The most common species are the onion thrip (Thrips tabaci) and the western flower thrip (Frankliniella occidentalis). They occur in greenhouses and outdoor crops. It attacks horticultural, ornamental and fruit crops.
When the larvae and adults eat the vegetable tissue they inject saliva into the plant, destroying its cells and creating a pearly white stain that goes dark. Thrips lay their eggs in the vegetable tissue, producing wrinkled and discoloured areas. They can also transmit viruses.
It attacks pepper, cucumber, courgette, bean, tomato, eggplant, watermelon, melon, strawberry, rose, gerbera, chrysanthemum and carnation.