Choristoneura occidentalis occidentalis(ARCHOC)
Distribution details in United States of America (California)
Current pest situation evaluated by EPPO on the basis of information dated
1994: Present, no details
* Furniss RL, Carolin VM (1977) Western Forest Insects. USDA , Forest Service Miscellaneous Publication no. 1339, 654 pp.
* Richmond, C. E. (1981) Canadian Entomologist 113 (9), 819-825.
* Waters, W. E.; Volney, W. J. A. (1985) Research and Development Paper, Forestry Commission, UK No. 135, 124-131.
------- Low densities in northern California.
* Richmond, C. E. (1981) Canadian Entomologist 113 (9), 819-825.
* Waters, W. E.; Volney, W. J. A. (1985) Research and Development Paper, Forestry Commission, UK No. 135, 124-131.
------- Low densities in northern California.
| Country | State | Status | |
|---|---|---|---|
| Canada | Present, restricted distribution | ||
| Canada | Alberta | Present, restricted distribution | |
| Canada | British Columbia | Present, restricted distribution |