Liquid Fence has a high degree of rain resistance and does not need to be reapplied after each rain, at least it doesn't if it's deer you're trying to repel. The label states that it's effective against deer and rabbits. My experience has been that to deter rabbits one has to spray much more frequently, whether it rains or not. If I had only rabbits to deal with I think I'd conclude that spraying isn't worth the trouble. I've rarely had rabbit damage on my mature roses, but they play havoc with many other garden plants. The density of the rabbit population in my neighborhood seems to vary dramatically from year to year. When the population levels are high, the amount of damage they can do overnight is mind-blowing. If I had to choose between having only a deer problem or only a rabbit problem, I'd agree to keep the deer around. No contest there, IMHO.

rebeccah, there are many species of insects that are larval when immature. I identify insects for a living. If you post a good picture of what you're seeing I might be able to give you a rough idea of what your dealing with.

Could not find where to upload images so i am adding to my clippings on My Page...

Whether they can or can't crawl back up, new crops of them hatch out all the time. Like aphids, Japanese, Fuller, Curculio and other beetles as well as all other insects which suck or chew the plants, you have to continually battle them during their "season" using whatever methods you've selected. I'm not recommending any method nor attempting to encourage you to go "nuclear" on them, but the less toxic your method, the more interactive you have to be with the control. With more generations regularly hatching from eggs, and more eggs being deposited as long as conditions favor their reproduction, new "slugs" are appearing daily or every few days. So, if you're knocking them off, picking them off or washing them off, you have to be diligent at it. Pick, knock or wash them off daily or every few days as your time, energy and infestation dictate. Or, go with an organic control like the bacterial Spinosad, which knocks down all of the hatched slugs at once for two weeks. That has to be sprayed twice monthly unless it's all washed off by a heavy rain. Yes, it can kill the predators, too, but all "insecticides" will. The point is, you have to determine whether you want to constantly battle them or take stronger measures against them. They not only cause unsightly damage, but ANYTHING which reduces the green leaf area of the rose, inhibits, reduces its ability to feed itself. Reduce the leaf surface area sufficiently and you inhibit the plant's immune system, weaken the plant,by causing it be malnourished, making it more susceptible to other damaging factors such as fungal attacks and potential freeze damage in winter, if that is a possibility where you live. Kim