tent worms on birch

Asked August 5, 2016, 12:42 PM EDT

hi all, I just looked out my window and saw a tent at the tip of one of my birch tree branches. Attaching a photo, thou it's not very clear unfortunately; the affected (tent) area was about 10-12 inches long. I burned the branch. thank you for your help

Montgomery County Maryland birch trees

5 Responses

Burning the tent caterpillars should take care of the problem. No further treatment should be necessary. http://extension.umd.edu/hgic/eastern-tent-caterpillar-trees vw

I guess I'm concerned that if some made their way out onto my tree, more might be coming. Also, do you know what kind of insects/bugs these are?

Thanks again

These are fall webworms and you needn't be concerned. They are not a big deal, i.e. do not do much damage, while providing a rich protein source for birds.
Here is a page about them: http://www.extension.umd.edu/hgic/fall-webworm-trees

If you find them again next year, consider leaving them be or cutting off the affected branch tips for disposal. It should be noted that we no longer recommend burning.

cm

super, thnx CM for additional info. and yes, I should have just sprayed them with something (insecticidal oil or bug spray?) but I freaked out because it was on my prized jacquermontii birch

thnx again for your time, so glad this service exists!

No, you needn't spray anything.
As mentioned above, If you find them again next year, consider leaving them be or simply cutting off the affected branch tips for disposal. It should be noted that we no longer recommend burning.

cm