Combined effects of allelochemical‐fed and scarce prey on the generalist insect predator <i>Podisus</i><i>maculiventris</i>

Bozer, Stephen; Traugott, M.; Stamp, Nancy E.

doi:10.1046/j.1365-2311.1996.00011.x

Cited by 25 publications

(22 citation statements)

References 11 publications

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“…The effect of allelochemical-containing prey on insect predators may be greater when prey are scarce. For example, allelochemical-fed prey had no adverse effect on growth of an insect predator when prey were plentiful, whereas when prey were scarce, allelochemical-fed prey increased the negative effects of prey scarcity on predator growth (Bozer et al 1996;Weiser and Stamp 1998). The ability to handle plant chemical defenses may reflect the availability of nutrients (Duffey 1980;Slansky and Wheeler 1992).…”

Section: Introductionmentioning

confidence: 99%

Enemy-free space via host plant chemistry and dispersion: assessing the influence of tri-trophic interactions

Stamp

2001

Oecologia

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It has been argued that generalist natural enemies of insect herbivores provide a major selection pressure for restricted host plant range. This idea is a subset of the enemy-free space (EFS) hypothesis, whereby insect herbivores escape their enemies by being scarce in space and time and/or chemically defended via containing plant allelochemicals. To date, there are only two complete tests of EFS via host plant chemistry and two via host plant dispersion, and only two of these tests support the EFS hypothesis. However, three corollaries to existing views on EFS are sufficiently supported by data to warrant direct testing of the view that EFS is obtained via host plant chemistry's effects on enemies of insect herbivores. So the issue remains. Resolution will require a more collaborative, methodological approach to examine the relative importance of the major multiple factors that shape patterns of feeding specialization of insect herbivores. Predation is certainly one of these factors, but its role is still not clear.

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Section: Introductionmentioning

confidence: 99%

Enemy-free space via host plant chemistry and dispersion: assessing the influence of tri-trophic interactions

Stamp

2001

Oecologia

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“…Since predatory bugs can also feed on plants (Stoner, 1970;Moreira et al, 1996Moreira et al, /1997, this behavior can affect their development through the ingestion of deleterious substances from resistant plants (Price et al, 1980;Bozer et al, 1996;Traugott & Stamp, 1997). As a consequence, adult longevity of this bug may be shorter and their fecundity and predation capacity could be lower on resistant plants.…”

Section: Introductionmentioning

confidence: 99%

Reproductive characteristics of the predator Podisus nigrispinus fed with an insect resistant soybean variety

Neto

Zanúncio

Picanço

et al. 2002

Pesq. agropec. bras.

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The objective of this research was to evaluate the effect of the insect resistant soybean genotype IAC 17 on reproductive characteristics of Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) females compared to the soybean insect susceptible genotype UFV 16. Treatments were: T1) females of P. nigrispinus fed on plants of the UFV 16 and Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) caterpillars reared on leaves of this variety; T2) females of P. nigrispinus fed on plants of the IAC 17 and A. gemmatalis caterpillars reared on leaves of this variety. Longevity of females, pre-oviposition, oviposition and pos-oviposition periods, number of eggs and egg masses/ female, egg weight, interval between egg mass laying, number of eggs/egg mass, percentage of nymphs, number of nymphs/female and total number of prey killed/female of P. nigrispinus were evaluated. Most of the characteristics evaluated showed similar results between treatments, but the oviposition period was longer for females reared on the resistant genotype than on the susceptible one and the percentage of total females that laid eggs was lower on the IAC 17. Also, the resistant genotype caused higher mortality of P. nigrispinus females at the beginning of its adult stage and egg production by females of this predator was better spread along its adult stage with this resistant genotype. On the other hand, results suggest no effect of the resistant genotype on the offspring of this predator.Index terms: Anticarsia gemmatalis, insects, reproduction, biological control, pest control. Características reprodutivas do predador Podisus nigrispinus alimentado com variedade de soja resistente a insetosResumo O objetivo desta pesquisa foi avaliar o efeito do genótipo IAC 17, resistente a insetos, nas características reprodutivas de fêmeas de Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae), utilizando o genótipo susceptível UFV 16 como controle. Os tratamentos foram: T1) fêmeas de P. nigrispinus alimentadas com plantas de UFV 16 e lagartas de Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae), criadas em folhas desta cultivar; T2) fêmeas de P. nigrispinus alimentadas com plantas de IAC 17, e lagartas de A. gemmatalis, criadas em folhas desta cultivar. Avaliou-se a longevidade das fêmeas, períodos de pré-oviposição, oviposição e pós-oviposição, número de ovos e de posturas/fêmea, peso dos ovos, intervalo entre posturas, número de ovos/postura, porcentagem de ovos eclodidos, número de ninfas/fêmea e número total de presas mortas/fêmea de P. nigrispinus. A maioria das características avaliadas mostrou resultados semelhantes entre tratamentos, exceto o período de oviposição, que foi mais longo para fêmeas criadas no genótipo resistente que no susceptí-vel, e a porcentagem de fêmeas que ovipositaram antes de morrer, que foi menor na IAC 17. Além disso, o genótipo IAC 17 causou maior mortalidade de fêmeas de P. nigrispinus no início de sua fase adulta e distribuição mais uniforme da produção de ovos ao longo do período adulto desse predado...

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“…In this study, prey were plentiful. In another study when M. sexta prey were plentiful, moderate levels of these allelochemicals had no effect on stink bug performance, but when prey were scarce, the allelochemicals reduced stink bug growth rate (Bozer et al 1996). Such results are likely to have consequences for stink bug fitness: amount of food consumed and body size positively influence fecundity of stink bugs (, Wiedenmann and O’Neil 1990).…”

Section: Discussionmentioning

confidence: 99%

“…We reported RGR and RCR because these are standard, general measurements of insect performance (Scriber and Slansky 1981, Slansky and Scriber 1985); growth rate is a composite statistic used in fundamental issues of ecology and evolution and consumption rate describes response to prey over time. We reported ECI, or gross efficiency, because it gives insight into underlying physiological mechanisms (Slansky and Scriber 1985) and previously we found strong allelochemical effects on ECI of stink bugs (Bozer et al 1996). A conversion factor to estimate the initial dry mass of the nymphs was determined by weighing 20 newly molted fourth‐instar nymphs and, after drying at 55°C, reweighing them.…”

Section: Methodsmentioning

confidence: 99%

Response of an Insect Predator to Prey Fed Multiple Allelochemicals Under Representative Thermal Regimes

Stamp

Yang

Osier

1997

Ecology

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We examined the effects of three allelochemicals found in tomato (chlorogenic acid, rutin, and tomatine) and two thermal regimes (21°:10°C and 26°:15°C, representing spring and summer, respectively) on the performance of a generalist insect predator (Podisus maculiventris: Pentatomidae) fed prey containing those allelochemicals. The prey were Manduca sexta (Sphingidae) caterpillars, Solanaceae specialists with a preference for tomato. Whether an allelochemical had a negative, neutral, or positive effect on developmental time or mass gained by the predators depended on thermal regime and the combination of allelochemicals in the prey’s diet. The effects of multiple allelochemicals were not always additive. For the most part, the allelochemicals had greater negative effects at the warmer thermal regime. Effects of allelochemicals also depended on the stage of the predator. Individually, chlorogenic acid and rutin prolonged developmental time of second‐instar nymphs. In contrast, only rutin and tomatine together affected developmental time of fourth‐instar nymphs, and this combination of allelochemicals reduced developmental time. Tomatine substantially reduced mass gained by second‐instar nymphs but had no effect on mass gained by fourth‐instar nymphs. Rutin and tomatine together had no effect on second‐instar nymphs but increased the mass of fourth‐instar nymphs. There were no allelochemical by temperature interactions for second‐instar nymphs, whereas allelochemical by temperature interactions influenced stadium duration, final dry mass, and relative growth rate of fourth‐instar nymphs. Rutin and tomatine together eliminated the negative effect of chlorogenic acid on consumption of prey by the fourth‐instar nymphs. Chlorogenic acid by itself and rutin and tomatine together increased the efficiency of conversion of ingested prey to nymphal biomass. Comparison with an earlier study revealed that the effects of these thermal and dietary conditions were distinctly different for prey and predators, which suggests that such conditions would promote developmental asynchrony between prey and predator populations.

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Combined effects of allelochemical‐fed and scarce prey on the generalist insect predator Podisusmaculiventris

Cited by 25 publications

References 11 publications

Enemy-free space via host plant chemistry and dispersion: assessing the influence of tri-trophic interactions

Enemy-free space via host plant chemistry and dispersion: assessing the influence of tri-trophic interactions

Reproductive characteristics of the predator Podisus nigrispinus fed with an insect resistant soybean variety

Response of an Insect Predator to Prey Fed Multiple Allelochemicals Under Representative Thermal Regimes

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