Effect of plant structure on host finding capacity of lepidopterous pests of crucifers by two Trichogramma parasitoids

Gingras, Daniel; Dutilleul, Pierre; Boivin, Guy

doi:10.1016/s1049-9644(02)00189-5

Cited by 47 publications

(36 citation statements)

References 35 publications

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“…In the literature, structural complexity is recorded as affecting herbivores (Raghu et al, 2004;Rudgers & Whitney, 2006) and parasitoids (Andow & Prokrym, 1990;Lukianchuk & Smith, 1997). In several studies, host finding success of parasitoids is higher on simple structured plants than on those with complex structures (Andow & Prokrym, 1990;Lukianchuk & Smith, 1997;Gingras et al, 2002Gingras et al, , 2003. Likewise, on large plants or in complex canopies herbivores are better able to escape predation, at least by some species of natural enemies (Heisswolf et al, 2005;Riihimäki et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Plant architecture and vegetation structure: Two ways for insect herbivores to escape parasitism

Obermaier¹,

Heisswolf²,

Poethke³

et al. 2008

Eur. J. Entomol.

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Abstract.Interactions between herbivorous insects and their parasitoids occur in highly structured and complex environments. Habitat structure can be an important factor affecting ecological interactions between different trophic levels. In this study the influence of plant architecture and surrounding vegetation structure on the interaction between the tansy leaf beetle, Galeruca tanaceti L. (Coleoptera: Chrysomelidae) and its egg parasitoid, Oomyzus galerucivorus Hedqvist (Hymenoptera: Eulophidae), was investigated at two small spatial scales in the field. It was expected that high and structurally complex plants or vegetation represent an enemy free space for the herbivore by making host search more difficult for the parasitoid. At the scale of individual plants, plant height had a positive influence on herbivore oviposition and egg clutch height a negative impact on parasitism. In addition, the beetle was more likely to oviposit on simple plants than on plants with branches, while the parasitoid remained unaffected by the degree of branching. At the microhabitat scale (r = 0.1 m around an oviposition site), both height and density of the vegetation affected beetle oviposition positively and egg parasitism negatively. The herbivore and its parasitoid, therefore, were influenced in opposite ways by habitat structure at both spatial scales investigated, suggesting the existence of an enemy free space for the herbivores' eggs on tall plants and in tall and complex vegetation. This study indicates that structural components of the environment are important for interactions among organisms of different trophic levels.

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Section: Discussionmentioning

confidence: 99%

Plant architecture and vegetation structure: Two ways for insect herbivores to escape parasitism

Obermaier¹,

Heisswolf²,

Poethke³

et al. 2008

Eur. J. Entomol.

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“…Isso ocorre porque a localização do hospedeiro é feita por caminhamento e por pequenos vôos na superfície a curtas distâncias, onde os ovos do hospedeiro estão depositados (ROMEIS et al, 2005). Assim, o desempenho de uma espécie de elevada potencialidade no controle de uma praga pode ser reduzido pelo primeiro nível trófico (VERKERK et al, 1998;GINGRAS et al, 2003). Acta Scientiarum.…”

Section: Resultsunclassified

“…A influência da planta hospedeira sobre o parasitismo de espécies de Trichogramma tem sido documentada em diversos estudos, nos quais há indícios de que podem ocorrer taxas de parasitismo diferenciadas dependendo da planta e da espécie de parasitóide (LUKIANCHUK; SMITH, 1997;GINGRAS et al, 2003;ROMEIS et al, 2005). Alguns Hymenoptera usam características como cor, formato, tamanho, odor e outras características para discriminar plantas (GUMBERT, 2000).…”

Section: Introdução Introdução Introdução Introduçãounclassified

Parasitismo de ovos de Heliothis virescens por Trichogramma spp. pode ser afetado por cultivares de algodão

Andrade¹,

Pratissoli

Torres

et al. 2009

Acta Sci. Agron.

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“…(foraging) dipengaruhi oleh kompleksitas struktur tanaman. Inang yang terdapat pada sttruktur tanaman yang sederhana lebih mudah ditemukan dibandingkan dengan inang pada struktur tanaman yang lebih kompleks (Gingras et al 2003). …”

Section: Pendahuluanunclassified

Keanekaragaman spesies parasitoid telur Helicoverpa armigera (Hübner) pada sistem tanam monokultur dan polikultur kapas

Nurindah¹,

Sujak²

2017

J Entomol Indones

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Polyculture system is one of techniques in pest management. In Indonesia, cotton is always intercropped with second food crops such as maize, soybean, mungbean or peanut. This research was aimed to evaluate the effect of culture system, i.e. cotton monoculture vs. cotton intercropped with soybean on the increase of species diversity of H. armigera egg parasitoids and the parasitoid contribution to mortality of H. armigera. The research was arranged in a split plot design with two main factors: three cotton varieties with three levels of trichome density (Tamcot SP 37, Kanesia 8 and LRA 5166) and the subplots were two cultivation systems (cotton monoculture and polyculture), with three replicates. Observations were made by collecting H. armigera eggs on population of first generation (45 days after planting) and second generation (75 DAP). The results showed that on cotton polyculture the egg parasitoid complex which consisted of Trichogramma spp. and Trichogrammatoidea spp. was higher than that in cotton monoculture and so was the egg parasitism level. The increase of egg parasitism was 24% in the first generation and 15% in the second generation. Parasitoid species found belonged to the genera Trichogramma and Trichogrammatoidea. In the parasitoid complex, Trichogrammatoidea armigera was dominant on the first generation and Trichogramma chilotraeae on the second. The domination succession could be as a result of the higher host-searching capacity of T. chilotraeae than that of T. armigera.

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Effect of plant structure on host finding capacity of lepidopterous pests of crucifers by two Trichogramma parasitoids

Cited by 47 publications

References 35 publications

Plant architecture and vegetation structure: Two ways for insect herbivores to escape parasitism

Plant architecture and vegetation structure: Two ways for insect herbivores to escape parasitism

Parasitismo de ovos de Heliothis virescens por Trichogramma spp. pode ser afetado por cultivares de algodão

Keanekaragaman spesies parasitoid telur Helicoverpa armigera (Hübner) pada sistem tanam monokultur dan polikultur kapas

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