I don't know, but I wonder if Amazon has user reviews? That is an amazing resource for the lowdown on products.

Works great for me. I used it on roses for years successfully, doesn't wash off in rain but you do have to watch for those growth spurts and make sure new foliage and buds are protected. Remembering to respray the day after deer have visited doesn't help.

I didn't bring roses with me but have much heavier deer pressure in this new location. Still good results with the Bobbex. Our deer aren't particularly starving with little to no winter snow cover, but they are here every day year round and right now the fawns are learning their tastes and will sample just about anything. They will leave the plants alone that I've sprayed, I wouldn't be without it.

The scent to our noses dissipates in a couple of hours - don't spray into the wind though ;).