"Feathered locusts arrive in Cape" is the title of an article published by John Yeld in the Cape Argus on 24 April (p8), where the breeding event near Worcester and the potential impact is described . This was followed by more details on the problem of quelea in Africa in "Flying pests are breeding trouble", including comments by Sir Clive Elliott, in the Cape Argus on 29 April (p10).
Read the web version of the first story here. See also follow-up story here