Efficacy of transgenic corn hybrids producingBacillus thuringiensisproteins against natural infestations ofEoreuma loftini(Lepidoptera: Crambidae) in Louisiana

2016 ◽  
Author(s):  
Julien Beuzelin
Keyword(s):  
Transgenic Corn ◽  
Corn Hybrids

Performance of Transgenic Corn Hybrids in Missouri for Insect Control and Yield

2000 ◽  
Vol 93 (3) ◽  
pp. 993-999 ◽  
Author(s):  
B. D. Barry ◽  
L. L. Darrah ◽  
D. L. Huckla ◽  
A. Q. Antonio ◽  
G. S. Smith ◽  
...  
Keyword(s):  
Insect Control ◽  
Transgenic Corn ◽  
Corn Hybrids

scholarly journals Macronutrient uptake and export in transgenic corn under two levels of fertilization

2018 ◽  
Vol 53 (12) ◽  
pp. 1363-1372
Author(s):  
Carine Gregório Machado Silva ◽  
Álvaro Vilela de Resende ◽  
Aarón Martínez Gutiérrez ◽  
Silvino Guimarães Moreira ◽  
Emerson Borghi ◽  
...  
Keyword(s):  
Dry Matter ◽  
Block Design ◽  
Growth Stages ◽  
Transgenic Corn ◽  
Corn Hybrids ◽  
Differential Behavior ◽  
Supplementary Irrigation ◽  
Fertilization Level ◽  
High Fertilization

Abstract: The objective of this work was to evaluate macronutrient uptake and export by transgenic corn hybrids under medium and high fertilization levels. For each fertilization level, a randomized complete block design was carried out in the summer crop season, under no-tillage and supplementary irrigation, with four cultivars and four replicates. Plants were sampled throughout the entire cycle and separated into leaves, stalk, husk, cob, and grains for the determination of dry matter mass and accumulation of macronutrients in the different growth stages. Under the high fertilization level, a greater dry matter mass and nutrient uptake were observed, but grain yield was similar to that under the medium fertilization level. The uptake of N, P, Ca, Mg, and S occurs until later in the cycle of the transgenic cultivars, which also showed lower concentrations of P, K, and S in grains, when compared to older hybrids. The differential behavior of the evaluated cultivars under different fertilization levels indicates the need of updating and improving nutritional management and fertilizer recommendations for the corn crop.

Southwestern corn borer damage and aflatoxin accumulation in conventional and transgenic corn hybrids

2005 ◽  
Vol 91 (2-3) ◽  
pp. 329-336 ◽  
Author(s):  
W. Paul Williams ◽  
Gary L. Windham ◽  
Paul M. Buckley ◽  
James M. Perkins
Keyword(s):  
Transgenic Corn ◽  
Corn Hybrids ◽  
Corn Borer ◽  
Aflatoxin Accumulation ◽  
Southwestern Corn Borer

Decreased Whorl and Ear Damage in Nine Mon810 Bacillus thuringiensis (Bt)-Transgenic Corn Hybrids Compared with Their Non-Bt Counterparts

2006 ◽  
Vol 99 (6) ◽  
pp. 2164-2170 ◽  
Author(s):  
Charles F. Chilcutt ◽  
Gary N. Odvody ◽  
J. Carlos Correa ◽  
Jeff Remmers ◽  
Roy D. Parker
Keyword(s):  
Bacillus Thuringiensis ◽  
Transgenic Corn ◽  
Corn Hybrids

Decreased Whorl and Ear Damage in Nine Mon810 Bacillus thuringiensis (Bt)-Transgenic Corn Hybrids Compared with Their Non-Bt Counterparts

2006 ◽  
Vol 99 (6) ◽  
pp. 2164-2170 ◽  
Author(s):  
Charles F. Chilcutt ◽  
Gary N. Odvody ◽  
J. Carlos Correa ◽  
Jeff Remmers ◽  
Roy D. Parker
Keyword(s):  
Bacillus Thuringiensis ◽  
Transgenic Corn ◽  
Corn Hybrids

Influence of Transgenic Corn Expressing Insecticidal Protein of Bacillus thuringiensis Berliner on Natural Populations of Corn Earworm (Lepidoptera: Noctuidae) and Southwestern Corn Borer (Lepidoptera: Crambidae)

2006 ◽  
Vol 41 (3) ◽  
pp. 221-231 ◽  
Author(s):  
Kerry C. Allen ◽  
Henry N. Pitre
Keyword(s):  
Bacillus Thuringiensis ◽  
Helicoverpa Zea ◽  
Larval Growth ◽  
Natural Populations ◽  
Corn Earworm ◽  
Bt Corn ◽  
Transgenic Corn ◽  
Diatraea Grandiosella ◽  
Corn Hybrids ◽  
Corn Borer

A 2-yr study was conducted to measure the influence of transgenic corn, Zea mays L., expressing the CrylAb endotoxin of Bacillus thuringiensis (Berliner) (Bt) by means of Event MON810 on natural populations of Helicoverpa zea (Boddie) and Diatraea grandiosella (Dyar). The studies were conducted at Leland and Morgan City, MS, in 1999 and at Morgan City in 2000. Although total numbers of H. zea larvae were not significantly different on transgenic corn hybrids compared with their near-isogenic parent lines, fewer large larvae were found on the transgenic hybrids. Differences in H. zea larval growth were noticeable when larvae fed on Bt corn vs non-Bt corn. The delay in larval growth for insects within a single generation, which could possibly result in asynchronous mating between insecticide resistant and susceptible insects, was observed for larvae feeding on plants expressing the Bt toxin. Diatraea grandiosella caused limited damage to the transgenic corn hybrids compared with their near-isogenic parent lines. Yields were not significantly greater for the Bt corn hybrids compared with their near-isogenic parent lines. Yields were not significantly greater for the Bt corn hybrids compared with the near-isogenic, non-Bt corn parents; however, there was a trend toward higher yields for Bt hybrids compared with their near-isogenic non-Bt parents.

scholarly journals Evaluation of Transgenic Corn Against European Corn Borer, 1997D

1998 ◽  
Vol 23 (1) ◽  
pp. 378-378
Author(s):  
K. R. Ostlie ◽  
J. Luedeman ◽  
P. Price ◽  
M. Jharco ◽  
George Nelson
Keyword(s):  
European Corn Borer ◽  
First Generation ◽  
Row Spacing ◽  
Transgenic Corn ◽  
Tunnel Length ◽  
Corn Hybrids ◽  
Corn Borer ◽  
Leaf Injury ◽  
Normal Production ◽  
Production Practices

Abstract This experiment was conducted to assess the per formance of Bacillus thuringiensis transgenic corn hybrids (<95-day RM) and comparable non-Bt hybrids against a natural ECB infestation in west centra Minnesota. This area contains a mixture of univoltine and multivoltine biotypes. Treatments included 3 non-Bt hybrids (Ciba 4144, NK 2555, NK 3030) anc their isogenic counterparts (Max 357, NK 2555Bt, NK 3030Bt) arranged in a RCB design with 6 replications. Plots, each measuring 50 ft by 8 rows (30-inch row spacing), were planted on 19 May at a rate of 30,000 seeds per acre using a Hiniker Econo Till Planter. Planting preparations, fertilizer and herbicide ap plications followed normal production practices. First generation evaluations on 5 Aug included % of plants with leaf injury, leaf injury ratings (1 to 9 scale) number of tunnels, and tunnel length. Combined effects of univoltine and second generations were measured by examining tunnel number and length, ear anc shank infestations, and overwintering larvae on 20 Sept. Plots were harvested on 10 Oct and yields were corrected to 15.5% moisture.

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