caterpillar on blackberry
I noticed leaves being eaten on my blackberry (or maybe red-berries). holes in the beginning, but if you let them be for several days, the entire leaf is almost a skeleton...
I looked and saw small, very thin, about half inch long Caterpillar (I think they are at least). almost transparent, the bigger ones a bit green.
Should I let them eat the leaves?
Will this damage my fruit (I care about the fruit, not the leaves)
Are there any organic ways of protecting the plant from them in case I need to?