Effects of post-harvest management practices on the degradation of Bacillus thuringiensis proteins in genetically modified corn residue

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dc.contributor.advisorHooks, Cerruti RRen_US
dc.contributor.authorJohnson, Veronicaen_US
dc.contributor.departmentEntomologyen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2018-09-07T05:45:35Z
dc.date.available2018-09-07T05:45:35Z
dc.date.issued2018en_US
dc.description.abstractMost studies addressing the ecological effects of Bt crops have focused on non-target effects during the crop growing cycle. Less information is available on the fate of expressed toxins in crop residue after harvest in a no-till production system. This research investigated the effects of four post-harvest management practices on the degradation rates of Cry proteins expressed in SmartStax field corn. Cry protein degradation expressed as growth inhibition of Ostrinia nubilalis larvae after harvest was measured by a feeding bioassay, and enzyme-linked immunosorbent assays were used to detect the presence of Cry proteins. Cry proteins retained significant levels of biological activity at crop senescence and were still present in corn residue for more than 20 weeks after harvest. Despite inconsistencies in treatment effects, the study demonstrated that post-harvest practices that increase soil-residue contact increase protein degradation, thereby reducing the period of exposure for non-target organisms.en_US
dc.identifierhttps://doi.org/10.13016/M23J3946N
dc.identifier.urihttp://hdl.handle.net/1903/21175
dc.language.isoenen_US
dc.subject.pqcontrolledEntomologyen_US
dc.subject.pqcontrolledAgricultureen_US
dc.subject.pquncontrolledBten_US
dc.subject.pquncontrolledCry proteinen_US
dc.subject.pquncontrolledGenetically modified cornen_US
dc.subject.pquncontrolledPost-harvest residueen_US
dc.subject.pquncontrolledProtein degradationen_US
dc.titleEffects of post-harvest management practices on the degradation of Bacillus thuringiensis proteins in genetically modified corn residueen_US
dc.typeThesisen_US

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