Cannas and bugs eating leaves
Our cannas plant has holes in the leaves from something eating it. We have never actually seen in bugs on it, but it's definitely being munched on by something. The plant is in our koi pond. Is there something we can use on the plant to keep the bugs off that is safe for the fish?
Without knowing what is eating your leaves(species wise) it is very hard to recommend a solution. Possibly using a garlic barrier spray repellent may work, but with out knowing what the culprit is. The only other method would be exclusion, using a very fine mesh cloth or screen to form a barrier to keep them out. No easy solutions.