Effect of gossypol on survival and reproduction of the zoophytophagous stinkbug Podisus nigrispinus (Dallas)

Evangelista, Wescley Viana; Santos, Renato Lemos dos; Torres, Jorge B.; Zanúncio, José Cola

doi:10.1590/s0085-56262011005000003

Cited by 11 publications

(7 citation statements)

References 32 publications

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“…This lack of a linear relation between gossypol dose and parasitoid longevity cannot be explained by parasitoid deterrence at high gossypol concentrations because no such deterrence was evident in our gustatory response experiment. A similar lack of a linear dose-response was detected with female spined soldier bugs Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae) [46]. The results of earlier tri-trophic studies were mixed.…”

Section: Discussionmentioning

confidence: 75%

Aphid Honeydew Quality as a Food Source for Parasitoids Is Maintained in Bt Cotton

2014

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Bt-transgenic cotton has proven to be highly efficient in controlling key lepidopteran pests. One concern with the deployment of Bt cotton varieties is the potential proliferation of non-target pests. We previously showed that Bt cotton contained lower concentrations of insecticidal terpenoids as a result of reduced caterpillar damage, which benefited the aphid Aphis gossypii. It is thus important that non-target herbivores are under biological control in Bt cotton fields. The induction or lack of induction of terpenoids could also influence the quality of aphid honeydew, an important food source for beneficial insects. We therefore screened A. gossypii honeydew for cotton terpenoids, that are induced by caterpillars but not the aphids. We then tested the influence of induced insect-resistance of cotton on honeydew nutritional quality for the aphid parasitoid Lysiphlebus testaceipes and the whitefly parasitoid Eretmocerus eremicus. We detected the cotton terpenoids gossypol and hemigossypolone in A. gossypii honeydew. Although a feeding assay demonstrated that gossypol reduced the longevity of both parasitoid species in a non-linear, dose-dependent manner, the honeydew was capable of sustaining parasitoid longevity and reproduction. The level of caterpillar damage to Bt and non-Bt cotton had no impact on the quality of honeydew for the parasitoids.These results indicate that the nutritional quality of honeydew is maintained in Bt cotton and is not influenced by induced insect resistance.

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Section: Discussionmentioning

confidence: 75%

Aphid Honeydew Quality as a Food Source for Parasitoids Is Maintained in Bt Cotton

2014

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“…When cotton plants were infested with H. virescens caterpillars, natural plant defence was activated, which was evidenced by the elevated terpenoid concentrations in leaf samples. Terpenoids are known to be toxic to a wide range of insect orders including Diptera 13 , 26 – 31 . Terpenoid concentrations in newly developed leaves more than doubled following caterpillar feeding on the lower leaves compared with uninfested plants.…”

Section: Discussionmentioning

confidence: 99%

Effects of purified or plant-produced Cry proteins on Drosophila melanogaster (Diptera: Drosophilidae) larvae

Haller

Romeis

Meissle

2017

Sci Rep

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Although genetically engineered crops producing insecticidal Cry proteins from Bacillus thuringiensis (Bt) are grown worldwide, few studies cover effects of Bt crops or Cry proteins on dipteran species in an agricultural context. We tested the toxicity of six purified Cry proteins and of Bt cotton and Bt maize tissue on Drosophila melanogaster (Diptera: Drosophilidae) as a surrogate for decomposing Diptera. ELISA confirmed the presence of Cry proteins in plant material, artificial diet, and fly larvae, and concentrations were estimated. Median concentrations in emerging adult flies were below the limit of detection. Bioactivity of purified Cry proteins in the diet was confirmed by sensitive species assays using Heliothis virescens (Lepidoptera: Noctuidae). Purified Cry1Ab, Cry1Ac, Cry1B, Cry1C, Cry1F, or Cry2Aa, or leaf material from stacked Bt cotton (Bollgard II producing Cry1Ac and Cry2Ab) or Bt maize (SmartStax producing Cry1A.105, Cry1Fa2, Cry2Ab2, Cry3Bb1, Cry34Ab1 and Cry35Ab1) had no consistent effects on D. melanogaster survival, developmental time, adult body mass or morphometrics. However, D. melanogaster showed longer developmental time and smaller wing size when fed with cotton leaves from plants infested with H. virescens caterpillars compared to flies fed with leaves from uninfested plants, while no such effects were obvious for maize.

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“…Of course insects develop resistance against toxicants, and herbivores are more prone to developing resistance to plant defenses due to natural selection than predatory or parasitoid insects, which are natural enemies of pests [ 54 , 55 ]. The alkaloids present in the bodies of pests may negatively affect their predators [ 56 , 57 ], and this phenomenon may seriously disturb biological control and influence IPM strategies. Therefore, detailed research on any new pesticidal substance must be carried out to test effects on non-target fauna.…”

Section: Solanaceae Secondary Metabolitesmentioning

confidence: 99%

A Review of Bioinsecticidal Activity of Solanaceae Alkaloids

Chowański

Adamski

Marciniak

et al. 2016

Toxins

223

138

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Only a small percentage of insect species are pests. However, pest species cause significant losses in agricultural and forest crops, and many are vectors of diseases. Currently, many scientists are focused on developing new tools to control insect populations, including secondary plant metabolites, e.g., alkaloids, glycoalkaloids, terpenoids, organic acids and alcohols, which show promise for use in plant protection. These compounds can affect insects at all levels of biological organization, but their action generally disturbs cellular and physiological processes, e.g., by altering redox balance, hormonal regulation, neuronal signalization or reproduction in exposed individuals. Secondary plant metabolites cause toxic effects that can be observed at both lethal and sublethal levels, but the most important effect is repellence. Plants from the Solanaceae family, which contains numerous economically and ecologically important species, produce various substances that affect insects belonging to most orders, particularly herbivorous insects and other pests. Many compounds possess insecticidal properties, but they are also classified as molluscides, acaricides, nematocides, fungicides and bactericides. In this paper, we present data on the sublethal and lethal toxicity caused by pure metabolites and crude extracts obtained from Solanaceae plants. Pure substances as well as water and/or alcohol extracts cause lethal and sublethal effects in insects, which is important from the economical point of view. We discuss the results of our study and their relevance to plant protection and management.

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Effect of gossypol on survival and reproduction of the zoophytophagous stinkbug Podisus nigrispinus (Dallas)

Cited by 11 publications

References 32 publications

Aphid Honeydew Quality as a Food Source for Parasitoids Is Maintained in Bt Cotton

Aphid Honeydew Quality as a Food Source for Parasitoids Is Maintained in Bt Cotton

Effects of purified or plant-produced Cry proteins on Drosophila melanogaster (Diptera: Drosophilidae) larvae

A Review of Bioinsecticidal Activity of Solanaceae Alkaloids

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