Notes on East African Aphids IV - Aphids of leguminous crops

Abstract

One root-feeding and five leaf- and stem feeding aphids are described here. Trifidaphis phaseoli (Pass.), a white globular aphid without siphunculi and with short legs and antenme, occurs on the roots of many dicotyledons in addition to Leguminosa: and is sometimes a pest of potatoes. This aphid, like a number of other root-feeding Fordini, has the cauda and sub-anal plate placed dorsally and enclosed on three sides by the inverted U-shaped eighth tergite (Fig. N). Macrosiphllln nigrinectaria.