Larger Grain Borer vs American Grannom
Side-by-side species comparison
| Attribute | Larger Grain Borer | American Grannom |
|---|---|---|
| Scientific Name | Prostephanus truncatus | Brachycentrus americanus |
| Order | Coleoptera | Trichoptera |
| Family | Bostrichidae | Brachycentridae |
| Size | 3-4.5 mm | 9-13 mm |
| Habitat | Gardens | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | Africa, Central America | North America |
| Conservation | Not Evaluated | Least Concern |
Larger Grain Borer
A devastating pest of stored maize and dried cassava in Africa. It can cause grain weight losses exceeding 30% in untreated stores.
Did You Know?
A predatory beetle, Teretrius nigrescens, was introduced to Africa as a biological control agent against it.
American Grannom
A case-building caddisfly whose larvae attach their cases to rocks in fast current and filter-feed. Cases are chimney-shaped and built from silk and plant fragments.
Did You Know?
Larvae can switch between filter-feeding and scraping algae depending on current speed.