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Recruiting on the Spot: A Biodegradable Formulation for Lacewings to Trigger Biological Control of Aphids

1
Department of Plant Protection Biology, Swedish University of Agricultural Science, 230 53 Alnarp, Sweden
2
NIBIO, Norwegian Institute of Bioeconomy Research, Postbox 115, NO-1431 Ås, Norway
3
Isca Technologies Inc., 1230 Spring St., Riverside, CA 92507, USA
*
Author to whom correspondence should be addressed.
Shared First Authorship.
Current address: Corporación Colombiana de Investigación Agropecuaria (Agrosavia), C. I. La Libertad, Vía Puerto López km 17, Meta, Colombia
Insects 2019, 10(1), 6; https://doi.org/10.3390/insects10010006
Received: 28 November 2018 / Revised: 25 December 2018 / Accepted: 29 December 2018 / Published: 5 January 2019
(This article belongs to the Special Issue Pest Control in Fruit Trees)
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Abstract

Upon herbivory, plants release herbivore-induced plant volatiles (HIPVs), which induce chemical defenses in the plant as well as recruit natural enemies. However, whether synthetic HIPVs can be employed to enhance biological control in a cultivated crop in the field is yet to be explored. Here we show that a biodegradable formulation loaded with induced and food-signaling volatiles can selectively recruit the common green lacewing, Chrysoperla carnea, and reduce pest population under field conditions. In apple orchards, the new formulation attracted lacewing adults over a 4-week period, which correlated well with independent assessments of the longevity of the slow-release matrix measured through chemical analyses. In barley, lacewing eggs and larvae were significantly more abundant in treated plots, whereas a significant reduction of two aphid species was measured (98.9% and 93.6% of population reduction, for Sitobion avenae and Rhopalosiphum padi, respectively). Results show the potential for semiochemical-based targeted recruitment of lacewings to enhance biological control of aphids in a field setting. Further research should enhance selective recruitment by rewarding attracted natural enemies and by optimizing the application technique. View Full-Text
Keywords: apple; barley; Chrysoperla carnea; herbivory induced plant volatiles; integrated pest management; semiochemicals; ecological intensification apple; barley; Chrysoperla carnea; herbivory induced plant volatiles; integrated pest management; semiochemicals; ecological intensification
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Pålsson, J.; Thöming, G.; Silva, R.; Porcel, M.; Dekker, T.; Tasin, M. Recruiting on the Spot: A Biodegradable Formulation for Lacewings to Trigger Biological Control of Aphids. Insects 2019, 10, 6.

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