Bioactivity of Chamaecyparis lawsoniana (A. Murray) Parl. and Thuja plicata Donn ex D. Don essential oils on Lymantria dispar (Linnaeus, 1758) (Lepidoptera: Erebidae) larvae and Phytophthora de Bary 1876 root pathogens

Gymnosperms of Idaho: Chemical Compositions and Enantiomeric Distributions of Essential Oils of Abies lasiocarpa, Picea engelmannii, Pinus contorta, Pseudotsuga menziesii, and Thuja plicata

“…The essential oils were dominated by α-thujone (72.5–77.8%) and β-thujone (5.2–8.2%), with notable quantities of sabinene (1.4–3.0%) and terpinene-4-ol (2.2–3.1%). The compositions observed are very similar to those previously reported by von Rudloff et al (both coastal and interior populations of western North America) [ 40 ], Nikolić et al (Serbia) [ 25 ], Tsiri et al (Poland) [ 23 ], and Lis et al (Poland) [ 24 ]. That is, the foliar essential oils of T. plicata , regardless of geographical location, have been dominated by α-thujone, with lesser amounts of β-thujone, sabinene, and terpinen-4-ol [ 40 ].…”

“…The foliar essential oil of T. plicata has shown insecticidal [ 42 ], insect antifeedant [ 25 ], as well as antibacterial and antifungal [ 25 , 43 ] activities. The biological activities of T. plicata essential oil can be attributed to the major component, α-thujone.…”

“…Thuja plicata Donn ex D. Don (western red cedar, Cupressaceae) is a large to very large evergreen tree native to western North America, ranging along the Cascade-Coastal Mountain Ranges from southeastern Alaska to northern California, and inland in the Rocky Mountains from British Columbia to the panhandle of northern Idaho ( Figure 9 ) [ 17 ]. Western red cedar is an important timber-producing tree and has been introduced to other temperate zone locations, including Europe, Great Britain, Australia, and New Zealand [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. The thin, gray-brown bark forms vertical bands of fissures; the branch termini form flat boughs with scale-like leaves; the cones are 10–18 mm long and 4–5 mm wide with overlapping scales ( Figure 10 ).…”

Biological Activities of Chamaecyparis lawsoniana (A.Murray bis) Parl. and Thuja plicata Donn ex D.Don Essential Oils: Toxicity, Genotoxicity, Antigenotoxicity, and Antimicrobial Activity

“…C. lawsoniana is mainly limited to the Pacific Coast, from southwestern Oregon to northwestern California, while T. plicata has a somewhat broader distribution along the Pacific Coast from southeastern Alaska to northwestern California as well as inland, along the Rocky Mountains from British Columbia to Idaho and Montana [5]. It is known that C. lawsoniana essential oil has been widely used in aromatherapy [6], and T. plicata essential oil is used to treat a variety of upper respiratory ailments and superficial wounds and as a natural insect repellent and wood preservative [7].…”

“…Some biological activities of C. lawsoniana essential oil (CLEO) and T. plicata essential oil (TPEO) have recently been published, with a primary focus on their antibacterial and antifungal activities [7][8][9][10][11][12]. In addition, the inhibitory effect of CLEO and TPEO was also reported against plant-damaging fungi, specifically Phytophthora [6]. Studies that seek alternatives to conventional antibiotics are invaluable in the post-antibiotic era, given the growing issue of (multi)resistance to these agents.…”