TY  - JOUR
TI  - Chemical composition and insecticidal potential of different Origanum spp. (Lamiaceae) essential oils against four stored product pests
AB  - This study was conducted to determine the contact and fumigant toxicity of plant essential oils extracted fromfour Origanum spp. against four stored product pests, Rhyzopertha dominica (F., 1792) (Coleoptera: Bostrichidae),Tribolium confusum Jacquelin Du Val, 1863 (Coleoptera: Tenebrionidae), Sitophilus granarius (L., 1875) and Sitophilusoryzae (L., 1763) (Coleoptera: Curculionidae). Chemical composition of the essential oils was determined using GCMS.The trials were conducted under laboratory conditions in 2019 at Plant Protection Central Research Institute.Essential oils extracted from Origanum onites L. and Origanum vulgare L. var. hirtum caused 100% mortality of R.dominica and T. confusum. The computed LD50 value for O. vulgare var. verticium against R. dominica 24 h afterapplication was 0.046 μl/insect. Single concentration fumigant study indicated that O. onites and O. vulgare var. hirtumessential oils cause high mortality (91 and 70%, respectively) of R. dominica within 24 h. Essential oils of O. vulgareshowed the highest activity against R. dominica with LC50 and LC90 values of 0.0052 and 0.0144 μl/ml, respectively.The main components of O. onites essential oil were thymol (22.9%), γ-terpinene (13.0%), p-cymene (12.9%) andcarvacrol (7.2%). Similarly, the essential oils of O. vulgare var. hirtum were composed of carvacrol (32.5%), thymol(16.1%), p-cymene (12.2%) and γ-terpinene (7.9%). Likewise, the essential oil of O. vulgare var. verticium had carvacrol(35.0%), p-cymene (11.6%), γ-terpinene (10.3%) and thymol (9.1%). Nonetheless, O. vulgare x O. onites essential oilhad carvacrol (15.2%), cis-sabinene hydrate (14.6%), terpinen-4-ol (14.6%) and γ-terpinene (8.7%).
AU  - ALKAN, BEYAZIT Mustafa
DO  - 10.16970/entoted.620387
PY  - 2020
JO  - Türkiye Entomoloji Dergisi
VL  - 44
IS  - 2
SN  - 1010-6960
SP  - 149
EP  - 163
DB  - TRDizin
UR  - http://search/yayin/detay/405445
ER  -