Thrips are easier to treat the sooner they are spotted. Start by rinsing and shaking off leaves in a shower or with a hose. This will dislodge any adult Thrips hanging on to leaves and feeding off your plants. Secondly, spray and wipe your plant leaves down with insecticides. Insecticides will help kill any lingering Thrips. Third, lightly sprinkle diatomaceous earth under leaves and top of the soil to help rid Thrip eggs as they hatch. Lastly, repeat insecticides weekly until there are no signs of Thrips remaining.