| Title: | Methyl benzoate exhibits insecticidal and repellent activities against Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) |
| Author(s): | Mostafiz MM; Jhan PK; Shim JK; Lee KY; |
| Address: | "Division of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University, Daegu, Republic of Korea. Institute of Plant Medicine, Kyungpook National University, Daegu, Republic of Korea. Institute of Agricultural Science and Technology, Kyungpook National University, Daegu, Republic of Korea. Sustainable Agriculture Research Center, Kyungpook National University, Gunwi, Republic of Korea" |
| DOI: | 10.1371/journal.pone.0208552 |
| ISSN/ISBN: | 1932-6203 (Electronic) 1932-6203 (Linking) |
| Abstract: | "Methyl benzoate (MB) is a plant-derived volatile organic compound with insecticidal properties, but such activity has not been evaluated against the sweetpotato whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae), a major crop pest. In this study, we tested methyl benzoate control efficacy on B. tabaci infecting tomato plants in a greenhouse, specifically measuring contact and fumigant toxicity, as well as repellent activity. For direct spray applications of 0% (control), 0.1%, 0.25%, 0.5%, 1%, 2% MB onto tomato leaves infested with adults of B. tabaci (< 5-d-old), 2% MB showed the highest corrected mortality (100%) at 24 h post-treatment. For residual toxicity in which the same MB solutions were sprayed onto tomato leaves and allowed to dry for 2 h before < 5-d-old adults were released, the 2% MB also showed the highest corrected mortality (100%) at 48 h post-treatment. The lethal median concentration (LC50) for eggs, fourth-instar nymphs, and adults were 0.3%, 0.2%, and 0.2%, respectively. In pot culture experiments, 1% MB concentration was found more effective at killing nymphs and preventing adult eclosion than all other concentrations, and gave 100 percent population reduction compared with the control. MB repelled adult whiteflies and caused 96.5% fumigant toxicity within 10 h post-treatment. Repellency and anti-oviposition rates against B. tabaci had median effective doses of 0.24% and 0.16%, respectively. Our results suggest that MB has strong potential as an environmentally friendly biopesticide for control of B. tabaci but field trials and further greenhouse studies are required to establish efficacy under more natural conditions" |
| Keywords: | Animals Benzoates/chemistry/*pharmacology Hemiptera/*drug effects/growth & development Insect Repellents/chemistry Insecticides/chemistry Lethal Dose 50 Solanum lycopersicum/parasitology Nymph/drug effects/growth & development Plant Leaves/parasitology; |
| Notes: | "MedlineMostafiz, Mohammad Munir Jhan, Pijush Kanti Shim, Jae-Kyoung Lee, Kyeong-Yeoll eng Research Support, Non-U.S. Gov't 2018/12/05 PLoS One. 2018 Dec 4; 13(12):e0208552. doi: 10.1371/journal.pone.0208552. eCollection 2018" |
