Thrips are sap suckers about one sixteenth inch long, colored yellow, green or black with finely fringed wings that give them a fuzzy appearance. They seldom fly and are more likely to jump, like springtails. Thrips can attack any fairly soft leaves, causing mottling or streaking. They also attack flowers which then develop white spots.
Thrips are attracted to blue and sometimes yellow. Make sticky traps to catch them.
Coffee grounds make excellent mulch around acid-loving plants.