Destroy infected plants. Use yellow sticky traps to reduce whitefly numbers. Since whiteflies are highly resistant to pesticides, select non-susceptible plant species for use in cooler sites. Aphids may be light green, red or black in color. All aphids feed on plant juices, and cause stunted, distorted leaves and unthrifty plants that grow slowly.
Many aphids are resistant to pesticides.
To control a very mild infestation, spray warm soapy water directly on the insects, and then remove the soap with plain water. Destroy heavily infested plants. Thrips Thrips are tiny insects which cause silvery or white spots or streaks on leaves. Infected leaf or flower buds will emerge disfigured and damaged. 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.