Oviposition and reproductive performance of a generalist parasitoid (Trichogramma pretiosum) exposed to host species that differ in their physical characteristics

Brotodjojo, R.R. Rukmowati; Walter, Gimme H.

doi:10.1016/j.biocontrol.2006.08.011

Cited by 40 publications

(17 citation statements)

References 46 publications

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“…The difference in the effect of humidity on parasitism in the two hosts may be because of the physiological differences between them; as the factitious host is able to develop in a low humidity environment (15%; Cox et al 1981), the eggs have a low water content, and an increase in humidity in this environment might be required for the proper development of the parasitoid. However, features like host egg volume, chorion thickness, nutritional content, age, and the shape of the host egg masses can affect the ability of the host egg to maintain its humidity, which affects parasitism and the sex ratio (Hoffmann et al 2001, Roriz et al 2006, Rukmowati-Brotodjojo and Walter 2006. With respect to sex ratio, it is important to highlight that this is an important biological parameter when considering massrearing for use in biological control programs (Bueno et al 2008).…”

Section: Discussionmentioning

confidence: 99%

The Importance of Relative Humidity for Telenomus remus (Hymenoptera: Platygastridae) Parasitism and Development on Corcyra cephalonica (Lepidoptera: Pyralidae) and Spodoptera frugiperda (Lepidoptera: Noctuidae) Eggs

Pomari-Fernandes

Queiroz

Bueno

et al. 2014

Annals of the Entomological Society of America

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The rearing of Telenomus remus (Nixon 1937) has been limited due to the difficulty of its development in its natural host, the eggs of Spodoptera frugiperda (J.E. Smith). Environmental conditions can strongly affect egg's parasitoid rearing on factitious hosts; however, until now only the effects of temperature have been studied. The importance of relative humidity in T. remus parasitism is poorly understood; therefore, this study evaluated its parasitism on Corcyra cephalonica (Stainton, 1866) and S. frugiperda eggs under different humidity regimes. Lifetime parasitism and parasitism viability were higher on S. frugiperda eggs and did not differ among humidity regimes. However, these biological parameters were higher at 80% humidity than at both 40 and 60% humidity when T. remus was reared on C. cephalonica eggs. The sex ratio was always higher than 0.6 for all hosts and humidity regimes. Parental female longevity was only influenced by humidity when presented to C. cephalonica eggs: it was higher at 60 and 80% humidity. T. remus egg-to-adult period was longer in C. cephalonica eggs; however, no difference between humidity regimes was noted. In general, relative humidity affected T. remus development only when it was reared on C. cephalonica eggs. For this factitious host, 80% humidity was shown to be appropriate for egg parasitoid rearing due to its better biological performance.

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Section: Discussionmentioning

confidence: 99%

The Importance of Relative Humidity for Telenomus remus (Hymenoptera: Platygastridae) Parasitism and Development on Corcyra cephalonica (Lepidoptera: Pyralidae) and Spodoptera frugiperda (Lepidoptera: Noctuidae) Eggs

Pomari-Fernandes

Queiroz

Bueno

et al. 2014

Annals of the Entomological Society of America

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“…To succeed and ensure the develop ment of their offspring, parasitoids must be able to perceive chemical cues from a plant that has been attacked by an herbivore, and, when finding it, assess its phys iological conditions (age, size, absence of pathogens) and, if selected, manipulate the number of eggs to be deposited. Therefore, it is essential that parasitoids have an efficient sensory apparatus that will guide them in the search, localization, ac ceptance, and manipulation of their hosts (Ceballo & Walter, 2004;Ha et al, 2006;Rukmowati Brotodjojo & Walter, 2006;Gullan & Cranston, 2008;Obonyo et al, 2008;Xiaoyi & Zhongqi, 2008;Silva-Torres et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Parasitoid-host interaction: sensory structures involved in the parasitism behavior of Bracon vulgaris (Hymenoptera: Braconidae)

et al. 2014

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Parasitoids have evolved mechanisms to evade their hosts' defenses. Bracon vulgaris (Ashmead) is a larval ectoparasitoid responsible for natural reduction of Anthonomus grandis (Boheman) and Pectinophora gossypiella (Saunders), which are considered the main cotton pests in the cotton agro ecosystem in northeastern Brazil. This study aimed to analyze the sensory structures (antennae and ovipositor) involved in the parasitism behavior of B. vulgaris, and to describe and evaluate associations between composition, morphology, and functions of these structures in the parasitoid-host interaction. Results showed that the B. vulgaris ovipositor is a multifunctional structure of 2.7 ± 0.3 mm in length composed of 3 valves. Valves 1 and 2 are elongated, rigid, and act jointly to pierce the host's cuti cle, to inject the poison glands secretion, and to deposit eggs. Valve 3 covers the other valves, giving them protection. Valve 3 also presents annulations in all its extension, which gives flexibility to the ovipositor, and trichoid sensilla that possibly capture vibrations from the host's feeding and loco motion, thereby aiding the parasite in the host selection. The presence of cuticular microtrichia was possibly responsible for the cleaning of the ovipositor, keeping it functional between the various inser tions that occur during the parasitism behavior. The parasitoid's antennae are filliform-like, measure about 2 mm, and are composed of four types of sensilla (trichoids, basiconical, coeloconical, and pla codes) that act as olfactory and gustatory receptors and/or express tactile, thermo,-and hygroreception functions. The integrated action of these sensory components corroborates the successful parasitism behavior of the parasitoid B. vulgaris.

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“…No entanto, até mesmo para um parasitóide polífago, a adequabilidade destes hospedeiros alternativos pode ser variável. Características como volume do ovo hospedeiro, espessura do córion, conteúdo nutricional, idade e forma de postura dos hospedeiros podem afetar a qualidade dos parasitóides, bem como a porcentagem de parasitismo, razão sexual e o número de parasitóides/ ovo do hospedeiro (Hoffmann et al 2001;Roriz et al 2006;Rukmowati-Brotodjojo & Walter 2006). Desta forma, o desempenho do parasitóide está relacionado à qualidade do hospedeiro (Bai et al 1992;Schmidt 1994), sendo a escolha do hospedeiro de criação de suma importância na etapa de criação em laboratório, pois a escolha inadequada poderá comprometer o programa de controle biológico.…”

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Tabela de vida de fertilidade de três espécies neotropicais de Trichogrammatidae em ovos de hospedeiros alternativos como critério de seleção hospedeira

Dias¹,

Parra²,

Dias³

2010

Rev. Bras. entomol.

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Oviposition and reproductive performance of a generalist parasitoid (Trichogramma pretiosum) exposed to host species that differ in their physical characteristics

Cited by 40 publications

References 46 publications

The Importance of Relative Humidity for Telenomus remus (Hymenoptera: Platygastridae) Parasitism and Development on Corcyra cephalonica (Lepidoptera: Pyralidae) and Spodoptera frugiperda (Lepidoptera: Noctuidae) Eggs

The Importance of Relative Humidity for Telenomus remus (Hymenoptera: Platygastridae) Parasitism and Development on Corcyra cephalonica (Lepidoptera: Pyralidae) and Spodoptera frugiperda (Lepidoptera: Noctuidae) Eggs

Parasitoid-host interaction: sensory structures involved in the parasitism behavior of Bracon vulgaris (Hymenoptera: Braconidae)

Tabela de vida de fertilidade de três espécies neotropicais de Trichogrammatidae em ovos de hospedeiros alternativos como critério de seleção hospedeira

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