I believe the problem with any rice is that it is a carb easily turned into sugar by the body and gobbled up by candida. Some people have cured their infestation with brown rice, but it will be more difficult. I believe the same goes for quinoa (but I’m not sure). If you’re looking for a brown rice pasta substitute, there is buckwheat pasta.
The problem with nuts is that as a dried item, they often also have moulds on them which will both feed the candida and hurt your immune system. Personally, a lot of my symptoms diminished when I stopped eating almonds.
I don’t know about pumpkin or squash.