Black bean aphid
Plant sap is rich in sugars, but has a low protein content. Aphids therefore need to extract large quantities of sap to get sufficient protein. The excess [...] Aphids have a complex life cycle, with both winged and wingless forms of adults and a great variety in colour. In greenhouses, reproduction takes place by [...] widespread in temperate regions, where it is a serious economic pest of beans. It is highly polyphagous, and attacks a wide range of other crops. Damage symptoms