Plant Clinic: What the heck is doing this to my roses?

written by Sarah F.

A client brought in some rose leaves with a stippled look. We deduced that the problem on the roses was thrips. There is some debate about whether the word thrip is used both as singular and plural – what a strange language we use. Florida Extension web page nailed it by saying
“Thrips — singular or plural — are a nuisance”

thrips

On the underside of a leaf we found stalked minute egg cases. They were the egg cases of lacewings and lacewings dine on thrips.
Follow the links for some more interesting reading on roses , thrips and lacewings:

https://en.wikipedia.org/wiki/Thrips
https://en.wikipedia.org/wiki/Neuroptera
http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7466.html

lacewing1

Other treatments:

 

Beauveria bassianacarbaryl

  • Beauveria bassiana-Some formulations are OMRI-listed for organic use.
  • bifenthrin
  • carbaryl
  • spinosad A&D-Some formulations are OMRI-listed for organic use.
  • Beauveria bassiana-Some formulations are OMRI-listed for organic use.
  • bifenthrin
  • carbaryl
  • spinosad A&D-Some formulations are OMRI-listed for organic use.
  • Beauveria bassiana-Some formulations are OMRI-listed for organic use.
  • bifenthrin
  • carbaryl
  • spinosad A&D-Some formulations are OMRI-listed for organic use.
  • Beauveria bassiana-Some formulations are OMRI-listed for organic use.
  • bifenthrin
  • carbaryl
  • spinosad A&D-Some formulations are OMRI-listed for organic use.