Godfrey, L. D.; Natwick, E. T.; Goodell, P. B.; Long, R. F.; Barlow, V. M. (January 2017). "Spotted Alfalfa Aphid Therioaphis maculata Agriculture: Alfalfa Pest Management Guidelines". UC Agriculture (UC ANR), UC Integrated Pest Management (UC IPM). 3430. Retrieved 2022-07-27.
Further reading
Foottit, R. G.; Halbert, S. E.; Miller, G. L.; Maw, E.; etal. (2006). "Adventive aphids (Hemiptera: Aphididae) of America north of Mexico". Proceedings of the Entomological Society of Washington. 108 (3): 583–610. ISSN0013-8797.
Skvarla, Michael J.; Halbert, Susan E.; Foottit, Robert G.; Jensen, Andrew S.; etal. (2017). "An Update to the Adventive Aphids (Hemiptera: Aphidoidea) of America North of Mexico, with Notes on Intercepted Species". Proceedings of the Entomological Society of Washington. 119 (1): 90–111. doi:10.4289/0013-8797.119.1.90.