Latest Diagnosis
Damage on Sunflower blooms
Submitted by Heidi Doering on 8/19/2014
I'm wondering if this is caused by insects (Goldenrod Soldier Beetle and Aphids found in area) or if it's a disease issue. Or could it be disease as a secondary issue after insect feeding?

Damage to base of flower
Damage on sepal
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Reply by Brian D. Hudelson on 8/19/2014
Heidi: I can't see enough detail to say for certain what this is. Sorry. I'd need to see a sample. Brian (:))

Reply by P.J. (Patrick) Liesch on 8/21/2014
Certain sucking insects such as aphids and plant bugs can cause irregular discoloration. However, if aphids were the culprit, I'd expect to see them around or see evidence of their presence (old exoskeletons). The solider beetles tend to show up at just about any yellow colored flower this time of year and are after pollen. I wouldn't expect them to cause this type of damage.

Disease could be another possibility. If you do send a sample in to Brian, I'd be curious to see if he finds anything.

---PJ


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