none A life table was developed for two consecutive univoltine generations of the red sunflower seed weevil, Smicronyx fulvus LeConte, a major pest of cultivated sunflower in North Dakota. A mean mortality of 86.9% for fifth instar and pupa in the soil was the highest for all life stages. A 94.6% generation mortality indicates a slightly declining weevil population for the two years of the study. Nutrition; Diet; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Diseases and disorders; Diseases; Microbial diseases; Ecology; Population dynamics; Habitat; Terrestrial habitat; Land and freshwater zones; Nearctic region; North America; USA Smicronyx fulvus (Curculionidae); Fungal parasites; Hymenopteran parasites; Nealiolus curculionis; Plant hosts; Helianthus annuus (sunflower); Fungal diseases; Metarrhizium; Source of mortality; Life tables; Plant host; Mortality; Influencing factors; Predators; Formica cinera (Hymenoptera) & Therevidae (Diptera); Sources of mortality; Soil habitat; Mortality factors; North Dakota; Leonard; Life tables & mortality factors Furcifera rufiventris (Diptera ); Thereva candidata (Therevidae ); Formica cinera montana (Formicidae ); Prey; Smicronyx fulvus (Coleoptera); Prey mortality source; North Dakota; Leonard; Coleopteran prey mortality Nealiolus curculionis (Braconidae); Coleopteran hosts; Smicronyx fulvus; Host mortality source; North Dakota; Leonard; Coleopteran host mortality