I just want to cry.... :o(

knottyceltic(S/W Ontario 5b)June 29, 2005

This year for whatever reason (bumper year for the pests) these little green worms are eating my ENTIRE WOODS! My columbines are gone for the second time and I'm afraid this time they are TOAST but now all the forest plants are affected by them and are getting gobbled up like mad. My little woods looks HORRID, they are getting my Redbud tree, my Beech tree, both my serviceberries, my dogwoods, witchhazel, my viburnums and all the ground plants are toast... virginia bluebells GONE! I don't know what to do. I've never used a pesticide before and I'm not keen on it but these things are devastating our woods and I think it's because all our neighbors (woods also) have either sodded their woods or used roundup so we are one of the few with actual foliage and are getting hit VERY hard. Please help, these things can destroy half a shrub in one night's work and I don't have much time left before all the shrubs are bare.

Barb

Thank you for reporting this comment. Undo
kwoods(Cold z7 Long Is)

Usually a population explosion in one species is followed by a population explosion in another species a bit higher up the food chain. Long term you could try and encourage predator species like birds and parasitic wasps. You'd have to figure out what the critter is first and what eats it.

But, that doesn't help you now does it? First thing I would try is to put some soap in a hose end sprayer and see if you can knock 'em off the stuff you value most. Then I would call the equivalent of your local county extension office and see if they know what they are and whether they can suggest a remedy. You can usually send a sample for ID.

Good luck!

    Bookmark   June 29, 2005 at 1:50PM
Thank you for reporting this comment. Undo
felpec(Z5/6 NJ)

I have had good luck using insecticidal soap mixed with neem oil. I, too, refuse to use pesticides, but this concoction works for almost everything here. As an added benefit, the deer and other critters don't seem to like the "garlicky-sulphur" smell (or taste?). We mix up a batch in a small hand pump sprayer and spray away.

Hope this helps!

    Bookmark   June 29, 2005 at 2:30PM
Thank you for reporting this comment. Undo
knottyceltic(S/W Ontario 5b)

Thank you for your suggestions. Do either of you (or anyone) know what those little green worms are that love to eat columbine to the ground? That is what is on everything. My neighbor's roses are chewed all up in half-moon circles, their lilac and their sand cherries, all bombarded with these little green worms. Forget Columbines this year, they will eat one to the ground in one night. I've lost 3 completely and they aren't growing back for the second time this year and a 4th one is about to go. Whatever those green things are they are driving me nuts.

Barb

    Bookmark   July 5, 2005 at 4:59PM
Thank you for reporting this comment. Undo
felpec(Z5/6 NJ)

It is hard to diagnose your problem without seeing the worm - or is it a caterpillar?

Green worms on your columbine could be an inch worm or canker worm. If the caterpillar loops up in the center or arches as it moves along, it could be a looper or cabbage worm.

    Bookmark   July 5, 2005 at 5:05PM
Thank you for reporting this comment. Undo
knottyceltic(S/W Ontario 5b)

It's sawfly larvae. I bought malathyon but it, nor any other pesticides I looked at mention sawfly or sawfly larvae on the label. It seems like a fairly broad spectrum pesticide though, so it should work. I'm not into using pesticides but at this point we are losing hundreds of dollars worth of plants from one day to the next and I'm desperate.

Barb

    Bookmark   July 6, 2005 at 4:43PM
Thank you for reporting this comment. Undo
rhizo_1 (North AL) zone 7

Sawfly larvae are fairly easily controlled with insecticidal soap applications. Spray in the evening when you are likely to get the most benefit from the solution.

Columbine sawfly larvae are a very common pest of this plant. Best to keep your eyes out VERY early for the insects, before they grow big enough to do much damage.

Insecticidal soap will do less injury to whatever balance of beneficials you may have in the area, than the malathion.

Here is a link that might be useful:

    Bookmark   July 7, 2005 at 2:28PM
Thank you for reporting this comment. Undo
kwoods(Cold z7 Long Is)

Malathion is bad for you and bad for the enviornment. We have been fighting here on Long Island to get them to stop arial spraying of mosquitos w/ it. It is believed it may have decimated the lobster population in LI Sound by causing problems w/ their nervous systems. After many expensive lawsuits they have mostly stopped using it. I would try soap or neem oil or something as specific to the pest as possible first. Broad spectrum insecticides often create many new problems long term that one might not even think of.

    Bookmark   July 7, 2005 at 3:08PM
Thank you for reporting this comment. Undo
mrbreeze(z6/7 OK)

Something with BT, bacillus thoringiensis, a naturally occuring bacteria, is typically recommended for caterpillars. For what ever reason it specifically attacks them (which is why its so effective for mosq. larvae), and leaves other things alone. Its perfectly safe around kids, pets, fish, other plants, etc. Its widely available in various forms. Another thing you could try is diatomaceous earth. You can sprinkle the powder on your plants and ... in theory anyway...the sharp edges of the tiny particles will pierce the skin of the worms thus repelling and/or killing them. Good luck!

    Bookmark   July 12, 2005 at 2:30PM
Thank you for reporting this comment. Undo
reg_pnw7(WA 7, sunset 4)

Bt will not work on sawflies. Bt only works on caterpillars and sawflies are not caterpillars. Caterpillars are larvae of butterflies and moths - Lepidoptera. Sawflies are in the wasp and bee order - Hymenoptera. Bt will not work on anything except Lepidoptera, except for Bt var. israellensis which is used for mosquito larvae which are in the order Diptera (flies and mosquitoes). So Bt is too specific to work on sawflies. DE, on the other hand, is not specific at all but kills anything soft bodied including any soft bodied larval predaceous insects such as ladybugs, syrphid flies and lacewings. As well as being damaging to our lungs when we breathe in the dust while working with it. The insecticidal soaps and neem oil sprays unfortunately are also as damaging to these beneficials as they are to any pests.

    Bookmark   July 16, 2005 at 4:22PM
Thank you for reporting this comment. Undo
knottyceltic(S/W Ontario 5b)

Thanks for the info everyone, I'm taking notes...

Barb

    Bookmark   July 17, 2005 at 4:09PM
Thank you for reporting this comment. Undo
knottyceltic(S/W Ontario 5b)

Thanks for the info everyone, I'm taking notes...

Barb

    Bookmark   July 17, 2005 at 7:30PM
Thank you for reporting this comment. Undo
jim127(5 IL Balcony)

knottyceltic, I'm wondering what you tried and did it kill the lgm (little green monsters)?

    Bookmark   July 22, 2005 at 9:59PM
Thank you for reporting this comment. Undo
twickers

I have a shrubby native dogwood of some type which gets denuded every year. The "worms" appear in their early stages as white flecks, after the plant blooms, which grow in size and turn green. If you wait until they are green it is too late. I usually did not notice until the infestation was well underway. This year, out of desperation, I took a small spray bottle, filled it with straight vinegar and a dollop of Ivory Soap .. and sprayed the area with the first tiny white "worms" I saw. The ends of a few branches were damaged so I cut them back and discarded them. The "worms" fell off so I misted the entire plant. As it was dry and hot I did not reapply. A few leaves browned a bit where I got them too wet.. but I saw nothing for about six weeks. A tiny number of hungry critters started to appear on one branch so I re applied the treatment. It is almost September and my shrub is hale and healthy ..In past years it is just sticks by now. Vinegar is cheap and reasonably natural. but you have to catch the outbreak early on.

    Bookmark   August 29, 2010 at 4:46PM
Sign Up to comment
More Discussions
Poison-free woodland plants
I am planning a small shade garden in the back side...
mary420
Bittersweet
I am wanting to find some bittersweet. I am willing...
ohiocrafter
anyone have a fairy glen fern?
or know of a place to get one?
bragu_DSM 5
Jack in the Pulpit Propagation
A youth group cleaned my garden and clipped three JITP...
Elgie
questions on English ivy
I'm in zone 6, suburban New Jersey, and have a yard...
loris
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™