American Tent Caterpillar (Malacosoma americanum)

Order: Lepidoptera (le-pid-OP-ter-a) (Info) Family: Lasiocampidae Genus: Malacosoma Species: americanum (am-er-ih-KAY-num) (Info) Profile: No positives 1 neutral 9 negatives Regional... This bug has been reportedly found in the following regions: Paron, Arkansas Thomson, Georgia Ashkum, Illinois River Forest, Illinois Jeffersonville, Indiana Benton, Kentucky Ewing, Kentucky Hebron, Kentucky Frederick, Maryland Silver Spring, Maryland Brockton, Massachusetts Benton Harbor, Michigan Hudson, New Hampshire Denville, New Jersey Selden, New York Marion, North Carolina Oxford, North Carolina Glouster, Ohio Meshoppen, Pennsylvania Newburg, Pennsylvania Port Matilda, Pennsylvania Wilkes Barre, Pennsylvania Cookeville, Tennessee Desoto, Texas Fort Worth, Texas Houston, Texas Huffman, Texas Charlottesville, Virginia Fairfax, Virginia Fredericksburg, Virginia Irvington, Virginia Middleton, Wisconsin Oregon, Wisconsin Member Notes: Rating Author Comment Negative melody On Aug 2, 2006, melody from Benton, KY (Zone 7a) wrote: The caterpillars are the destructive part of the life cycle in this species. The small brown moths do not have functional mouth parts...living only to breed. They deposit their eggs in fruit or nut trees, and the caterpillars live in a communal web or tent...emerging in the day to methodically strip foliage from the host tree, returning at dark to the safety of the silken web. They are destructive enough to actually kill the tree. I take a butane torch to any I find in my trees...makes quick work of them, and I've not used any chemicals that would endanger good bugs or birds. Negative duckmother On Aug 5, 2006, duckmother from North Little Rock, AR wrote: We have two black cherry trees and both had bad bug tents this spring. They were too high in the tree to torch but when they came down the tree...lookout. We had hoped that our ducks would eat them but they did not like the caterpillars either. So, we found other means...mostly a shoe! Negative DiOhio On Jan 25, 2007, DiOhio from Corning, OH (Zone 6a) wrote: Like stated above, the larva to this moth is a serious defoliating pest. Host Plants: Many trees and shrubs, especially apple, cherry trees, flowering crabapples and other members of the rose family. Negative onewish1 On May 15, 2007, onewish1 from Denville, NJ (Zone 6a) wrote: I just learned how destructive these little buggers are... but I was fascinated how the little hole in the top of the tent was the entrance and the caterpillars must have been tending to the larva inside and you can see how each layer they pass through to get to the lower levels.... caterpillar condo! Neutral yotedog On Apr 18, 2008, yotedog from Raleigh, NC wrote: The caterpillars come out approximately mid-April in my zone 7b garden, and are quite destructive. My child loves them, and can easily find 20 or so at a time at their peak...their favorite garden plants include roses (especially buds), lettuce, fruit tree leaves/flowers and pretty much anything else that's coming up! Not fond of iris or other thick-skinned leaves. Negative raudenbush On Apr 28, 2008, raudenbush from Fredericksburg, VA wrote: I recently had a very spectacular run-in with these caterpillars. Apparently, while they are not poisonous, their little spines can irritate sensitive skin. My garden is a National Wildlife Certified Backyard Habitat and I don't use any insecticides so when the caterpillars had finished eating my crab apple tree (which I had decided to take out anyway), and ventured out into the rest of my garden, I attempted to simply pick as many as I could off everything and drown them in a bucket of water. That part worked great, but in the process I was using my bandana to wipe persperation off my face and neck with the same glove I used to pick the caterpillars, thereby transferring the spines to my tender skin. I'm currently on a second round of steriods and after two full weeks the rash is finally starting to go away. The itching was worse than poison ivy! So please, be warned. I would discourage anyone from touching these guys. I should have known to beware when even the birds don't eat them! Negative aggscott On May 1, 2008, aggscott from Wilkes Barre, PA (Zone 6a) wrote: I walk daily in the woods around my home and these guys are everywhere! They are eating all the leaves and I think this year will be the worse in a long time..WOW they are awful! Negative jnklz On May 17, 2008, jnklz from Fairfax, VA wrote: We've always had a few tents' worth of these things, but this year, they're everywhere. Eating everything! An entire army of them is bivouacked in a tree in front of the house, located within easy reach of a weeping cherry tree. One day while mowing the lawn a couple of weeks ago, I noticed the entire tree was covered with silk trails -- and piles of the pernicious pillars themselves. Hundreds of them! After they ate the leaves off my rose bush, I decided I had to take action. So I consulted an Ortho book, purchased some liquid sevin and a sprayer, and doused the trees as far up as I could spray. The herd seems somewhat less numerous now (but then, nothing they like has any leaves left). But the previous commenter who remarked about their propensity to cause rashes seems to be on to something. I thought I had poison ivy-related lesions on my legs, but now I wonder if this wasn't caused directly by the caterpillars. (I did find some of the critters climbing my legs while I was on the ground trying to fix the mower). I previously theorized that the caterpillars had visited poison ivy prior to visiting me, but that was half in jest. (Why couldn't they just eat the poison ivy instead?) Update: Apparently, the tent caterpillars really are poisonous. [HYPERLINK@www.ag.auburn.edu] Negative WaterCan2 On May 24, 2008, WaterCan2 from Suffolk County, LI, NY (Zone 6b) wrote: Found one on some honeysuckle vines and took some pics of him, found out how destructive they are after I had already let him go... near my garden! Ugh!! Negative nancyjorg2 On Jun 2, 2008, nancyjorg2 from River Forest, IL wrote: These caterpillars totally stripped my weeping cherry tree and several Annabelle Hydrangeas. I caught a nest in my weeping crab apple before they could do damage there too. After spraying last weekend, I'm finding new leaf growth on the hydrangeas and it looks like little buds are starting to form on the totally naked weeping cherry. This all happened while away for just one week! These are terrible pests in the garden and the worst I've seen in 10 years.

By melody By melody By Sarahskeeper By DiOhio By onewish1 By onewish1 By onewish1 There are a total of 13 photos. Click here to view them all!