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Scout for Lygus Bug in Confection Sunflowers (08/01/19)

Lygus bug is primarily an insect pest concern in confection sunflowers only.

Identification:  Lygus bug is primarily an insect pest coent.4ncern in confection sunflowers only. Adults are small, cryptically colored insects with a distinctive yellow triangle or “V” on the wings, and are about ¼ inch in length. They vary in color from pale green to dark brown. Lygus bugs insert their mouthparts into developing sunflower seeds and inject a toxic saliva into the seed causing a brown to black spot called “kernel brown spot.”

Scouting:  Count the number of Lygus bug adults on 5 plants at 5 sites for a total of 25 plants. Scout for Lygus bugs during flowering. Sunflowers are susceptible to feeding injury from flowering through seed hardening.ent.3

 

 

 

 

Janet J. Knodel

Extension Entomologist

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