Can I Cast Infestation on the Stick?

A seven foot tall goliath in a robe appears out of nowhere and starts like fixing a big stick. Can I cast infestation on the stick? Yeah. What does that do? It's a cantrip. He hands you each a berry and then he just looks at you. Since you put bugs in my stick I thought you were assholes so I gave you this berry. But since you gave me the crawfish truthfully I'm I'm going to lay it out clean for you. You guys see he's wearing this dark orange robe. His skin is like this very very pale white. He's got blue and brown like tribal markings running down his face and his body