The Douglas-fir beetle (Dendroctonus pseudotsugae Hopk.) infests and kills Douglas-fir throughout most of its range in western United States, British Columbia and Mexico.
Occasionally western larch trees are infested when growing among Douglas-fir under attack. Attacks in standing larch are always unsuccessful, while those in freshly felled larch are usually successful and brood emergence is equivalent to that in Douglas-fir.
Douglas-fir beetles normally kill small groups of trees, but during outbreaks 100 tree groups are not uncommon. Losses can be devastating during periodic outbreaks, such as four that occurred in western Oregon and Washington from 1950 through 1969, during which 7.4 billion board feet of timber were killed. Outbreaks in standing trees range from 2 to 4 years. Those of longest duration coincide with periods of drought.
Douglas-fir beetle USFS FIDL #5 pdf
Wood Boring Insects of Trees & Shrubs
BaseLine Insecticide provides long lasting protection against Mountain Pine and other Bark Beetles.
Active Ingredients: Bifenthrin 23.4%Insecticide Mode of Action: 3 (Pyrethroids)EPA Signal Word: WARNING / AVISOApplication Rate Range: (see label) Container Size(s): 1 Qt., 1 Gal., 5 Gal.
Sevin SL Carbaryl Insecticide provides broad-spectrum control of more than 130 turf and ornamental pests. Active Ingredients: Carbaryl 43.0%Insecticide Mode of Action: 1A (Carbamates)EPA Signal Word: CAUTION / PRECAUCIONApplication Rate Range: (see label) Container Size(s): 2.5 Gal.
Carbaryl 4L Insecticide provides broad-spectrum control of more than 130 turf and ornamental pests.Active Ingredients: Carbaryl 43.0%Insecticide Mode of Action: 1A (Carbamates)EPA Signal Word: CAUTION / PRECAUCIONApplication Rate Range: (see label) Container Size(s): 2.5 Gal.
Synergy Shield MCH Bubble Caps, Douglas-fir Beetle Repellent uses MCH – a naturally occurring anti-aggregation pheromone of the Douglas-fir beetle to protect trees from attack by Spruce, and Douglas-fir beetles.Active Ingredients: 3-methyl-2-cyclohexen-1-one 97.9% (500 mg)EPA Signal Word: CAUTION / PRECAUCIONApplication Rate Range: 1 or 2 /tree, 40 /acre Container Size(s): Min. Order 10 pcs.
Treegator Original is a slow release watering bag that is perfect for newly planted or established trees from 1 to 8 inches in trunk diameter, with branches beginning at least 25 inches from the ground or higher.
Treegator Jr. Pro Slow Release Watering Bag for Evergreens, Trees & Shrubs. Professionally water any newly planted tree or shrub with a Treegator Jr. Pro Slow Release Watering Bag! Dual emitters continuously provides water over a 5 to 8 hour time period with no run-off. Brown color and low profile blends with existing landscape and reduces visibility while in use. Installs in minutes with no tools. Requires filling just 1 to 2 times per week. Just place, fill, and walk away! Sold Individually, Case Qty. = 12
AXXE Broad Spectrum Herbicide is a non-selective, weed control for grasses and broadleaf weeds. It is formulated to deliver maximum performance and provide fast-acting results on a long list of weeds and grasses, as well as most mosses and lichens. OMRI Listed.Sold Individually
Grandevo WDG Bioinsecticide Miticide is a new water dispersible granule formation that contains several active compounds that repel, stop feeding, reduce reproduction and induce mortality to prevent the development of damaging populations of sucking and chewing insects, flies and mites. OMRI Listed.Active Ingredients: Chromobacterium subtsugae strain PRAA4-1 30.0% Insecticide Mode of Action:Insecticide Class:EPA Signal Word: CAUTION / PRECAUCIONApplication Rate Range: (see label) Container Size(s): 20 Lbs.