Notes On East African, Aphids Iv-Aphids Of Leguminous Crops

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Date
2000
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Kenya Agricultural Research Institution
Abstract
One root-feeding and five leaf- and stemfeeding aphids are described here. Trifidaphis phaseoli (Pass.), a white globular aphid without siphunculi and with short legs and antennre, occurs on the roots of many dicotyledons in addition to Leguminosre and is sometime$' '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 V-shaped eighth te~gite (Fig. N). Macrosiphum nigrinectafi4r~ Theobald is known only from East Africa:and occurs most commonly on cow pea, Cajanus indicus. This aphid differs most obviously from M. euphorbire (described in Part II of this series) by the completely black siphunculi and the short antennal hairs. Acyrthosiphon pisum (Harris), a large green aphid with a long green cauda and long slender green to dusky siphunculi without hexagonal
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