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
See other Horticulture cases
See other Plant Diseases cases
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.


Recent Cases
Case Submitted Team Category Responses
Damage on Sunflower blooms 8/19/2014 Horticulture Plant Diseases 2
Oak Leaf curling 8/19/2014 Horticulture No Specialization 1
Tomato Problem 8/14/2014 Horticulture Vegetables 1
Insect ID 8/14/2014 Horticulture Insect Identification 1
burning biennial thistle 8/14/2014 Weed Control 1
Drip Irrigation 8/8/2014 Horticulture Horticulture - Miscellaneous 2
Apple Problems 8/7/2014 Fruit and Orchard 1
Strange Plant Growth 8/7/2014 No Specialization 2
Unknown weeds in Elk Pasture 8/5/2014 Weed Identification 2
Leaf Death Red Maple 8/4/2014 Horticulture Woody plants 4