Journal of Pest Science (2019) 92, 723-736

Mirian F.F. Michereff, Diego M. Magalhães, Marla J. Hassemer, Raúl A. Laumann, Jing-Jiang Zhou, Paulo E. de A. Ribeiro, Paulo A. Viana, Paulo E. de O. Guimarães, Pedro H.C. Schimmelpfeng, Miguel Borges, John A. Pickett, Michael A. Birkett and Maria Carolina Blassioli-Moraes (2019)
Variability in herbivore-induced defence signalling across different maize genotypes impacts significantly on natural enemy foraging behaviour
Journal of Pest Science 92 (2), 723-736
Abstract: 'Smart' plants that release volatile defence compounds in response to pest damage, and which recruit beneficial natural enemies, offer an opportunity for exploiting biological control in future crop protection strategies. Using six maize genotypes, Zapalote Chico ('landrace'), Mirt2A, Sintético Spodoptera (SS), L3, and two commercial hybrids BRS 4103 and BRS 1040, the aim of this work was to evaluate maize responses to larval damage from the fall armyworm Spodoptera frugiperda, a major maize pest in Brazil, and the ability of the egg parasitoid Telenomus remus to respond to HIPVs induced by S. frugiperda damage. Y-tube olfactometer bioassays with T. remus showed preferential responses to the S. frugiperda-induced volatiles of SS and BRS 4103 compared to constitutive volatiles of the same genotypes, but to none of the other genotypes tested. Chemical analysis of maize volatile extracts showed that SS produced more volatile compounds in response to S. frugiperda damage, followed by BRS 4103. In addition, higher levels of mono, homo-, or sesquiterpenes, together with green leaf volatiles (GLVs) were the most attractive blend for T. remus; however, there was no attraction when only GLVs were produced in higher levels. In summary, these results show that volatile defence signalling produced by maize plants due to S. frugiperda damage varies significantly depending on maize genotype and this variability influences T. remus foraging behaviour.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Raúl Alberto Laumann, Miguel Borges, John A. Pickett, Michael A. Birkett, Maria Carolina Blassioli-Moraes

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Spodoptera frugiperda	Maize/corn (Zea mays)
Telenomus remus (parasitoid)	Spodoptera frugiperda	Maize/corn (Zea mays)