aphid ( image : Dept Ag)

ant farming aphids (image: KENPEI)

Anaglyph SEM image of Aphis fabae, magnification 20x: SecretDisc

All aphids use sucking mouthparts to drain plant tissues of nutrients and water. Look for curling leaves and pale coloration. Dry weather often sends populations soaring.

Often you will find ants farming these critters, as well as defending them against predators. Sometimes discouraging the ants will be very helpful in reducing aphid populations.