En EspaŅol
Share

Ask Mr. Smarty Plants

Mr. Smarty Plants - Insect pests in Gaillardia aristata in Tennessee

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 
See a list of all Smarty Plants questions
Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.

Need help with plant identification, visit the plant identification page.
 
rate this answer
Not Yet Rated

Friday - August 22, 2008

From: Old Hickory, TN
Region: Southeast
Topic: Diseases and Disorders
Title: Insect pests in Gaillardia aristata in Tennessee
Answered by: Barbara Medford

QUESTION:

Dear Mr. Smarty Plants, I have a couple of 'Oranges and Lemons' blanketflower plants in a butterfly and hummingbird native flower garden that is the foundation planting of my house. They bloom prolifically for me all summer and well into the fall, and seem to be quite popular with the butterflies. However, this year and last year they have been severly damaged by what I am pretty sure are leaf miners. The leaves now have significantly more white/pale yellow than green, and the white areas are very papery, thin, and almost see-through. Also, many of the badly damaged leaves burn, and completely shrivel up. By the end of the summer they start to look very raggedy, although the continued blooms are still very nice and drawing butterflies. What, if anything, can I do to prevent this damage without harming the butterflies? I saw a systemic granule that is supposed to protect against leaf miners - but it is harmful to caterpillars. Do any butterflies or moths use the blanketflower as a larval food? Would the systemic make the nectar poisonous as well? Any suggestions would be greatly appreciated!

ANSWER:

Gaillardia aristata (common gaillardia) is not distributed naturally in Tennessee, but is easily spread by cultivation. The "Oranges and Lemons" is no doubt a trade name, possibly for some color selection, of the blanketflower.

From your description, it appears you are correct that a leafminer is causing the damage to the leaves on your plants. More specifically, we believe the culprit is the Blotch Leafminer, named for the appearance of the tunnels made by the larvae in the leaves. Some of the main hosts of the Blotch Leafminer are members of the Asteraceae family, including Gaillardia. Heavy infestations may kill some leaves, but most damage is simply aesthetic.

There is a biological control of these pests, in the form of a number of parasitic wasps that attack leafminers. We urge you to avoid chemical controls, as they would not only take out the parasitic wasps that help control the leafminers, but also be damaging to other beneficial insects, and certainly to the butterflies and bees you are hoping to attract. Good cultural practices in your garden, good drainage and removing damaged leaves and destroying them, will also help to discourage the leafminers.

 

More Diseases and Disorders Questions

Black leaves and dying kinnikinnick (Arctostaphylos uva-ursi)
December 16, 2007 - My kinnikinnick has developed dark leaf spots and, in some cases the entire leaf has turned black or entire plants have turned black and died off. I'm worried about leaf spot, root rot and leaf gall...
view the full question and answer

Failing to thrive of non-native rose bushes in Austin
September 24, 2012 - I live in NW Austin and I have lost one knockout rose bush this summer and it looks like another one is failing. The leaves on a cane turn yellow then brown. I do not see whiteflies or black spots o...
view the full question and answer

Shy blooming non-native Crape Myrtle, in Littlestown Pennsylvania
July 25, 2011 - My Crape myrtle has been planted about three years, and reached a height of about 4'. It blooms late July and for the past two years, has only had one or two blooms on it. I have a lot of buds whic...
view the full question and answer

Yellowing leaves on Mexican Plum in Salado, TX.
July 24, 2013 - I do live in Cental Texas (Salado) and I have the same problem with my Mexican Plum as the lady in Bellaire, TX. Mine was planted in June in a raised bed and receives sun all day long. Within the la...
view the full question and answer

Need to find a place to buy Western Soapberry in Paris, TX.
May 05, 2012 - Where is the closest place to purchase a Western Soapberry tree?
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center