oa Journal of the Entomological Society of Southern Africa - The Russian wheat aphid; Diuraphis noxia (Mordvilko); Population dynamics and effect on grain yield in the western Orange Free State

Volume 49, Issue 2
  • ISSN : 0013-8789



The newly emerged crop was colonized primarily by D. noxia apterae from volunteer wheat. The infestation was spread by apterae migrating from plant to plant. There were indications that wind assisted the process. More persistent infestations caused significant loss in grain yield, particularly if colonization of the flag and second leaf occurred. There was no evidence to suggest that an aphid transmitted pathogen was associated with reductions in yield.

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