| Title: | "Terpenes from herbivore-induced tomato plant volatiles attract Nesidiocoris tenuis (Hemiptera: Miridae), a predator of major tomato pests" |
| Author(s): | Ayelo PM; Yusuf AA; Pirk CW; Chailleux A; Mohamed SA; Deletre E; |
| Address: | "International Centre of Insect Physiology and Ecology, Nairobi, Kenya. Department of Zoology and Entomology, University of Pretoria, Hatfield, South Africa. UPR HORTSYS, University of Montpellier, CIRAD, Montpellier, France. Biopass2, Cirad-IRD-ISRA-UGB - Centre de cooperation internationale en recherche agronomique pour le developpement, Institut de Recherche pour le Developpement-Institut Senegalais de Recherches Agricoles, Universite Gaston Berger, Dakar, Senegal" |
| ISSN/ISBN: | 1526-4998 (Electronic) 1526-498X (Linking) |
| Abstract: | "BACKGROUND: Biological control plays a key role in reducing crop damage by Tuta absoluta (Meyrick) and Trialeurodes vaporariorum (Westwood), which cause huge yield losses in tomato (Solanum lycopersicum L.). The mirid predator Nesidiocoris tenuis (Reuter) preys heavily on these pests, with satisfying control levels in tomato greenhouses. Although N. tenuis is known to be attracted to volatiles of tomato plants infested by T. absoluta and whitefly, little is known about the specific attractive compounds and the effect of prey density on the predator response. RESULTS: Y-tube olfactometer bioassays revealed that the attraction of N. tenuis to tomato volatiles was positively correlated with the density of T. absoluta infestation, unlike T. vaporariorum infestation. The predator was also attracted to volatiles of T. absoluta larval frass, but not to T. vaporariorum honeydew or T. absoluta sex pheromone. Among the herbivore-induced plant volatiles (HIPVs) that characterised the attractive plants infested with 20 T. absoluta larvae, olfactometer bioassays revealed that N. tenuis is attracted to the monoterpenes alpha-pinene, alpha-phellandrene, 3-carene, beta-phellandrene and beta-ocimene, whereas (E)-beta-caryophyllene was found to repel the predator. In dose-response bioassays, the five-component blend of the attractants elicited a relatively low attraction in the predator, and removal of beta-phellandrene from the blend enhanced the attraction of the predator to the resulting four-component blend, suggesting synergism among four monoterpenes. CONCLUSION: These findings suggest that a four-component blend of alpha-pinene, alpha-phellandrene, 3-carene and beta-ocimene could be used as a kairomone-based lure to recruit the predator for the biological control of T. absoluta and T. vaporariorum" |
| Keywords: | Animals *Hemiptera Herbivory *Heteroptera *Solanum lycopersicum Terpenes *Volatile Organic Compounds/pharmacology HIPVs biological control kairomones leafminer Tuta absoluta whitefly Trialeurodes vaporariorum; |
| Notes: | "MedlineAyelo, Pascal M Yusuf, Abdullahi A Pirk, Christian Ww Chailleux, Anais Mohamed, Samira A Deletre, Emilie eng Agence Nationale de la Recherche/ 91672680/University of Pretoria and the German Academic Exchange Service/ Kenyan Government/ Federal Democratic Republic of Ethiopia/ Swiss Agency for Development and Cooperation/ Swedish International Development Cooperation Agency/ Foreign, Commonwealth & Development Office/ RDYR180504326262/Y-rated Researchers/ 109380/IFRR/ CPRR160502163617/University of Pretoria and the National Research Foundation/ ANR-16-CE32-0010-01/French National Research Agency (ANR)/ England 2021/07/27 Pest Manag Sci. 2021 Nov; 77(11):5255-5267. doi: 10.1002/ps.6568. Epub 2021 Aug 7" |
