Environmental Entomology (1997) 26, 446-454

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C.D. Pilcher, J.J. Obrycki, M.E. Rice and L.C. Lewis (1997)
Preimaginal development, survival, and field abundance of insect predators on transgenic Bacillus thuringiensis corn
Environmental Entomology 26 (2), 446-454
Abstract: Laboratory studies determined the effects of feeding corn, Zea mays L., pollen expressing a Cry1Ab protein derived from Bacillus thuringiensis (Berliner) subsp. kurstaki on 3 predatory species: Coleomegilla maculata DeGeer (Coleoptera: Coccinellidae), Orius insidiosus Say (Heteroptera: Anthocoridae), and Chrysoperla carnea Stephens (Neuroptera: Chrysopidae). No acute detrimental effects of the transgenic B. thuringiensis pollen (Cry1Ab protein) on preimaginal development and survival were observed among these predators. The following percentage survival values (±SE) were observed: C. maculata, 89 ± 2.2% (B. thuringiensis corn pollen), 69 ± 5.9% (non-B. thuringiensis corn pollen); O. insidiosus, 63 ± 12% (B. thuringiensis corn pollen), 44 ± 10.2% (non-B. thuringiensis corn pollen); and C. carnea, 49 ± 3.5% (B. thuringiensis and non-B. thuringiensis corn pollen). No detrimental effects were observed in the abundance of Ostrinia nubilalis (Hübner) (Lepidoptera: Pyralidae) predators (coccinellids, anthocorids, chrysopids) in B. thuringiensis corn compared with non-B. thuringiensis corn during 2 yr of field evaluations. Predator numbers observed before, during, and after pollen shed suggest that B. thuringiensis corn pollen will not affect natural enemy movement in corn. Additional studies are needed to test for chronic and reproductive effects over several generations before concluding that transgenic B. thuringiensis corn pollen has no effect on insect predators.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: English)
Link to article at publishers website
Database assignments for author(s): José Ramón Diaz-Ruiz, Leslie C. Lewis, Anthony C. Bellotti

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
surveys/sampling/distribution
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Ostrinia nubilalis Maize/corn (Zea mays)
Bacillus thuringiensis var. kurstaki (entomopathogen) Ostrinia nubilalis Maize/corn (Zea mays)
Chrysoperla carnea (predator)
Coleomegilla maculata (predator)
Orius insidiosus (predator)