none Studies were conducted in the northern Texas rolling plains from mid-September to early November 1977 to 1979 to determine the amount of fall boll weevil, Anthonomus grandis grandis Boheman, mortality occurring in cotton squares. Apparent and real mortalities were determined for the immature boll weevil stages-egg to 1st instar, 2nd to 3rd instar, pupa, and teneral adult-for each weekly field-collected cohort. Total real boll weevil mortality increased from 40 to 70% in early October to 100% by late October each year. Parasites caused a significant amount of indispensable boll weevil mortality during early October, but parasitization was not high enough throughout the fall to effectively control the boll weevil. Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Ecology; Population dynamics; Habitat; Man made habitat; Abiotic factors; Physical factors; Land and freshwater zones; Nearctic region; North America; USA Anthonomus grandis grandis (Curculionidae); Hymenopteran parasites; Bracon mellitor; Eurytoma herrerae & Catolaccus hunteri; Mortality; Autumn, life cycle stage & hymenopteran parasites relationship; Cultivated land habitat; Climate and weather; Autumn mortality relationship; Season; Mortality pattern relationship, cotton fields; Texas; Foard & Hardeman Counties; Autumn mortality in cotton fields, hymenopteran parasite & weather factors Bracon mellitor (Braconidae ); Eurytoma herrerae (Eurytomidae ); Catolaccus hunteri (Pteromalidae ); Coleopteran hosts; Anthonomus grandis grandis; Host seasonal mortality relationship; Texas; Foard & Hardeman Counties; Coleopteran host seasonal mortality effects