Hybrid and Nitrogen Source Affect Yield and European Corn Borer Damage

Singer, Jeremy W.; Heckman, Joseph R.; Ingerson-Mahar, Joseph; Westendorf, Michael L.

doi:10.1300/j064v16n01_03

Cited by 10 publications

(8 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…When infestation levels of insects and weeds are high, TCs would provide higher yield compared to the conventional varieties. These trends were observed by other field studies (Bertram and Pedersen, 2004;Bruns and Abbas, 2006;Dillehay et al, 2004;Heatherly et al, 2002;Heatherly et al, 2003;Lauer and Wedberg, 1999;Mungai et al, 2005;Shaw et al, 2001;Singer et al, 2000;Stanger and Lauer, 2006).…”

Section: Crop Types Effectsupporting

confidence: 84%

“…For instance, Stanger and Lauer (2006) conducted yield response to planting population studies in Wisconsin and found Bt hybrid corn yielded 5.9 to 8.0% more than their near isolines. Even though the yield increase in Bt hybrid corn was documented in many other field experiments (Bruns and Abbas, 2006;Catangui and Berg, 2002;Mungai et al, 2005;Singer et al, 2000), crop yield varied depending upon regions and years due to the different growing conditions. For example, transgenic Bt corn did not provide a yield increase over their normal counterparts under conditions of low corn borer infestation in the northeastern US (Cox and Cherney, 2001).…”

Section: Transgenic Traits Effectmentioning

confidence: 96%

See 1 more Smart Citation

A Meta-Analysis for the Impact of Transgenic Crop Adoption on Corn and Soybean Yield

Lee¹,

Lee²,

Hwang³

et al. 2012

Korean Journal of Soil Science and Fertilizer

View full text Add to dashboard Cite

Although there is a broad dispute over genetically modified foods on safety, the worldwide adoption of transgenic crops is rapidly increasing. The objectives of this study were to identify trends in the effects of transgenic on crop yields and examine the effect of agricultural variables including crop type, biotech trait, tillage system, and yield environment on corn and soybean yield. A meta-analysis from the 34 peer-reviewed scientific literatures was conducted to compare the crop yield between transgenic crops and conventional varieties. Results showed that the yield of transgenic corn and soybean was strongly dependent on growing conditions. Transgenic hybrids had higher yield potential in the low crop yield environments such as high weeds and/or insect infestation, low soil water, and cool temperature conditions, while transgenic crops did not have yield advantages in high yield environments. The results from this study suggest that producers should consider the potential yield environmental conditions and possible yield reductions when producers choose crop hybrids in their fields.

show abstract

Section: Crop Types Effectsupporting

confidence: 84%

Section: Transgenic Traits Effectmentioning

confidence: 96%

A Meta-Analysis for the Impact of Transgenic Crop Adoption on Corn and Soybean Yield

Lee¹,

Lee²,

Hwang³

et al. 2012

Korean Journal of Soil Science and Fertilizer

View full text Add to dashboard Cite

show abstract

“…Yield differences were limited to 657Bt and 657, where a 5% advantage was found for Bt corn. Yield comparisons between Bt and near‐isoline hybrids were conducted at this location in 1997 and 1998, and only 1997 had high levels of ECB damage that produced a 13% yield advantage in the Bt hybrid (10). Baute et al (1) reported that a minimum of 2.4 inches per plant of tunneling damage was necessary to achieve a yield response to Bt hybrids under Ontario conditions.…”

Section: Yield and Optimum Densities In Bt And Near‐isoline Hybridsmentioning

confidence: 99%

Corn Yield Response of Bt and Near-Isolines to Plant Density

Singer¹,

Taylor

Bamka

2003

Crop Management

View full text Add to dashboard Cite

Optimum plant densities for Bacillus thuringiensis (Bt) corn (Zea mays L.) should be higher than non‐transgenic corn subjected to European corn borer (ECB; Ostrinia nubilalis Hübner) damage because of the reduced potential for stalk lodging. The objectives of this research were to determine if yield differences occurred in Bt compared to near‐isoline hybrids and to determine if different optimum densities exist for Bt and near‐isolines. Bt hybrids were compared at target densities ranging from 20000 to 36000 plants per acre at different mid‐Atlantic locations in 2000 and 2001. Yield increases ranged from 5 to 8% in 2000 at all locations. In contrast, Bt corn performed better than near‐isolines at only one of three locations in 2001, with a 10% yield advantage. Relationships between yield of near‐isolines and ECB damage were weak. Plant density affected yield at all locations in both years. Regression analysis of grain yield on plant density did not reveal a consistent hybrid response, although some evidence exists that suggests Bt hybrids are more efficient than near‐isolines at producing yield as plant density increases. The inability to identify different optimum densities for Bt and near‐isolines may have been due to low stalk lodging, plant density treatments that did not maximize yield in most instances, or the absence of different optimum densities.

show abstract

“…Manure plots received 5.5 to 22.6 Mg ha Ϫ1 DM of dairy manure annually from 1995-1998. A detailed explanation of previous experimental treatments is found in Singer et al (2000).…”

Section: Methodsmentioning

confidence: 99%

“…But occasionally applying manure to land that seldom receives it has agronomic benefits that may be worth considering. In a previous study (Singer et al, 2000), we applied manure to land that had no prior history of manure and we showed that corn grain yields were increased by 5% under non-N limiting conditions with manure compared to sidedress N. Manuring increased soil organic matter content and reduced requirements for N fertilizer. The objectives of this research were to determine the residual effect of dairy manure applied for corn production on subsequent continuous soybean.…”

mentioning

confidence: 87%