title: Temporary immunity in alfalfa ordinarily susceptible to attack by the pea aphid.
authors.forename: W T
authors.initials: WT
authors.lastname: EMERY
mesh_terms: D000818:Animals; D001042:Aphids; D001522:Behavior, Animal; D000455:Medicago sativa; D018532:Pisum sativum; D012919:Social Behavior