Becky, I do hope it works, but I'm thinking you've probably just knocked back the localized infection in the wounds. The Fusarium is in the whole plant by now.
Mine have been slowly declining for a while now, and I'm pretty sure that's the reason. They don't all have open festering wounds like the Charles Grimaldi but the leaves are not as big as healthy plants have, and none of them are showing any new growth, nothing new all summer in fact.
Keep us posted, if the plants perk up and start growing big healthy new leaves that will be an indication that the infection is gone.
