The pest named thrips are found in greenhouses and gardens that suck the juices of the plants. They are about 1/20 of an inch with over 5,000 species. You cannot see it with naked eye easily as they are very tiny in size. With the naked eye, they appear like little dark thread. Some are without wings, and some have fringed wings. They move very fast and is present in many forms of vegetation like carrots, onions, beans, squash, flowers like gladioli and roses.