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Ulhoa, Lucas Adjuto; Barrigossi, José Alexandre Freitas; Borges, Miguel; Laumann, Raúl Alberto; Blassioli‐Moraes, Maria Carolina
Entomologia experimentalis et applicata, January 2020, 2020-01-00, 20200101, Letnik: 168, Številka: 1Journal Article
Tritrophic interactions mediated by semiochemicals have been intensively studied from the viewpoint of ecological relationships with Nearctic tritrophic organisms. However, there are few studies involving interactions with different herbivores on the same host plant in Neotropical systems. The objective of the current study was to investigate the effects of herbivory by two species of stink bugs (Heteroptera: Pentatomidae) with the same feeding habit – Tibraca limbativentris Stål and Glyphepomis spinosa Campos & Grazia – on indirect and direct defence strategies of rice plants. The responses of each stink bug species (virgin and mated females) and of their main natural enemy, the egg parasitoid Telenomus podisi Ashmead (Hymenoptera: Platygastridae; mated females), to volatiles from undamaged and herbivore‐damaged rice plants were evaluated using a Y‐tube olfactometer. The results showed that rice plants responded differently to T. limbativentris or G. spinosa herbivory, enhancing the production of a different blend of volatile compounds, which reduced the attraction for conspecific stink bugs and elicited the foraging behaviour of T. podisi. Rice plants responded differently to the herbivory damage provoked by Tibraca limbativentris or Glyphepomis spinosa (both Heteroptera: Pentatomidae), enhancing the production of different blends of volatile compounds, mainly monoterpenes and sesquiterpenes. In a Y‐tube olfactometer, the volatile blends reduced the attraction of conspecific stink bugs and stimulated the attraction of their main natural enemy, the egg parasitoid Telenomus podisi (Hymenoptera: Platygastridae).
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