Arthropod Pests of Leyland Cypress
- Green or brown cone-like bags 1/4"
*Hand pick bags any time of year
- Browning noted during Summer or Winter
*Horticultural oil, Floramite, Hexygon, sprayed in cool season while mites active. Follow-up sprays often required with oil.
Arborvitae Spider Mite
-Adults generally pale yellow-green
* Horticultural oil or other miticides, Hexygon ovicide. Repeat 14 days later.
Minute Cypress Scale
- Minute armored scale
* Horticultural oil during crawler stage
- Foamy spittle masses on twigs
*Wash away with water hose
- Grubs bore under bark and at root collar
*Protective bole and base sprays in spring with Astro or Onyx. * Astro or Onyx foliar sprays in early spring for foliage feeding damage
- Armored scale 1.5mm, long oystershell-like
* Horticultural oil during crawler stages with follow up at 14 days
Phloeosinus sp. Bark Beetles
- Reddish brown-black, 2-3mm long
* Avoid drought stress
Dr. Bob Lyons, former director of the J.C.
Raulston Arboretum at NCSU, suggested the following plant material
as a similar alternative to Leyland Cypress.
Thuja 'Green Giant' and cultivars of Cryptomeria japonica .
and cryptomeria are susceptible to many of the same insects. No plant is perfect.
To reduce overall pest problems with plant screening borders, try diversity
by alternating dissimilar plant material in groups of threes or fives. Check
what works best in your area. Some possibilities are ligustrum, abelia, rhododendron,
wax myrtle (Myrica), magnolia and forsythia.
Al Cooke has assembled a list of evergreen screening plants for Chatham County.
Recommendations for the use of chemicals are included in this publication as a convenience to the reader. The use of brand names and any mention or listing of commercial products or services in this publication does not imply endorsement by the North Carolina Cooperative Extension Service nor discrimination against similar products or services not mentioned. Individuals who use chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. Be sure to obtain current information about usage and examine a current product label before applying any chemical.
For assistance, contact your county North Carolina Cooperative Extension Service agent.
Distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age, or disability. North Carolina State University at Raleigh, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating.