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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
28/04/2017 |
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Data da última atualização: |
28/04/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
THANIKKUL, P.; PIYASAENGTHONG, N.; NETTO, A. C. M.; TAYLOR, D.; KAINOH, Y. |
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Título: |
Effects of quantitative and qualitative differences in volatiles from host- and non-host-infested maize on the attraction of the larval parasitoid Cotesia kariyai. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Entomologia Experimentalis et Applicata, Netherlands, v. , n. , p. 1-10, 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
Cotesia kariyai Watanabe (Hymenoptera: Braconidae) is a specialist larval parasitoid of Mythimna separata Walker (Lepidoptera: Noctuidae). Cotesia kariyai wasps use herbivore-induced plant volatiles (HIPVs) to locate hosts. However, complex natural habitats are full of volatiles released by both herbivorous host- and non-host-infested plants at various levels of intensity. Therefore, the presence of non-hosts may affect parasitoid decisions while foraging. Here, the host-finding efficiency of naive C. kariyai from HIPVs influenced by host- and non-host-infested maize [Zea mays L. (Poaceae)] plants was investigated with a four-arm olfactometer. Ostrinia furnacalis Guenee (Lepidoptera: Crambidae) was selected as a non-host species. One unit (1 U) of host- or non-host-infested plant was prepared by infesting a potted plant with five host or seven non-host larvae. In two-choice bioassays, host-infested plants fed upon by different numbers of larvae, and various units of host- and
non-host-infested plants (infestation units; 1 U, 2 U, and 3 U) were arranged to examine the effects of differences in volatile quantity and quality on the olfactory responses of C. kariyai with the
assumption that volatile quantity and quality changes with differences in numbers of insects and plants. Cotesia kariyai was found to perceive quantitative differences in volatiles from host-infested
plants, preferring larger quantities of volatiles from larger numbers of larvae or plants. Also, the parasitoids discriminated between healthy plants, host-infested plants, and non-host-infested plants by
recognising volatiles released from those plants. Cotesia kariyai showed a reduced preference for host-induced volatiles, when larger numbers of non-host-infested plants were present. Therefore,
quantitative and qualitative differences in volatiles from host- and non-host-infested plants appear to affect the decision ofC. kariyai during host-habitat searching in multiple tritrophic systems. MenosCotesia kariyai Watanabe (Hymenoptera: Braconidae) is a specialist larval parasitoid of Mythimna separata Walker (Lepidoptera: Noctuidae). Cotesia kariyai wasps use herbivore-induced plant volatiles (HIPVs) to locate hosts. However, complex natural habitats are full of volatiles released by both herbivorous host- and non-host-infested plants at various levels of intensity. Therefore, the presence of non-hosts may affect parasitoid decisions while foraging. Here, the host-finding efficiency of naive C. kariyai from HIPVs influenced by host- and non-host-infested maize [Zea mays L. (Poaceae)] plants was investigated with a four-arm olfactometer. Ostrinia furnacalis Guenee (Lepidoptera: Crambidae) was selected as a non-host species. One unit (1 U) of host- or non-host-infested plant was prepared by infesting a potted plant with five host or seven non-host larvae. In two-choice bioassays, host-infested plants fed upon by different numbers of larvae, and various units of host- and
non-host-infested plants (infestation units; 1 U, 2 U, and 3 U) were arranged to examine the effects of differences in volatile quantity and quality on the olfactory responses of C. kariyai with the
assumption that volatile quantity and quality changes with differences in numbers of insects and plants. Cotesia kariyai was found to perceive quantitative differences in volatiles from host-infested
plants, preferring larger quantities of volatiles from larger numbers of larvae or plants. Also, the parasito... Mostrar Tudo |
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Palavras-Chave: |
complexhabitat; Crambidae; herbivore-induced plant volatiles; host-searching efficiency; infochemicals; Lepidoptera; Mythimna separata; Noctuidae; Ostrinia furnacalis; tritrophic interactions. |
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Categoria do assunto: |
O Insetos e Entomologia |
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Marc: |
LEADER 02940naa a2200289 a 4500
001 1126179
005 2017-04-28
008 2017 bl uuuu u00u1 u #d
100 1 $aTHANIKKUL, P.
245 $aEffects of quantitative and qualitative differences in volatiles from host- and non-host-infested maize on the attraction of the larval parasitoid Cotesia kariyai.$h[electronic resource]
260 $c2017
520 $aCotesia kariyai Watanabe (Hymenoptera: Braconidae) is a specialist larval parasitoid of Mythimna separata Walker (Lepidoptera: Noctuidae). Cotesia kariyai wasps use herbivore-induced plant volatiles (HIPVs) to locate hosts. However, complex natural habitats are full of volatiles released by both herbivorous host- and non-host-infested plants at various levels of intensity. Therefore, the presence of non-hosts may affect parasitoid decisions while foraging. Here, the host-finding efficiency of naive C. kariyai from HIPVs influenced by host- and non-host-infested maize [Zea mays L. (Poaceae)] plants was investigated with a four-arm olfactometer. Ostrinia furnacalis Guenee (Lepidoptera: Crambidae) was selected as a non-host species. One unit (1 U) of host- or non-host-infested plant was prepared by infesting a potted plant with five host or seven non-host larvae. In two-choice bioassays, host-infested plants fed upon by different numbers of larvae, and various units of host- and non-host-infested plants (infestation units; 1 U, 2 U, and 3 U) were arranged to examine the effects of differences in volatile quantity and quality on the olfactory responses of C. kariyai with the assumption that volatile quantity and quality changes with differences in numbers of insects and plants. Cotesia kariyai was found to perceive quantitative differences in volatiles from host-infested plants, preferring larger quantities of volatiles from larger numbers of larvae or plants. Also, the parasitoids discriminated between healthy plants, host-infested plants, and non-host-infested plants by recognising volatiles released from those plants. Cotesia kariyai showed a reduced preference for host-induced volatiles, when larger numbers of non-host-infested plants were present. Therefore, quantitative and qualitative differences in volatiles from host- and non-host-infested plants appear to affect the decision ofC. kariyai during host-habitat searching in multiple tritrophic systems.
653 $acomplexhabitat
653 $aCrambidae
653 $aherbivore-induced plant volatiles
653 $ahost-searching efficiency
653 $ainfochemicals
653 $aLepidoptera
653 $aMythimna separata
653 $aNoctuidae
653 $aOstrinia furnacalis
653 $atritrophic interactions
700 1 $aPIYASAENGTHONG, N.
700 1 $aNETTO, A. C. M.
700 1 $aTAYLOR, D.
700 1 $aKAINOH, Y.
773 $tEntomologia Experimentalis et Applicata, Netherlands$gv. , n. , p. 1-10, 2017.
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