Studies on the biology of· icerya pattersoni (newst.) (hemiptera: margarodidae), a coffee pest in Kenya
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An account of laboratory and field experiments carried out at the Coffee Research Station, Ruiru, Kenya to study the biology of the scale insect, Icerya pattersoni (Newst) (Hemiptera: Margarodidae) on coffee varieties is given. The insect has recently assumed a pest status in Kiambu District in Central Province, Kenya. Prior to 1980 it was not reported as a pest.