Pine and fir trees, grown purposely for use as Christmas timber, are susceptible to a wide number of pests, weeds and diseases. Since the late 1990s its appearance in the United Kingdom has increased, amongst essentially the most affected species is Corsican pine and the illness has been a significant problem in Thetford Forest. Though the disease spread rapidly during September 2007 Christmas tree growers remained assured that Christmas tree crops can be unaffected. Some particular weeds cause extra severe issues, the bracken fern can improve disease in fir timber, and employee morale and effectivity are decreased when weeds resembling poison oak, Canada thistle and wild blackberries infest plantations. Spongy moth infestations in Canada required restrictions and requirements to be placed upon Christmas tree growers with plantations in “spongy moth regulated areas”. The restrictions and requirements included ongoing site monitoring, active moth eradication by the grower, accurate record protecting, and authorities directed moth eradication packages.

The ultimate class of Christmas bushes, ערוץ הגזע (https://telweed.com/the-race-channel/) pines, are generally susceptible to insect infestation and harm from the pine root collar weevil (Hylobius radicis), Zimmerman pine moth (Dioryctria zimmermani), pine needle scale, and white pine weevil. Insect infestations in low numbers will be physically picked or knocked off of bushes by hand. Lots of the conifer species cultivated face infestations and death from such pests as the balsam woolly adelgid and other adelgids. The aphids can cause stunted progress in trees with heavy infestations rendering badly broken timber unsellable. Balsam twig aphids (Mindarus abietnus) are another type of tree pest which impacts fir and spruce bushes within the spring. The balsam woolly adelgid (Adelges picae) are small soft-bodied insects which attack the Fraser fir. By 2002, sudden oak demise had been reported along the California coast and the Oregon Coast, and two species of conifer were identified as hosts of the pathogen, Douglas fir and coast redwood.

Between 2003 and 2005 P. ramorum was detected in Douglas fir, grand fir, white fir and California red fir on Christmas bushes in Santa Clara County. Douglas firs are also affected by Phaeocryptopus gaumanni which causes Swiss needle cast. Species of spruce trees face assault from insects such as the white pine weevil (Pissodes strobi), Cooley spruce gall adelgid, and the pine needle scale (Chionaspis pinifoliae). Douglas-firs are susceptible to the two plant pathogens that cause Rhabdocline needle solid, Rhabdocline pseudotsugae, and Rhabdocline weirii. The conifer species used and cultivated as Christmas trees are susceptible to dozens of different pests, קבוצות טלגרם סמים most of which cause cosmetic damage to the timber, important in the Christmas tree industry. Voles, or meadow mice, telegram weed (https://telweed.com/telegram-weed-2/) could cause injury to conifer plantation seedlings. This can be achieved mechanically, akin to via audio recordings of predator birds played near trees, or biologically by introducing predators, resembling lady bugs to eat aphids, to the tree nursery.

Different species of adelgids also infest fir timber, those include the pine bark adelgid, טלאגרס the Cooley spruce gall adelgid (Adelges cooleyi), and the eastern spruce gall adelgid (Adelges abietis). Certain species of birds are additionally thought of pests, amongst these is the pine grosbeak which feeds on conifer buds. In the U.S. Pacific Northwest, gopher (pocket gopher) harm to conifer seedlings happens over hundreds of acres, inflicting significant financial loss for the area. In 2002 concern in the U.S. Christmas Tree Pest Handbook, Michigan State College Extension, United States Department of Agriculture, 1997-1998, Index A Archived 2007-08-09 on the Wayback Machine. Christmas Tree Pest Handbook, “Dead Tree and Root Stem Injury”, Yellow-bellied Sapsucker, Michigan State University Extension, United States Department of Agriculture, 1997-1998, Desk of Contents Archived 2007-08-09 on the Wayback Machine. Christmas Tree Pest Manual, עט אידוי קנאביס Michigan State University Extension, United States Department of Agriculture, 1997-1998, Table of Contents Archived 2007-08-09 on the Wayback Machine.