Wax Scale

• Wax scales are sucking insects that feed on the plant's juices. Indian hawthorn leaves with white spots are most likely infested with wax scale. This pest thrives when the weather is warm. Manage a wax scale infestation by applying light, horticultural oil directly on the pests. Repeat the treatment, as the newly hatched scales, called crawlers, infest the shrub. The crawlers are easier to kill and the second application significantly reduces the scale population . Use ladybugs if you prefer a biological control method.
  
  

Bagworms

• Bagworms are pests that create their own shelter out of plant material and spend their lives within this bag. This caterpillar's eggs hatch in spring. The young leave the parent's bag and begin constructing their own, eating the Indian hawthorn's foliage as they work. Heavy bagworm infestations defoliate the Indian hawthorn. The best way to manage an infestation is by hand picking the bags from the shrub and dropping them into a solution of 1 gallon of water and 2 tbsp. of liquid soap. Pesticide sprays containing neem oil kill bagworms.
  
  

Aphids

• Aphids attack many landscape ornamentals, and they are a common problem on roses. As a member of the rose family, Indian hawthorn is susceptible to aphid infestations. Look for aphids in clusters, generally on the undersides of foliage, although they may cluster on stems and flowers as well. Although common aphids are green, some are brown, yellow, red or black. Manage an aphid infestation with insecticidal soap or neem oil spray. These products need to be sprayed directly on the aphids where they block their breathing holes, suffocating them. Small infestations are easily managed with a moderate burst of water from a hose, knocking them off the shrub.
  
  

Fuller Rose Beetles

• Fuller rose beetles are two-segmented, brown beetles with large eyes. They eat the Indian hawthorn's leaves and flowers. Infestation symptoms are evidenced by bite marks on the leaves or leaves snapped from branches. Fuller rose beetles can't fly, so they are easy to manage by destroying anything that acts as a bridge to the shrub, such as other plants' branches. Another management method includes wrapping sticky tape around the shrub's lower canes preventing the beetle from climbing into the foliage. Purchase these can at gardening centers or make your own. Wrap a 6 inch wide strip of duct tape around the cane and smear it with petroleum jelly.