Entomopathogenic-fungi-target
Guides
Sitophilus
Grain Weevils
Sitophilus is a genus of weevils comprising approximately 14 species, several of which are major pests of stored grain, nuts, and seeds worldwide. The genus includes three of the most economically significant stored-product insects: the rice weevil (S. oryzae), wheat weevil (S. granarius), and maize weevil (S. zeamais). Adults are characterized by a pronounced rostrum and elbowed antennae. Females bore into individual grains to deposit single eggs, sealing the hole with secretion; larvae develop entirely within the grain, often leaving it hollow upon emergence. Many species maintain intracellular symbiotic relationships with γ-Proteobacteria that supplement their nutrient-poor cereal diet.