Aphids
ornamental crops. Aphis gossypii ( cotton aphid ), mainly on Cucurbitaceae, but also on chrysanthemums, and sweet pepper. Macrosiphum euphorbiae (potato aphid) [...] cluster on the undersides of leaves, where they feed on plant sap. They may also be found on stems, buds, flowers and fruit. Damage: Aphids can cause damage [...] curling or distortion of the leaves, yellowing, or discoloration. They may also excrete a sugary substance called honeydew, which can attract other insects