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Open AccessArticle

Methyl Salicylate Increases Attraction and Function of Beneficial Arthropods in Cranberries

1
Escuela de Ciencias Agrícolas, Pecuarias y del Medio Ambiente (ECAPMA), Universidad Nacional Abierta y a Distancia (UNAD), Bogotá 110111, Colombia
2
Departamento de Entomologia, Universidade Federal de Lavras, Lavras 37200-000, Minas Gerais, Brasil
3
P.E. Marucci Center for Blueberry & Cranberry Research, Rutgers University, Chatsworth, NJ 08019, USA
*
Author to whom correspondence should be addressed.
Insects 2019, 10(12), 423; https://doi.org/10.3390/insects10120423
Received: 29 October 2019 / Revised: 16 November 2019 / Accepted: 18 November 2019 / Published: 25 November 2019
(This article belongs to the Special Issue Semiochemicals and Insect Behavior)
Methyl salicylate (MeSA) is an herbivore-induced plant volatile (HIPV) known to attract the natural enemies of herbivores in agro-ecosystems; however, whether this attraction leads to an increase in natural enemy functioning, i.e., predation, remains largely unknown. Here, we monitored for 2 years (2011–2012) the response of herbivores and natural enemies to MeSA lures (PredaLure) by using sticky and pitfall traps in cranberry bogs. In addition, European corn borer, Ostrinia nubilalis, egg masses were used to determine whether natural enemy attraction to MeSA leads to higher predation. In both years, MeSA increased adult hoverfly captures on sticky traps and augmented predation of O. nubilalis eggs. However, MeSA also attracted more phytophagous thrips and, in 2012, more plant bugs (Miridae) to sticky traps. Furthermore, we used surveillance cameras to record the identity of natural enemies attracted to MeSA and measure their predation rate. Video recordings showed that MeSA lures increase visitation by adult lady beetles, adult hoverflies, and predatory mites to sentinel eggs, and predation of these eggs doubled compared to no-lure controls. Our data indicate that MeSA lures increase predator attraction, resulting in increased predation; thus, we provide evidence that attraction to HIPVs can increase natural enemy functioning in an agro-ecosystem. View Full-Text
Keywords: Vaccinium macrocarpon; cranberries; HIPVs; natural enemies; predation; biological control Vaccinium macrocarpon; cranberries; HIPVs; natural enemies; predation; biological control
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Salamanca, J.; Souza, B.; Kyryczenko-Roth, V.; Rodriguez-Saona, C. Methyl Salicylate Increases Attraction and Function of Beneficial Arthropods in Cranberries. Insects 2019, 10, 423.

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