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Table Legend

* Degree of importance of pest: I = Important pest, high probability of occurrence, II = Treat as needed: III = Occasional pest, treat when detected.
** Number of applications needed for most effective control. It is usually best to wait 10 to 14 days between applications in cool weather and 7 to 10 days between applications in warm weather.
S = Spray application; R = Rouge out.

The Leyland Cypress Pest Management Calendar

The Leyland Cypress Pest Management Calendar gives approximate dates of pest emergence.

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This Insect Note has not been peer reviewed.

Leyland Cypress Pest Management Calendar

Skip to Leyland Cypress Pest Management Calendar

The Leyland Cypress Pest Management Calendar gives approximate dates of pest emergence.

Leyland Cypress Pest Management Calendar

Pests Degree of Importance of Pest* Number of applications** Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
bagworms II 2 Spray Application Spray Application Spray Application Spray Application Spray Application
juniper scale II 2 Spray Application Spray Application Spray Application Spray Application Spray Application Spray Application Spray Applications Spray Application Spray Application Spray Application Spray Application Spray Application
spruce spider mite III 1 Spray Application Spray Application Spray Application Spray Application Spray Application Spray Application Spray Application Spray Application
canker (disease) II 2 Rouge out Rouge out Rouge out Rouge out Rouge out Rouge out Rouge out Rouge out Rouge out Rouge out Rouge out Rouge out

* Degree of importance of pest: I=Important pest, high probability of occurrence, II=Treat as needed: III=Occasional pest, treat when detected.

** Number of applications needed for most effective control. It is usually best to wait 10 to 14 days between applications in cool weather and 7 to 10 days between applications in warm weather.

Authors

Professor and Extension Specialist
Entomology & Plant Pathology
Professor Emeritus
Entomology & Plant Pathology

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Publication date: Jan. 26, 2019
Revised: Nov. 9, 2023

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