1. Shearing of balsam fir Christmas trees should begin when the tree is:
a) about 1 metre in height b) over 2 metres in height c) bursting its buds in the spring d) overtopped by vegetation 2. Insect pests of balsam fir include:
a) spruce budworm b) balsam woolly adelgid c) balsam gall midge d) all of the above 3. Wreaths and sprays can be made from:
a) balsam fir tips b) red-twig dogwood c) birch twigs d) all of the above 4. Balsam fir twigs and needles can be distilled to make:
a) paclitaxel b) essential oils c) xylitol d) none of the above