| Title: | Lemon Terpenes Influence Behavior of the African Citrus Triozid Trioza erytreae (Hemiptera: Triozidae) |
| Author(s): | Antwi-Agyakwa AK; Fombong AT; Deletre E; Ekesi S; Yusuf AA; Pirk C; Torto B; |
| Address: | "International Centre of Insect Physiology and Ecology (icipe), Behavioural and Chemical Ecology Unit, P. O. Box 30772-00100, Nairobi, Kenya. Social Insects Research Group, Department of Zoology and Entomology, University of Pretoria, Private Bag X20, Hatfield, 0028, South Africa. CIRAD, UPR HORTSYS, F-34398, Montpellier, France. International Centre of Insect Physiology and Ecology (icipe), Behavioural and Chemical Ecology Unit, P. O. Box 30772-00100, Nairobi, Kenya. btorto@icipe.org. Social Insects Research Group, Department of Zoology and Entomology, University of Pretoria, Private Bag X20, Hatfield, 0028, South Africa. btorto@icipe.org" |
| DOI: | 10.1007/s10886-019-01123-y |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Linking) |
| Abstract: | "The African citrus triozid, Trioza erytreae Del Guercio (Hemiptera: Triozidae) is one of the primary vectors of the bacterium Candidatus Liberibacter spp. which causes citrus greening, a disease of global economic importance in citrus production. Despite its economic importance, little is known about its chemical ecology. Here, we used behavioral assays and chemical analysis to study the chemical basis of interaction between T. erytreae and one of its preferred host plants, Citrus jambhiri. In dual choice Y-tube olfactometer assays, lemon leaf odors attracted females but not males compared to plain air or solvent controls. However, in a petri dish arena assay, both sexes were arrested by lemon leaf odors. Coupled gas chromatography-mass spectrometry (GC/MS) analysis revealed quantitative differences in the odors of flushing and mature leaves, dominated by terpenes. Twenty-six terpenes were identified and quantified. In Petri dish arena assays, synthetic blends of the most abundant terpenes mimicking lemon flushing leaf odors elicited varying behavioral responses from both sexes of T. erytreae. A nine-component blend and a blend of the three most abundant terpenes; limonene, sabinene and beta-ocimene arrested both sexes of T. erytreae. In contrast, a six-component blend lacking in these three components elicited an avoidance response in both sexes. Furthermore, both sexes of T. erytreae preferred the three-component synthetic blend to lemon crude volatile extract. These results suggest that lemon terpenes might be used in the management of T. erytreae" |
| Keywords: | "Animals Behavior, Animal Citrus/*chemistry/parasitology Female Gas Chromatography-Mass Spectrometry/methods Hemiptera/*physiology Host Specificity Host-Parasite Interactions Insect Vectors Male Odorants Plant Diseases/microbiology Plant Extracts/*chemistr;" |
| Notes: | "MedlineAntwi-Agyakwa, Akua K Fombong, Ayuka T Deletre, Emilie Ekesi, Sunday Yusuf, Abdullahi A Pirk, Christian Torto, Baldwyn eng 2019/11/23 J Chem Ecol. 2019 Dec; 45(11-12):934-945. doi: 10.1007/s10886-019-01123-y. Epub 2019 Nov 21" |
