Use Diazinon or Orthene when the mines are first noticed. Scales of various types may infest holly. Crawlers can be controlled with Orthene, Diazinon, or malathion. Two to three sprays may be needed at 7 to 10 day intervals when Orthene is used. The other two chemicals are used when ever the crawlers are present.
Spider mites cause discoloration and speckling of holly foliage.
Use sprays of Orthene. Diseases Tar spot may occasionally cause small yellow spots on the leaves in summer. Eventually the spots turn reddish brown with narrow yellow borders. Leaves may not drop prematurely but the infected areas drop out leaving holes in the leaves. Gather up and destroy badly infected leaves.