| Title: | Attraction of Three Mirid Predators to Tomato Infested by Both the Tomato Leaf Mining Moth Tuta absoluta and the Whitefly Bemisia tabaci |
| Author(s): | Silva DB; Bueno VHP; Van Loon JJA; Penaflor M; Bento JMS; Van Lenteren JC; |
| Address: | "Department of Entomology, Federal University of Lavras (UFLA), P.O.Box 3037, Lavras, MG, 37200-000, Brazil. Luiz de Queiroz College of Agriculture (USP/ESALQ), Department of Entomology and Acarology, University of Sao Paulo, P.O. Box 9, Piracicaba, SP, 13418-900, Brazil. Department of Entomology, Federal University of Lavras (UFLA), P.O.Box 3037, Lavras, MG, 37200-000, Brazil. vhpbueno@den.ufla.br. Luiz de Queiroz College of Agriculture (USP/ESALQ), Department of Entomology and Acarology, University of Sao Paulo, P.O. Box 9, Piracicaba, SP, 13418-900, Brazil. vhpbueno@den.ufla.br. Laboratory of Entomology, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands" |
| DOI: | 10.1007/s10886-017-0909-x |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Linking) |
| Abstract: | "Plants emit volatile compounds in response to insect herbivory, which may play multiple roles as defensive compounds and mediators of interactions with other plants, microorganisms and animals. Herbivore-induced plant volatiles (HIPVs) may act as indirect plant defenses by attracting natural enemies of the attacking herbivore. We report here the first evidence of the attraction of three Neotropical mirid predators (Macrolophus basicornis, Engytatus varians and Campyloneuropsis infumatus) toward plants emitting volatiles induced upon feeding by two tomato pests, the leaf miner Tuta absoluta and the phloem feeder Bemisia tabaci, in olfactometer bioassays. Subsequently, we compared the composition of volatile blends emitted by insect-infested tomato plants by collecting headspace samples and analyzing them with GC-FID and GC-MS. Egg deposition by T. absoluta did not make tomato plants more attractive to the mirid predators than uninfested tomato plants. Macrolophus basicornis is attracted to tomato plants infested with either T. absoluta larvae or by a mixture of B. tabaci eggs, nymphs and adults. Engytatus varians and C. infumatus responded to volatile blends released by tomato plants infested with T. absoluta larvae over uninfested plants. Also, multiple herbivory by T. absoluta and B. tabaci did not increase the attraction of the mirids compared to infestation with T. absoluta alone. Terpenoids represented the most important class of compounds in the volatile blends and there were significant differences between the volatile blends emitted by tomato plants in response to attack by T. absoluta, B. tabaci, or by both insects. We, therefore, conclude that all three mirids use tomato plant volatiles to find T. absoluta larvae. Multiple herbivory did neither increase, nor decrease attraction of C. infumatus, E. varians and M. basicornis. By breeding for higher rates of emission of selected terpenes, increased attractiveness of tomato plants to natural enemies may improve the effectiveness of biological control" |
| Keywords: | Animals Female Gas Chromatography-Mass Spectrometry Heteroptera/growth & development/*physiology Larva/drug effects/physiology Solanum lycopersicum/*chemistry/metabolism Moths/growth & development/*physiology Nymph/drug effects/physiology Plant Leaves/che; |
| Notes: | "MedlineSilva, Diego B Bueno, Vanda H P Van Loon, Joop J A Penaflor, Maria Fernanda G V Bento, Jose Mauricio S Van Lenteren, Joop C eng Project CAPES/NUFFIC 044-12/Coordenation for Improvement of Higher Education Personnel (CAPES, Brazil)/ CNPQ Process 573761/2008-6 and FAPESPE Process 2008/57701-2/The National Institute of Science and Technology (INCT) Semiochemicals in Agriculture/ 2017/11/28 J Chem Ecol. 2018 Jan; 44(1):29-39. doi: 10.1007/s10886-017-0909-x. Epub 2017 Nov 25" |
