none no species Overwintering larva of C. adspersus (LeConte) in roots and lower stalks of cultivated sunflower began pupating from early to mid-March in 1978 to 1980 at Bushland, Tex. Eclosion to adults occurred from late March to early April. Adult emergence from sunflower began in mid-March in 1978, and early April in 1979 and 1980. Mass emergence of adults occurred in early May each year and was completed by mid-June. Overwintering populations of C. adspersus averaged 38.1 and 19.7 larvae per plant during winters 1978-1979 and 1979-1980, respectively. Overwintering mortality from unknown causes ranged from 6 to 15%, and that from parasitism ranged from 2.8 to 5.3%, during winters 1978-1979 and 1979-1980. Whole animal physiology; Nutrition; Diet; Life cycle and development; Development; Metamorphosis; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Host parasite relationships; Ecology; Population dynamics; Land and freshwater zones; Nearctic region; North America; USA Cylindrocopturus adspersus (Curculionidae); Dormancy, food plant habitats & mortality; Food plants; Helianthus (sunflower); Larval overwintering habitats; Metamorphosis; Pupation phenology; Emergence from pupa; Phenology; Hymenopteran parasites; Nealidus & Neocatolaccus tylodermae; Mortality of overwintering larvae relationship; Prevalence; Nealiolus & Neocatolaccus (Hymenoptera); Mortality; Overwintering larvae, parasitism relationship; Texas; Bushland; Larval dormancy on food plant, emergence phenology & mortality Nealiolus (Braconidae ); Neocatolaccus tylodermae (Pteromalidae ); Coleopteran hosts; Cylindrocopturus adspersus, host mortality relationship; Prevalence; Cylindrocopturus adspersus (Coleoptera) larvae; Texas; Bushland; Prevalence in coleopteran host larvae