How to combat Fall season webworms…..

Author: Kent Keith | Find Us on Google+

Web Worms

Been noticing all the trees with the webs lately? In the Dallas / Worth area, they thrive mostly in the pecan trees. They are called webworms, latin name Hyphantria cunea.

These inch-long green or yellow caterpillars, bristling with silky hairs, are actually moth larvae. In summer and early autumn they weave expansive webs that bind together the ends of branches. They eat every leaf within reach, continually building larger webs until late autumn, when they pupate. Resembling dirty rags and filled with black droppings and wriggling worms, the webs ruin the aesthetics of any garden.

One way to combat these is to get a long pole and rip the web pocket open in the morning. With the web open, birds throughout the day will feed on the worms.

To plan an effective schedule of prevention and control, it helps to understand the life cycle of Hyphantria cunea. In early spring, moths come fluttering up from cocoons carefully hidden in the bark of tree trunks and in ground debris. The adult moths are about 2 inches from wingtip to wingtip and are white spotted with brown. They lay eggs in clusters on the leaves of suitable host plants.

The eggs hatch within a week. Out come tiny caterpillars, the first generation of the growing season, spinning webs and eating leaves. This first infestation is so mild that sometimes the webs go unnoticed.

The first-generation caterpillars have eaten their fill by early summer. They form cocoons and pupate, usually in the bark, of a tree or underneath leaves or other debris on the ground. By midsummer they re-emerge as moths. A second generation follows — this time larger and more destructive.

Because the webworms — in one form or another — are present year-around, it’s possible to devise a year-round strategy for dealing with this pest. Here are some tactics that have worked for me:

* In winter or early spring, remove fallen leaves, ground debris and mulch, which may harbor overwintering webworm pupae. Replace the debris with fresh, pest-free mulch.

* Inspect susceptible plants for the greenish egg masses, which are typically laid on the undersides of leaves and are protected by a woolly or scaly covering. Eggs are deposited from late spring through fall. Remove any affected leaves and destroy them. This strategy requires time and sharp eyes and is obviously impractical for tall trees.

* Bacillus thuringiensis (Bt) is a microbial pesticide that can be applied as a dust or spray. It kills many types of caterpillars but has no effect on warm-blooded animals or bees.

With fall webworms, Bt is effective only if its application is properly timed. Once the caterpillars have enshrouded themselves in webs, they are more difficult to kill. Check on susceptible plants frequently, beginning in late spring, and apply Bt at the first sign of hatching webworms. Bt loses effectiveness after about two days, so it must be reapplied as long as more larvae are hatching.

Always use Bt with care, because it also can kill the larvae of non-pest moths and butterflies.

* When you see webs, clip the infested branches and burn them, or drown the larvae in a bucket of soapy water. A pole pruner with a lopper blade will help you reach webs within 16 feet or so of the ground.

Home inspection pests

Home inspection pests

17 thoughts on “How to combat Fall season webworms…..

  1. Fantastic article! Your style is so refreshing compared to most other writers. Thanks for writing when you get the chance to, I will be sure to subscribe!

  2. how are you I was fortunate to search your theme in google
    your subject is outstanding
    I learn a lot in your topic really thank your very much
    btw the theme of you site is really fine
    where can find it

  3. It’s really a nice and helpful piece of information. I’m glad that you shared this helpful info with us. Please keep us informed like this. Thanks for sharing.

  4. I fool interpret a only one of the articles on your website in the present circumstances, and I extremely like your line of blogging. I added it to my favorites entanglement page roster and disposition be checking stand behind soon. Cheer report register in view my site as approvingly and leave to me be acquainted with what you think. Thanks.

  5. Pingback: House Renovation

  6. This is actually interesting, You’re a very skilled blogger. Ive joined your rss and look toward seeking much more of your great post. Also, I’ve shared your internet site in my social networks!

  7. Pingback: home inspectors

  8. When in the larger stage I found the garden hose works good for knocking them from the tree out of reach otherwise!

  9. I am so glad this internet thing works and your article really helped me. Might take you up on that home advice you

  10. I truly love your website.. Very nice colors & theme. Did you build this
    site yourself? Please reply back as I’m hoping to create my own site and would love to know
    where you got this from or exactly what the theme is named.
    Thank you!

  11. Awesome blog! Is your theme custom made or did you download it
    from somewhere? A theme like yours with a few simple tweeks would really make
    my blog shine. Please let me know where you got your design. Thank you

  12. Marvelous, what a webpage it is! This web site provides valuable information to us,
    keep it up.

  13. whoah this blog is fantastic i like reading your articles.
    Keep up the good work! You recognize, a lot of individuals are hunting round for this info, you can help them greatly.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.