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11 October 2019 Footprints and Ootheca of Lycorma delicatula Influence Host-Searching and -Acceptance of the Egg-Parasitoid Anastatus orientalis
Robert Malek, Joe M. Kaser, Hannah J. Broadley, Juli Gould, Marco Ciolli, Gianfranco Anfora, Kim A. Hoelmer
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Abstract

The spotted lanternfly, Lycorma delicatula White (1845) (Hemiptera: Fulgoridae), is an invasive insect that was first reported in North America in Berks County, Pennsylvania, in 2014. It is a polyphagous phloem feeder that attacks over 70 plant species, threatening the agricultural, lumber, and ornamental industries of North America. Infestations of the pest have been reported in several U.S. counties, and a lack of endemic predators and parasitoids feeding on L. delicatula suggests a release from natural enemies in the invaded range. An egg-parasitoid Anastatus orientalis (Hymenoptera: Eupelmidae) was reported attacking L. delicatula at high rates in its native range and may play a key role in reducing its populations there. To better understand the foraging behavior of A. orientalis, a series of behavioral experiments were conducted to determine successful parasitism and behavioral responses to traces left by adult L. delicatula and to the oothecae which cover their eggs. Our results suggest that wasps detected chemical traces left by L. delicatula adults while walking on surfaces and exhibited a strong arrestment response. Moreover, wasps preferred to oviposit in egg masses with intact oothecae. The implications of these findings are herein discussed with regard to the exploitation of host kairomones by foraging wasps, as well as to its ability to overcome host structural defenses.

Published by Oxford University Press on behalf of Entomological Society of America 2019. This work is written by (a) US Government employee(s) and is in the public domain in the US.
Robert Malek, Joe M. Kaser, Hannah J. Broadley, Juli Gould, Marco Ciolli, Gianfranco Anfora, and Kim A. Hoelmer "Footprints and Ootheca of Lycorma delicatula Influence Host-Searching and -Acceptance of the Egg-Parasitoid Anastatus orientalis," Environmental Entomology 48(6), 1270-1276, (11 October 2019). https://doi.org/10.1093/ee/nvz110
Received: 24 May 2019; Accepted: 20 August 2019; Published: 11 October 2019
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KEYWORDS
foraging behavior
Fulgoridae
host–parasitoid interaction
invasive species
Spotted Lanternfly
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