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
Thai royal and noble titles a courtesy title pronounced with a middle tone, should not be confused with the similarly-spelled tree or the feudal title of Khun (, pronounced in a rising tone). The courtesy title is used for children born to a noble mother who gave up her title to marry a man of lesser rank; a notable example was the late Khun Poom Jensen. Today, this word is used informally to courteously address nearly anyone except those who hold a title of Mom Rajawongse or higher. It is T-V distinct from "thoe" (). Thai royal and noble titles Thai royal and noble titles