Influence of Helicoverpa Armigera (Hübner) Diet on Its Parasitoid Campoletis Chlorideae Uchida

Murugan, Kadarkarai; Kumar, Nikhil; Jeyabalan, D.; Senthil-Nathan, Sengottayan; Sivaramakrishnan, S.; Swamiappan, M.

doi:10.1017/s1742758400017793

Cited by 7 publications

(9 citation statements)

References 30 publications

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“…Parasitic wasps are particularly sensitive to changes in the nutritional quality of their hosts, as host-parasitoid relationships are usually quite intricate (Godfray, 1994). Sublethal effects of Bt proteins on the host larvae (sick host) may reduce their nutritional quality for the parasitoid, and poor nutritional quality of the host results in detrimental effects on the development and survival of the natural enemies (Nordlund et al, 1988;Murugan et al, 2000). This can be due to a poor host quality or due to reduction in host population (which is the goal of the Bt crops).…”

Section: Discussionmentioning

confidence: 99%

“…This can be due to a poor host quality or due to reduction in host population (which is the goal of the Bt crops). Sublethal effects of Bt proteins on the host larvae (sick host) may reduce their nutritional quality for the parasitoid, and poor nutritional quality of the host results in detrimental effects on the development and survival of the natural enemies (Nordlund et al, 1988;Murugan et al, 2000). However, these prey quality-mediated effects are less likely for predators (Romeis et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

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Effects of Bacillus thuringiensisδ‐endotoxin‐fed Helicoverpa armigera on the survival and development of the parasitoid Campoletis chlorideae

Sharma¹,

Dhillon

Arora

2007

Entomologia Exp Applicata

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With the deployment of transgenic crops expressing δ‐endotoxins from Bacillus thuringiensis (Bt) for pest management, there is a need to generate information on the interaction of crop pests with their natural enemies that are important for regulation of pest populations. Therefore, we studied the effects of the Bt δ‐endotoxins Cry1Ab and Cry1Ac on the survival and development of the parasitoid Campoletis chlorideae Uchida (Hymenoptera: Ichneumonidae) reared on Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larvae fed on Bt toxin‐intoxicated artificial diet. The H. armigera larvae fed on artificial diet impregnated with Cry1Ab and Cry1Ac at LC50 (effective concentration to kill 50% of the neonate H. armigera larvae) and ED50 (effective concentration to cause a 50% reduction in larval weight) levels before and after parasitization resulted in a significant reduction in cocoon formation and adult emergence of C. chlorideae. Larval period of the parasitoid was prolonged by 2 days when fed on Bt‐intoxicated larvae. No adverse effects were observed on female fecundity. The observed effects appeared to be indirect in nature, because no Bt proteins were detected through enzyme‐linked immunosorbent assay in the C. chlorideae larvae, cocoons, or adults fed on Cry1Ab‐ or Cry1Ac‐treated H. armigera larvae. The effects of Bt toxin proteins on C. chlorideae were due to early mortality of H. armigera larvae, that is, before completion of parasitoid larval development.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effects of Bacillus thuringiensisδ‐endotoxin‐fed Helicoverpa armigera on the survival and development of the parasitoid Campoletis chlorideae

Sharma¹,

Dhillon

Arora

2007

Entomologia Exp Applicata

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“…This along with the fact that C. chlorideae can be reared in the laboratory and is relatively well studied (e.g. Nikam and Gaikwad, 1991;Murugan et al, 2000) makes it a possible candidate for risk assessment studies. Only a few predatory arthropods are reported from chickpea (Mehto et al, 1986;Singh et al, 1990) (Fig.…”

Section: Possible Effects Of Insect-resistant Gm Chickpeas On Entomopmentioning

confidence: 99%

The potential of transgenic chickpeas for pest control and possible effects on non-target arthropods

Romeis

Sharma

et al. 2004

Crop Protection

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Chickpea, Cicer arietinum, is the third most important grain legume crop in the world, with India being the largest producer. Insect pests are a major constraint to chickpea production. In India, the legume pod borer Helicoverpa armigera is the major insect pest of chickpeas. However, sap-sucking insects that act as vectors for viral diseases and bruchid beetles in storage are also considered important pests. Here we give an overview over the different management options to control these pests. There is a growing interest in the genetic modification of crops to enhance their resistance against insect pests. Here we present the state-of-theart of chickpea transformation and give an overview on the available insecticidal genes that could be deployed to increase insect resistance in chickpea. Prior to commercialization, transgenic crops have to be assessed for their effects on the environment including the possible impact on non-target arthropods, many of which are important for biological pest control. Therefore, the arthropod-food web in the Indian chickpea system is described. Possible routes through which entomophagous insects could be exposed to insecticidal proteins expressed by genetically modified chickpeas are discussed, and species that could be selected for prerelease risk assessment are recommended.

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“…Sublethal doses of Bt toxins may also reduce the nutritional quality of the insect host, which has been shown to result in negative effects on the development and survival of some natural enemies (Nordlund et al. 1988; Murugan et al. 2000).…”

Section: Discussionmentioning

confidence: 99%

Chickpea‐mediated effects of Bacillus thuringiensis on Helicoverpa armigera and its larval parasitoid, Campoletis chlorideae

Dhillon

Sharma

2010

J Applied Entomology

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Efforts are underway to express toxin genes from Bacillus thuringiensis (Bt) in chickpea for controlling the pod borer, Helicoverpa armigera. The interaction between Bt toxins, Helicoverpa‐resistant chickpeas, and the parasitoid, Campoletis chlorideae are not fully understood. Therefore, we studied tritrophic interactions between Bt (administered as spray), chickpea genotypes, and the parasitoid, C. chlorideae. Chickpea genotypes resistant to H. armigera exercised a significant reduction in leaf feeding, survival and development of H. armigera, but did not influence the development and survival of the parasitoid, C. chlorideae. Bt sprays on different chickpea genotypes prolonged the larval period, and reduced pupation and adult emergence of C. chlorideae. Weights of H. armigera larvae showed a strong and positive association with C. chlorideae larval period on Bt treated, and a negative association on untreated chickpeas. The Bt‐intoxicated H. armigera larvae also resulted in reduced weight of the cocoons and adults of C. chlorideae, suggesting significant influence of host size on development and survival of the parasitoid. Bt toxins were detected in H. armigera larvae fed on Bt‐sprayed chickpeas, but not in C. chlorideae reared on H. armigera larvae fed on Bt‐treated chickpeas, and in the parasitoid adults fed on honey intoxicated with 0.05%Bt. The adverse effects of Bt on the parasitoid were largely through early mortality of H. armigera larvae or poor quality of the host. This information would be useful for planning appropriate strategies for testing and deployment of Bt‐transgenic chickpea with resistance to H. armigera for sustainable crop production.

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Influence of Helicoverpa Armigera (Hübner) Diet on Its Parasitoid Campoletis Chlorideae Uchida

Cited by 7 publications

References 30 publications

Effects of Bacillus thuringiensisδ‐endotoxin‐fed Helicoverpa armigera on the survival and development of the parasitoid Campoletis chlorideae

Effects of Bacillus thuringiensisδ‐endotoxin‐fed Helicoverpa armigera on the survival and development of the parasitoid Campoletis chlorideae

The potential of transgenic chickpeas for pest control and possible effects on non-target arthropods

Chickpea‐mediated effects of Bacillus thuringiensis on Helicoverpa armigera and its larval parasitoid, Campoletis chlorideae

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