I’m guessing these differ vastly from one weevil species to another. What follows is strictly for species with larvae developing inside fruit; those with larvae in the soil, leaf-rolling etc. are completely different matters. Oviposition sites are probably important in many weevil species, both common (those dependant of an abundant resource that may nevertheless fluctuate from year to year – may be your case) and rare (those where the plant may simply produce zero fruit in bad years). I would however not discard parasitoid wasps, especially in abundant weevils. I’d expect a fair bit of recent research, though old sources like Fabre may yet be a good place to start.

The species that I am interested in are Curculio sp. that oviposit in oaks acorns: so the resource fluctuate from year to year and there may happen years with zero seed production. Fabre seems quite and old source, indeed :)

Food and environment are limiting factors of weevils population which again depends upon region specificity, species diversity