2009
DOI: 10.2134/agronj2009.0297
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Stacked Corn Hybrids Show Inconsistent Yield and Economic Responses in New York

Abstract: Stacked (two to three transgenic traits) corn (Zea mays L.) hybrids represented 40% of U.S. corn in 2008, despite limited agronomic studies. Field‐scale studies were conducted on four farms in New York for 2 yr to evaluate the agronomics and economics of double‐stacked {glyphosate resistance and Bt (Bacillus thuringiensis) European corn borer [Ostrinia nubilalis (Hübner)] trait} hybrids when following soybean [Glycine Max (L.) Merr.], as well as triple‐stacked [additional Bt corn rootworm (Diabrotica spp.) tra… Show more

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Cited by 14 publications
(10 citation statements)
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“…Although Bt hybrids produced higher yields than non‐ Bt hybrids at 11 locations, the higher‐priced transgenic hybrids only returned significantly greater profits at one of these sites. This result emphasizes that yield increases associated with Bt traits do not consistently translate into greater net profits, especially when the higher‐priced hybrids targeting both ECB and CRW are used on rotated fields for ECB control, as is common now in the northeast . Grain moisture levels among Bt and non‐ Bt hybrids were similar (Bohnenblust EW, unpublished data), indicating that differences in drying costs were negligible, in contrast to previous work .…”
Section: Discussionmentioning
confidence: 69%
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“…Although Bt hybrids produced higher yields than non‐ Bt hybrids at 11 locations, the higher‐priced transgenic hybrids only returned significantly greater profits at one of these sites. This result emphasizes that yield increases associated with Bt traits do not consistently translate into greater net profits, especially when the higher‐priced hybrids targeting both ECB and CRW are used on rotated fields for ECB control, as is common now in the northeast . Grain moisture levels among Bt and non‐ Bt hybrids were similar (Bohnenblust EW, unpublished data), indicating that differences in drying costs were negligible, in contrast to previous work .…”
Section: Discussionmentioning
confidence: 69%
“…This result emphasizes that yield increases associated with Bt traits do not consistently translate into greater net profits, especially when the higher-priced hybrids targeting both ECB and CRW are used on rotated fields for ECB control, as is common now in the northeast. 29 Grain moisture levels among Bt and non-Bt hybrids were similar (Bohnenblust EW, unpublished data), indicating that differences in drying costs were negligible, in contrast to previous work. 5,29 To maximize profits, these results suggest that growers should choose competitive hybrids that grow well in their area and are appropriate for their local insect pest populations.…”
Section: Discussionmentioning
confidence: 79%
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“…Buntin (2008) had similarly found improved yields with Bt hybrids but only in late-planted corn with high fall armyworm pressure. Cox et al (2009) noted that Bt hybrids with corn borer resistance traits yielded more than non-Bt isolines but only at sites Fig. 2.…”
Section: Discussionmentioning
confidence: 97%
“…"Triple-stacked" corn is a hybrid corn variety that expresses three transgenic events simultaneously in the same plant, including the following: 1) the CP4 EPSPS (5-enolpyruvulshikimate-3-phosphate synthase) protein that adds resistance to the herbicide glyphosate, 2) Cry1Ab protein to protect against European corn borer (Ostrinia nubilalis), and 3) Cry3Bb1 protein to protect against corn rootworm (Diabrotica spp.) [15]. Given the functional intimacy of these two variables, we surmise that genetically modified corn and glyphosate could be external factors contributing to the increase in ADHD worldwide.…”
Section: Introductionmentioning
confidence: 99%