Buggy Joe!! What Is That? - Calico Scale

posted by Ron Wilson -

Calico scale (Eulecanium cerasorum) eggs located beneath helmet-shaped females are hatching in southwest Ohio and the 1st instar nymphs (crawlers) are on the move.  All nymphal stages are mobile, so all nymphs can be called "crawlers."  The tiny, tannish-brown, oblong-shaped 1st instar crawlers are around 1/16" in length.  They migrate to the undersides of leaves and position themselves along leaf veins where they insert their piercing-sucking mouthparts into phloem vessels to extract amino acids dissolved in the sugary plant sap.

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Ron Wilson

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