Thrips
feed on all aerial parts of the plant and are fairly mobile. Immediately after hatching, the larvae begin to feed on plant tissue on the underside of the [...] soft parts of stalks. On the leaves of sweet pepper, for instance, these egg-laying sites are recognizable as wart-like growths, whereas on most other [...] both pairs of wings are fully developed. Only at this stage can the particular species of thrips be identified based on form, colour and pattern of hairs.