Thursday, June 20, 2013

Tarnished Plant Bug

According to BugGuide, the Tarnished Plant Bug (Lygus lineolaris) is the most common plant bug in the US. Once you know what features to look for, it's pretty easy to identify this species:

  • The pale yellow "Y" on the scutellum is a giveaway, though it can sometimes look like a "V". 
  • Frons with black submedian stripes (vittae). Only 4 species in the genus have such stripes.
  • Long, dense hairs (vs. L. rufidorsus)
  • Hemelytra without patch hairs (vs. L. plagiatus)
  • Red or yellow lateral margins of the mesoscutum (vs. L. unctuosus)
  • A "kink" in the back, similar to the Broken-backed Bug (Taylorilygus apicalis).
The elytra vary in color from light to dark brown. The cuneus is usually yellowish or clear, with a small black spot at the tip. However, the color and markings vary between sexes and between overwintering and summer adults. In my region, the South, the Tarnished Plant Bug is active year-round. It can be a real pest, as over half of the plants cultivated in the US are hosts. Using their needle-like mouthparts and watery saliva, these bugs extract juices from the plant, breaking down tissue and ultimately interfering with the plant's development. Symptoms include wilting, failed and/or prematurely dropped buds, yellowing, and leaf ragging or crinkling, You can read more about this beautiful yet damaging plant bug on the sites below.

I found the following specimens on Orange Day Lilies (Hemerocallis fulva).




References:

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