Control measures of thrips in watermelon

The nymph and adult thrips insect, suck the cell sap by scraping the leaves of watermelon plants, on the soft stalk, buds and flowers of the plant, it becomes curly because of thrips infestation. Due to its effect, the plants remain stunted.
To control thrips, spray Lambda Cyhalothrin 4.9% CS @ 200 ml/acre or Profenophos 50% EC @ 500 ml/acre or Fipronil 5% SC @ 400 ml/acre at 15 days interval.
Use the pesticide at an interval of 15 days.