Description: Whitefly Predators are fast eaters; they eat one whitefly larva in just 30 seconds. Imagine what these hungry helpers can do for your garden as they munch up to 600 whitefly eggs every day! 300-500 predators cover 1,000 square feet. To use, just shake the predators out of their package onto plant foliage. Predators do best between 65-90 degrees