Since thrips are extremely tiny, crawl quickly to dark protected areas of the plant when disturbed, and hide in buds, they are very difficult to find even with a magnifying glass. However, thrips are attracted to yellow. Yellow cards coated with a sticky oil can be placed near a suspected infestation. If thrips are present, they will become trapped on the cards. Mist plants every few days to wash off adult and larvae thrips, or apply foliar pesticides every five days.
Many pesticides are effective against thrips.
Be sure the pesticide is designed for indoor plants and follow all pesticide directions carefully.