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HERO ID
6970633
Reference Type
Journal Article
Title
Chemical composition and insecticidal potential of different Origanum spp. (Lamiaceae) essential oils against four stored product pests
Author(s)
Alkan, M; ,
Year
2020
Is Peer Reviewed?
0
Journal
Turkiye Entomoloji Dergisi
ISSN:
1010-6960
Publisher
ENTOMOLOGICAL SOC TURKEY, EGE UNIV
Location
BORNOVA IZMIR
Page Numbers
149-163
DOI
10.16970/entoted.620387
Web of Science Id
WOS:000529950700002
Abstract
This study was conducted to determine the contact and fumigant toxicity of plant essential oils extracted from four 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 Sitophilus olyzae (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 after application was 0.046 mu l/insect. Single concentration fumigant study indicated that O. onites and O. vulgare var. hirtum essential oils cause high mortality (91 and 70%, respectively) of R. dominica within 24 h. Essential oils of O. vulgare showed the highest activity against R. dominica with LC50 and LC90 values of 0.0052 and 0.0144 mu l/ml, respectively. The main components of O. onites essential oil were thymol (22.9%), gamma-terpinene (13.0%), gamma-cymene (12.9%) and carvacrol (7.2%). Similarly, the essential oils of 0. vulgare var. hirtum were composed of carvacrol (32.5%), thymol (16.1%), p-cymene (12.2%) and gamma-terpinene (7.9%). Likewise, the essential oil of O. vulgare var. verticium had carvacrol (35.0%), p-cymene (11.6%), gamma-terpinene (10.3%) and thymol (9.1%). Nonetheless, O. vulgate x O. onites essential oil had carvacrol (15.2%), cis-sabinene hydrate (14.6%), terpinen-4-ol (14.6%) and gamma-terpinene (8.7%).
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