Observations on the Biology of Apple Aphids

Frank H. Lathrop
1921 Journal of Economic Entomology  
The dark males follow the ferr.ales to the plains and foothills, mate during the autumn and die during the winter. During the spring, however, most of the first brood pale green males remain behind on the plains and foothills and probably die after the pasture vegetation becomes dry. After a flight had occurred during the spring, 8% of the specimens colleGtedin the cultivated area were males and 92% were females. After the invasion of the spring brood into the cultivated area 92% of the females
more » ... 92% of the females had mature eggs in the ovaries.
doi:10.1093/jee/14.5.436 fatcat:24lic2x2wzcwrg2gpkdqlhi6lm