Applied Entomology and Zoology (2014) 49, 249-253

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Kinuyo Yoneya, Soichi Kugimiya and Junji Takabayashi (2014)
Leaf beetle larvae, Plagiodera versicolora (Coleoptera: Chrysomelidae), show decreased performance on uninfested host plants exposed to airborne factors from plants infested by conspecific larvae
Applied Entomology and Zoology 49 (2), 249-253
Abstract: Undamaged plants are known to suffer less damage from herbivores when previously exposed to airborne factors from neighboring plants that are either infested or artificially damaged. However, to date, the effects of such a defensive phenomenon on performance of herbivorous insects have not been clearly shown. Here, we studied such effects in an interaction between a willow plant, Salix eriocarpa Franchet et Savatier (Salicales: Salicaceae), and a specialist leaf beetle, Plagiodera versicolora (Laicharting) (Coleoptera: Chrysomelidae). In a wind tunnel, uninfested willow plants were placed downwind of willow plants infested by leaf beetle larvae for 4 days. As a control, we placed uninfested plants downwind of uninfested plants in the tunnel. After exposure, downwind plants were served to leaf beetle larvae. Pupal weight, larval survival rates, and the leaf area consumed by larvae all decreased significantly, and larval developmental duration increased significantly, when larvae fed on willow plants downwind of infested plants were compared with those downwind of uninfested plants. These results showed that airborne factors from infested willow plants negatively affected the performance of leaf beetle larvae. Further studies are needed to identify the active factor(s) from the infested willow plants affecting the performance of leaf beetle larvae.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
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Database assignments for author(s): Junji Takabayashi

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.
Plagiodera versicolora Willow (Salix) Japan