Insecticidal effects of some essential oils against Tribolium confusum (du Val.) and Acanthoscelides obtectus (Say), (Co
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ORIGINAL RESEARCH ARTICLE
Insecticidal effects of some essential oils against Tribolium confusum (du Val.) and Acanthoscelides obtectus (Say), (Coleoptera: Tenebrionidae and Bruchidae) adults Temel Gokturk 1 & Saban Kordali 2 & Kibar Ak 3 & Memis Kesdek 4 & Ayse Usanmaz Bozhuyuk 5 Received: 22 October 2019 / Accepted: 15 January 2020 # African Association of Insect Scientists 2020
Abstract In this study, insecticidal effects of the essential oils obtained from plants Ocimum basilicum L., Rosmarinus officinalis L. and Artemisia dracunculus L. on confused flour beetle (Tribolium confusum du Val., 1863 (Coleoptera: Tenebrionidae)) and bean weevil (Acanthoscelides obtectus (Say), 1831 (Coleoptera: Bruchidae)) adults were tested in laboratory conditions. In this context, T. confusum and A. obtectus adults were exposed to essential oils at 10 and 20 μL/petri doses for 24, 48, 72 and 96 h. All of the essential oils used in the study caused mortalities at different rates in two application doses but end of the 96 h all mortality rates were obtained similar (O. basilicum 98.3%, R. officinalis 98.3%, A. dracunculus 93.3% against T. confusum adults; O. basilicum 100%, R. officinalis 100%, A. dracunculus 100% against A. obtectus adults). It was determined that the effects of essential oils on A. obtectus adults were greater than T. confusum adults. Especially when the dosage was 20 μL, the death rate increased up to over 95% after 96 h for all types. The mortality rates increased with increasing exposure period at the 48, 72 and 96 h. in all applications. The results of the study suggest that essential oils from O.basilicum and R.officinalis could have a potential as control agents against A. obtectus and T.confusum adults under storage conditions. Keywords Tribolium confusum . Acanthoscelides obtectus . Essential oil . Insecticidal effect
Introduction Quantitative and qualitative losses appear in stored products that are attacked by microorganisms, rodents, mites, birds and insects (Franzolin et al. 1999). It has been estimated that the economic losses caused by stored anti-crop agents vary between 1,25–2,5 billion Dollars in the United States of America (Flinn et al. 2007). There are more than 600 bugs insects that
* Temel Gokturk [email protected] 1
Forest Faculty, Department of Forest Engineering, Artvin Çoruh University, Artvin, Turkey
2
Faculty of Agriculture, Department of Plant Protection, Muğla Sıtkı Koçman University, Muğla, Turkey
3
Black Sea Agricultural Research Institute, Samsun, Turkey
4
Fethiye Ali Sıtkı Mefharet Kocman Vocation Hidh School, Muğla Sıtkı Koçman University, Muğla, Turkey
5
Faculty of Agriculture, Department of Plant Protection, Igdır University, Igdır, Turkey
harm the stored agricultural products. These insects lead to damages approximately between 10% and 40% on the stored agricultural products in the World (Tripathi et al. 2001). Tribolium confusum (du Val., 1863) (Coleoptera: Tenebrionidae) and Acanthoscelides obtectus (Say, 1831) (Coleoptera: Bruchidae) are two important p
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