Temperature-Dependent Development of the Convergent Lady Beetle (Coleoptera: Coccinellidae)

摘要: Development of the convergent lady beetle, Hippodamia convergens Guerin-Meneville, was compared at six constant temperatures. Two populations, one from Corvallis, Oreg., and another Tucson, Ariz., did not differ in larval survival or developmental rates. Mortality eclosion first instar to adult emergence 100, 83, 15, 18, 10, 5% 13, 17, 21, 25, 29, 33°C, respectively. oviposition ranged 51.9 d 17°C 11.4 33°C. The heat-unit requirements for development egg were 228 degree-days above a threshold 12.5°C. Published data on H. Ithaca, N.Y., Bushland, Tex., suggest constancy species four widely separated regions North America.