Do these little monsters attack Manfreda as well as Agave? On our campus we have both genera and some of the Agaves have been attacked by the evil weevils and I want to get rid of them on both if I need to.

I know they will go after Yuccas, but not sure about Manfredas.

I'm not sure, either. I would imagine that the weevils would be more motivated by a monocarpic plant than a polycarpic one, all things equal, given the energy being stored up for flowering.

The genus "Manfreda" has been merged back into Agave. I'm sure the wevils never thought there was difference, and munch on all of them.