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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
30/05/2005 |
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Data da última atualização: |
10/05/2022 |
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Autoria: |
MORAES, M. C. B.; LAUMANN, R.; SUJII, E. R.; PIRES, C.; BORGES, M. |
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Título: |
Induced volatiles in soybean and pigeon pea plants artificially infested with the neotropical brown stink bug, Euchistus heros, and their effect on the egg parasitoid, Telenomus podisi. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Entomologia Experimentalis et Applicata, v. 115, n. 1, p. 227-237, 2005. |
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Idioma: |
Inglês |
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Conteúdo: |
Herbivory is known to increase the emission of volatiles, which attract natural enemies to herbivore-damaged plants in laboratory and agricultural systems. We report on signalling through volatiles induced by Euschistus heros (F.) (Heteroptera: Pentatomidae) in two legumes that influence the attraction and retention of the egg parasitoid Telenomus podisi (Ashmead) (Hymenoptera: Scelionidae). Air-borne extracts obtained from two host plants of E. heros, soybean, Glycine max, and pigeon pea, Cajanus cajan (Leguminosae), produce a different blend of emitted volatiles when attacked by adult males or females and nymphs of the pest species, compared with the undamaged plants. The same results were obtained when the plants were treated with extracted saliva of E. heros which had been mechanically introduced into the plants. This indicates that some substance in the saliva contributed to the release of the volatiles. Bioassays in a Y-tube olfactometer with female T. podisi and treated plants confirmed the significant preference of the egg parasitoid for plants attacked by either males, females, or fourth instar nymphs of the pest species. On the other hand, volatile extracts obtained from soybean subjected to the velvetbean caterpillar, Anticarsia gemmatalis, a non-host species for T. podisi, showed a different blend of volatiles compared to those obtained from plants subjected to E. heros. Additionally, the volatiles obtained from this planthost complex were not attractive to T. podisi. These results indicate that E. heros causes an increase in the emission of specific plant volatiles, and that the induction is possibly caused by an elicitor present in the pest saliva. The possibility that these plant volatiles play an important role in the attraction and retention of the egg parasitoid T. podisi is discussed. MenosHerbivory is known to increase the emission of volatiles, which attract natural enemies to herbivore-damaged plants in laboratory and agricultural systems. We report on signalling through volatiles induced by Euschistus heros (F.) (Heteroptera: Pentatomidae) in two legumes that influence the attraction and retention of the egg parasitoid Telenomus podisi (Ashmead) (Hymenoptera: Scelionidae). Air-borne extracts obtained from two host plants of E. heros, soybean, Glycine max, and pigeon pea, Cajanus cajan (Leguminosae), produce a different blend of emitted volatiles when attacked by adult males or females and nymphs of the pest species, compared with the undamaged plants. The same results were obtained when the plants were treated with extracted saliva of E. heros which had been mechanically introduced into the plants. This indicates that some substance in the saliva contributed to the release of the volatiles. Bioassays in a Y-tube olfactometer with female T. podisi and treated plants confirmed the significant preference of the egg parasitoid for plants attacked by either males, females, or fourth instar nymphs of the pest species. On the other hand, volatile extracts obtained from soybean subjected to the velvetbean caterpillar, Anticarsia gemmatalis, a non-host species for T. podisi, showed a different blend of volatiles compared to those obtained from plants subjected to E. heros. Additionally, the volatiles obtained from this planthost complex were not attractive to T. po... Mostrar Tudo |
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Palavras-Chave: |
Himenoptera. |
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Thesagro: |
Cajanus Cajan; Glycine Max; Guandu; Heteroptera; Soja. |
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Thesaurus NAL: |
Pentatomidae; Scelionidae. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02666naa a2200265 a 4500
001 1185687
005 2022-05-10
008 2005 bl uuuu u00u1 u #d
100 1 $aMORAES, M. C. B.
245 $aInduced volatiles in soybean and pigeon pea plants artificially infested with the neotropical brown stink bug, Euchistus heros, and their effect on the egg parasitoid, Telenomus podisi.$h[electronic resource]
260 $c2005
520 $aHerbivory is known to increase the emission of volatiles, which attract natural enemies to herbivore-damaged plants in laboratory and agricultural systems. We report on signalling through volatiles induced by Euschistus heros (F.) (Heteroptera: Pentatomidae) in two legumes that influence the attraction and retention of the egg parasitoid Telenomus podisi (Ashmead) (Hymenoptera: Scelionidae). Air-borne extracts obtained from two host plants of E. heros, soybean, Glycine max, and pigeon pea, Cajanus cajan (Leguminosae), produce a different blend of emitted volatiles when attacked by adult males or females and nymphs of the pest species, compared with the undamaged plants. The same results were obtained when the plants were treated with extracted saliva of E. heros which had been mechanically introduced into the plants. This indicates that some substance in the saliva contributed to the release of the volatiles. Bioassays in a Y-tube olfactometer with female T. podisi and treated plants confirmed the significant preference of the egg parasitoid for plants attacked by either males, females, or fourth instar nymphs of the pest species. On the other hand, volatile extracts obtained from soybean subjected to the velvetbean caterpillar, Anticarsia gemmatalis, a non-host species for T. podisi, showed a different blend of volatiles compared to those obtained from plants subjected to E. heros. Additionally, the volatiles obtained from this planthost complex were not attractive to T. podisi. These results indicate that E. heros causes an increase in the emission of specific plant volatiles, and that the induction is possibly caused by an elicitor present in the pest saliva. The possibility that these plant volatiles play an important role in the attraction and retention of the egg parasitoid T. podisi is discussed.
650 $aPentatomidae
650 $aScelionidae
650 $aCajanus Cajan
650 $aGlycine Max
650 $aGuandu
650 $aHeteroptera
650 $aSoja
653 $aHimenoptera
700 1 $aLAUMANN, R.
700 1 $aSUJII, E. R.
700 1 $aPIRES, C.
700 1 $aBORGES, M.
773 $tEntomologia Experimentalis et Applicata$gv. 115, n. 1, p. 227-237, 2005.
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