Potato aphid
early enough in the season, the death of young plants. Retarded growth and defoliation reduce yield. Plant sap is rich in sugars, but has a low protein content [...] quantities of sap to get sufficient protein. The excess sugar is secreted in the form of honeydew, making the crop and its fruit sticky. Black fungal moulds [...] but may also be pink or red (especially in tomato), depending on the food source. Even the winged forms can be red. Wingless potato aphids are 1.7 - 3