Boxwood Leaf Psyllid

Signs of Damage

  • Leaf cupping from nymphal feeding is a distinguishing symptom.
  • As new foliage is rapidly growing, nymphs use their piercing sucking mouthparts to feed on young leaves and buds.
  • Later in the season the plant may outgrow the damage since there is only one generation per year.

Physical Appearance

  • Adults look similar to tiny cicadas and jump as plant lice in May and June.
  • Nymphs are covered with white, waxy filaments and can be found near developing leaves prior to May.
  • Eggs are orange, small, and are deposited in leaf buds in late summer and early fall.


  • Nymphs begin feeding on tender new leaves and buds. Nymphs go through several instars before molting into adults in early June.
  • Adults emerge in late May or June as jumping plant lice.
  • Insect overwinters as eggs laid in the buds.
  • One generation per year.

Treatment Strategy

Damage from the boxwood psyllid is mostly aesthetic. Depending on the situation, control may not be necessary. If the population is identified early enough, pruning out affected areas is a possibility. Another option is to use systemic insecticides like Xytect™ or Transtect™, which work from the inside of the plant, controlling actively feeding psyllids.

Use These Products:

Xytect 2F   


M-Pede (Organic)   


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