Bean aphids cluster on stems and under leaves. Also beet, carrot, corn and squash. Leaves curl and thicken, plants become yellow and unthrifty.
Aphids spread virus of common bean mosaic.
Localized aphid infestations can be hand-picked or pruned out. Before planting vegetables, check surrounding weeds and other plants for aphids and destroy where found. Remove any aphids discovered on transplants before planting. Always remove all crop residues immediatly after harvest. Insecticidal soap, horticultural oil, or Neem oil.