I bought 4 small plants on ebay Penny

Thanks for the suggestion. I know there is someone on here that sells as well. I will try to find out his name.

You can also use fennel, parsley and dill. They don't mind switching food, as long as they get to eat. Just today I switched my parsley eatin' cats to fennel, and they didn't miss a beat.

Others here have purchased the above items at organic grocers, but you have to wash the herbs with soap and water and rinse well. Even organic pest control can be fatal to caterpillars.

Have you tried plant wholesalers in your area? Is there a Botanical Garden near you? They might be able to suggest where to find some. What about your local chapter of NABA? Below is contact info, unfortunately no email or phone was provided.

NABA-Central Susquehanna Valley
Donald Brobst - President
467 Park Ave.
Lock Haven, PA 17745

If you have no luck, I can still get rue, fennel and parsley at a nursery near me and would be happy to ship you some. I'm pretty sure they would ship OK using the technique for shipping Hosta, which I've done before. They are shipped bare root, wrapped in wet paper towels, then plastic. I'm pretty sure I could come up with an insulated styrofoam box since I work in a hotel -- we get our fresh fish in those.
I would have to know by tomorrow morning, since I wouldn't be able to get to the nursery during the week.

They will not use parlsey, fennel or dill, thats BSTs

I agree, BSTs will eat rue AND parsley/dill/fennel, but GSTs won't.

Shady Oaks sells rue; might want to ask about the ToT because it usually takes me at least a week to get my plant orders in. I bought the rue I have now at a local nursery, but as they're starting to do end-of-season clearances, it's much harder to find. Might have to call around to more nurseries in the area...

Thank you every one for your suggestions. I am aware that BSTs use parsley, dill, fennel and that GSTs only use rue, wild lime, and some trees from the citrus family. I have already spoken to Shady Oaks, they are out of rue. No one seems to have gotten very many shipments this year. The one place where I got my plants originally was supposed to get in another order and never did.

Gwynne

Can you find a citrus tree?

Do you have a Freecycle group in your area? It is very easy to sign up - all you need is a Yahoo id. You could try posting a "Want" for Rue plants. It is an unusual item, but someone in the Freecycle network might have access to some.

You could try finding some Prickly Ash (Zanthoxylum americanum) locally. It's the native GST host plant in northern areas. Since you've got GST's in your area, it's likely that there are some plants near you. Here's the distribution of Prickly Ash in PA:
http://plants.usda.gov/java/county?state_name=Pennsylvania&statefips=42&symbol=ZAAM

Your local County Extension agent or the Parks and Recreation Department might know the location of some in your local area.

Here is a link that might be useful: Prickly Ash distribution in PA

Thanks everyone for taking the time to respond. We dont have any citrus plants in Pennsylvania. At least not that I know of. I did try ebay but no one was selling rue. I will try the prickly ash distribution link. Thank you for providing it, Northeastwisc, and that you everyone for your suggestions.