong> not mechanically transmissible<br />
Small genome (~ 700 kb) possibly as a result<br />
of reductive evolution<br />
Division: Firmicutes<br />
Class: Mollicutes<br />
Order: Acholeplamatales<br />
Family: Acholeplasmataceae<br />
Genus: C<strong>and</strong>idatus<br />
'phytoplasma asteris'
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