Canadian Forest Service Publications
Evaluation of chemically controlling and Collembolan Bourletiella hortensis on germinating Sitka spruce and western hemlock in the nursery. 1976. Marshall, V.G.; Ilnytzky, S. Canadian Journal of Forest Research 6(4): 467-474.
Issued by: Pacific Forestry Centre
Catalog ID: 1780
Available from the Journal's Web site. †
† This site may require a fee
Three concentrations of the insecticides diazinon, fonofos, malathion, and oxamyl and one concentration of the herbicidal mineral oil Shell AWK No. 1® were tested on Sitka spruce [Piceasitchensis (Bong.) Carr.] and western hemlock [Tsugaheterophylla (Raf.) Sarg.] for controlling the collembolan Bourletiellahortensis (Fitch) in nursery trials in 1972 and 1973. All insecticides were effective against the insect, but low spring populations of the collembolan prevented full evaluation of the trials. A 4-m diazinon-sprayed surround was adequate to keep the insect from migrating to adjacent plots. Certain nursery practices, such as application of the herbicidal mineral oil Shell AWK, the herbicide propazine, and sodium fluosilicate for weevil control, temporarily suppressed B. hortensis populations but did not provide effective control against this insect. Shell AWK, applied when the radicle was emerging from the seed, was apparently phytotoxic to Sitka spruce.