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Home → Publications → Forest Nursery Notes → 2009 Winter Forest Nursery Notes → 2009 Winter Forest Nursery Notes - New Nursery Literature → Insecticides Sprayed on Seedlings of Picea Abies During Active Growth: Damage to Plants and Effect on Pine Weevils in Bioassay

Insecticides Sprayed on Seedlings of Picea Abies During Active Growth: Damage to Plants and Effect on Pine Weevils in Bioassay

Luoranen, J. and Viiri, H. Scandinavian Journal of Forest Research 20:47-53. 2005.

In Finland, the planting period for Norway spruce [Picea abies (L.) Karst.] has lengthened from spring to summer so that seedlings are also planted during the active growing stage, not only when dormant. On many regeneration sites, there is a high risk of damage by the large pine weevil, Hylobius abietis L., and insecticide treatments are needed to protect seedlings against these weevils. However, all currently available insecticides have been tested and accepted for use only on seedlings that are not growing actively. In this study, actively growing Norway spruce seedlings were treated with three insecticides in mid-June, when the current year's shoot was about 7 em and unlignified.


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Author(s): Jaana Luoranen, H. Viiri

Section: Pest Management