Christmas tree pests and weeds required restrictions and requirements to be placed upon Christmas tree growers with plantations in "gypsy moth regulated areas". The restrictions and requirements included ongoing site monitoring, active moth eradication by the grower, accurate record keeping, and government directed moth eradication programs. Failure to abide by the rules could result in revocation of the "approved grower" status from the Canadian Food Inspection Agency. The major types of conifers cultivated, pines, Douglas-firs, true firs, and spruce trees, are all affected by some types of insect pests. Douglas-firs are most vulnerable to the Cooley spruce gall adelgid. The true firs are most susceptible
Fraser Canyon Gold Rush "humbug". Many returned to San Francisco. A continuing influx of newcomers replaced the disenchanted, with even more men storming the route of the Douglas Road to the upper part of Fraser Canyon around Lillooet; others got to the upper canyon via the Okanagan Trail and Similkameen Trail, and to the lower Canyon via the Whatcom Trail and the Skagit Trail. All these routes were technically illegal since the Governor required that entry to the colony to be made via Victoria, but thousands came overland anyway. Accurate numbers of miners, especially on the upper Fraser, are therefore difficult to reckon. During