En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

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

Thursday - November 14, 2013

From: Austin, TX
Region: Southwest
Topic: Pests
Title: Identity of small objects that look like tiny pecans
Answered by: Nan Hampton

QUESTION:

Dear Mr. Smarty Plants, I am doing my science fair project on acorns. Last year I measured how many acorns and other nature-y stuff fell into a baby pool from a live oak tree in my backyard every day of October. Last year was a mast year so a lot fell. One day I got 44 acorns! This year I did the same measurements. It was not a mast year so I only got 3 acorns all month. But at the the end of the month some small things fell from the tree. They look like dried up tiny tiny pecans about 3 mm long. Do you know what they are? My project is due December 4, so if you could email me back before then it would be great. Thank you, Isy PS I live near MoPac and 2222 in case that helps. PPS I saved some so if you need to see them I can send a picture.

ANSWER:

From your description I can think of a couple of possibilities.

1) The most likely possibility is that they are plant galls.  Galls are abnormal growths on plants in reaction to insects, mites, fungus or bacteria.  The most common ones are caused by the plants reaction to the deposit of an insect or mite laying an egg on the plant's leaves or stems.  The larva from the egg is encased by the growing tissue in which it feeds.  The insect usually overwinters and emerges as an adult in the spring. Galls can occur on many trees and other plants, but oaks and hackberries have a large number and variety of galls.  Here are links to several descriptions, with photos, of galls:

Gall-Making Insects and Mites from Texas A&M AgriLife Extension

Oak Gall Insects from Texas A&M Forest Service

The Mealy Oak Gall on Ornamental Live Oak in Texas from Nueces County AgriLife Extension.

Galls on Trees from Missouri Botanical Garden.

Hackberry nipplegall maker. Hackberry blister gall psyllid.

You can determine if the objects you found are galls by cutting them open.   You will find either the larva inside or a hollow where it grew.   If you find the hollow without the insect, you should be able to find the small hole on the surface of the gall where the insect emerged.

2)  The other possibility is that they are fruits from a plant you haven't noticed before.   If you cut the fruit open, you should be able to find a seed inside.

 

More Pests Questions

Application of sprays to non-native Crape Myrtle from Prosper TX
June 29, 2012 - Can applying a systemic insecticide/fungicide combo prevent or limit Crape Myrtle blooms? I have 5 large lavender Crapes that are not blooming or budding yet and this is the first time I have used a ...
view the full question and answer

Controlling scale insects on hollies
July 10, 2005 - I have a number of holly shrubs at the side of my house. Recently I noticed that they have tiny white spots on them. I looked at several native Texas gardening books, but can't find what I need to t...
view the full question and answer

Spots on calycanthus petals from Buckley WA
June 20, 2013 - Petals on calycanthus develop black spots the turn into holes. Problem appears shortly after buds open. Occurs every year. Foliage is healthy. Plant growing well and doubles or triples size every ...
view the full question and answer

Disappearance of leaves on desert willow in Tucson AZ
August 08, 2009 - We have a Lois Adams Desert Willow (Tucson, Az). The leaves will pump out and then a day or so later, all of the leaves are gone. The only bugs we've seen on it are very, very small ants. Could this ...
view the full question and answer

Replacements for yuccas from Georgetown TX
August 07, 2013 - I have lost some softleaf and variegated yucca to a beetle grub destroying the root system - like the Agave snout beetle does. I have put an insecticidal drench on my remaining plants, but suspect wi...
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