Native Plants
![](../_images/smarty_plants.gif)
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.
Did you know you can access the Native Plant Information Network with your web-enabled smartphone?
Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.
![](../_images/mr_smarty_plants_logo_web_200w.jpg)
rate this answer
![](../_images/star_43.gif)
Sunday - October 03, 2010
From: Austin, TX
Region: Southwest
Topic: Pests
Title: What are the webs floating in the air? Are they harmful to plants?
Answered by: Nan Hampton
QUESTION:
Austin, TX has experienced fall weather for the past week..low humidity, nice temps, sunny skies. But long webs are connecting from trees to our plants to the porch. Not on the trunk of the tree like tree lice. Just tons of long webs floating in the air and anchoring on everything:plant and not. What is making them? Harmful to trees and plants? It's not the time of year for web worms or caterpillars. Thanks kindly.ANSWER:
These are mostly small spiders, each of which has released her/his own string of silk that serves as sort of a balloon or sail to help them fly away on the breeze. This is their means of dispersing to a new habitat. Many, but not all, of them are spider hatchlings that are dispersing from their hatching sites to find new territory away from their numerous siblings. Larger spiders can balloon, too, but it takes more silk and more breeze to get and keep them airborne. Here is a short video from bio-physicist Bob Suter from Vassar College showing spiders launching themselves and explaining how they do this. Here are links with more information from Purdue University Extension, LiveScience and the Conservation Commission of Missouri. The webs and spiders aren't harmful to plants. In fact, if they land on your plants, decide they like their new spot and don't look for the opportunity to relaunch on their gossamer balloons, they will no doubt consume many insects that could be harmful to your plants.
More Pests Questions
ID of insects attacking a Mexican Plum in Austin, TX
May 11, 2015 - I live in south austin and have a young 6' tall mexican plum. For the third year in a row it is getting eaten by small green 'leaf-rolling' worms. The destruction the past 2 years was so bad there ...
view the full question and answer
Holes in leaves of wax myrtle from Austin
April 30, 2011 - I just purchased 4 of the 5 gallon Wax Myrtles at the last spring plant sale and after planting them, they are getting eaten by bugs leaving holes in the leaves. I can't find any of the bugs doing th...
view the full question and answer
Berry-looking parasites on live oak leaves
September 20, 2013 - Dripping Springs TX Live oaks. What are these berry looking parasites on my tree's leaves. As many as 4 1/4 in berries per leaf. I have 3 acres with dozens of liveoaks all having them on the leav...
view the full question and answer
Plants that animals won't eat from Ione WA
April 19, 2013 - In Ione Washington and need to know what types of plants and flowers I can plant that animals in that area wont eat?
view the full question and answer
Cultivar of Cercis Canadensis from Haskell OK
May 16, 2012 - We have a Hearts of Gold Redbud that first had dark edges to many of its leaves (about 2 weeks after planting). It now has multiple leaves w/ medium-dark brown spots on them. Are we looking at some ...
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |