Extended evaluation of Bt protein cross‐pollination in seed blend plantings on survival, growth, and development of Helicoverpa zea feeding on refuge ears

2019 ◽  
Vol 76 (3) ◽  
pp. 1011-1019 ◽  
Author(s):  
Fei Yang ◽  
David L Kerns ◽  
Graham P Head ◽  
Paula A Price ◽  
Ronnie Levy ◽  
...  
Keyword(s):  
Growth And Development ◽  
Helicoverpa Zea ◽  
Cross Pollination ◽  
Bt Protein

scholarly journals Influence of Dual-Bt Protein Corn on Bollworm,Helicoverpa zea(Boddie), Survivorship on Bollgard II Cotton

2016 ◽  
Vol 109 (2) ◽  
pp. 860-864 ◽  
Author(s):  
M. B. Von Kanel ◽  
J. Gore ◽  
A. Catchot ◽  
D. Cook ◽  
F. Musser ◽  
...  
Keyword(s):  
Helicoverpa Zea ◽  
Bt Protein

Influence of Cotton Plant Structures on Heliothine Larval Development and the Production and Infectivity of Occlusion Bodies of Nucleopolyhedrovirus in Larvae

2003 ◽  
Vol 38 (3) ◽  
pp. 368-376
Author(s):  
M. Ibrahim Ali ◽  
S. Y. Young ◽  
G. W. Felton ◽  
D. A. Streett
Keyword(s):  
Growth And Development ◽  
Helicoverpa Zea ◽  
Larval Growth ◽  
Developmental Period ◽  
Pupal Weight ◽  
Plant Structure ◽  
Larval Weight ◽  
Highest Weight ◽  
Occlusion Bodies ◽  
The Mean

Helicoverpa zea (Boddie) and Heliothis virescens (F.), reared on different cotton structures, were studied for larval growth and development, susceptibility to H. zea nucleopolyhedrovirus (HzNPV), and production of occluded virus (OBs). Larval weight of both species after 10 d of rearing differed with larvae on artificial diet having the highest weight and those on square bracts the lowest weight. In both species, pupal weight and length of pupal developmental period were positively correlated with the larval weight, but length of the larval developmental period was negatively correlated with larval weight. Mortality from virus infection of H. zea and H. virescens larvae on squares, square bracts or flowers did not differ significantly among the structures. In both species, the number of viral OBs produced was greater in larvae fed flowers than those fed other structures and was positively correlated with the weight gained by a healthy larva on that plant structure. The mean LC50 for OBs produced in H. zea or H. virescens larvae on square, square bract or flower did not differ significantly. These results indicate that dietary difference in fruiting structures of cotton plants directly affects H. zea and H. virescens larval growth and development and indirectly affects the production of virus by HzNPV-infected larvae.

scholarly journals Genetic basis of resistance to the Vip3Aa Bt protein in Helicoverpa zea

2020 ◽  
Author(s):  
Fei Yang ◽  
José C Santiago González ◽  
Gregory A Sword ◽  
David L Kerns
Keyword(s):  
Helicoverpa Zea ◽  
Genetic Basis ◽  
Bt Protein

scholarly journals Development, survival, and feeding behavior of Helicoverpa zea (Lepidoptera: Noctuidae) relative to Bt protein concentrations in corn ear tissues

PLoS ONE ◽  
2019 ◽  
Vol 14 (8) ◽  
pp. e0221343 ◽  
Author(s):  
Tom R. Bilbo ◽  
Francis P. F. Reay-Jones ◽  
Dominic D. Reisig ◽  
Jeremy K. Greene ◽  
Matthew W. Turnbull
Keyword(s):  
Feeding Behavior ◽  
Helicoverpa Zea ◽  
Bt Protein ◽  
Lepidoptera Noctuidae

Soybean Growth and Development Alterations caused by Helicoverpa zea (Boddie) Feeding

1992 ◽  
Vol 84 (5) ◽  
pp. 813-820 ◽  
Author(s):  
Craig S. Eckel ◽  
J.R. Bradley ◽  
John W. Van Duyn
Keyword(s):  
Growth And Development ◽  
Helicoverpa Zea

Association of Insect-Derived Ear Injury With Yield and Aflatoxin of Maize Hybrids Varying in Bt Transgenes

2019 ◽  
Vol 48 (6) ◽  
pp. 1401-1411 ◽  
Author(s):  
Luke S Pruter ◽  
Michael J Brewer ◽  
Mark A Weaver ◽  
Seth C Murray ◽  
Thomas S Isakeit ◽  
...  
Keyword(s):  
Helicoverpa Zea ◽  
Fall Armyworm ◽  
Integrated Approach ◽  
Corn Earworm ◽  
Data Sets ◽  
Maize Production ◽  
Maize Hybrids ◽  
Corpus Christi ◽  
Bt Protein ◽  
Ear Injury

Abstract Environmental factors have been associated with the production of aflatoxin in maize, Zea mays L., and it is inconclusive whether transgenic, Bacillus thuringiensis (Bt), maize has an impact on aflatoxin accumulation. Maize hybrids differing in transgenes were planted in two locations from 2014 to 2017. Yield, aflatoxin, and ear injury caused by corn earworm, Helicoverpa zea (Boddie), and fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), were measured across three groups of hybrids differing in transgenes including near-isogenic hybrids, and water-stressed conditions. The hybrid groups consisted of non-Bt hybrids with no Bt transgenes, a second group with one or more Cry-Bt transgenes, and the third group with vegetative insecticidal Bt protein and Cry-Bt transgenes (Cry/Vip-Bt). Across the six data sets derived from 11 experiments, the Cry-Bt and Cry/Vip-Bt hybrids had less ear injury and aflatoxin on average than non-Bt hybrids. The effects of ear injury on yield and aflatoxin were more prominent and consistent in Corpus Christi, TX, where hybrids experienced more water-limited conditions than in College Station, TX. The trend of increased aflatoxin among hybrids with increased ear injury was further resolved when looking at Cry-Bt and Cry/Vip-Bt isogenic hybrids in Corpus Christi. The results supported that the maize hybrids with the inclusion of Cry-Bt and Cry/Vip-Bt transgenes warrant further investigation in an integrated approach to insect and aflatoxin management in sub-tropical rain-fed maize production regions. Research outcomes may be improved by focusing on areas prone to water-stress and by using hybrids with similar genetic backgrounds.

scholarly journals Pollen Sources Influence Early Fruit Growth of Southern Highbush Blueberry

1997 ◽  
Vol 122 (5) ◽  
pp. 625-629 ◽  
Author(s):  
Y.H. Huang ◽  
C.E. Johnson ◽  
G.A. Lang ◽  
M.D. Sundberg
Keyword(s):  
Growth And Development ◽  
Vaccinium Corymbosum ◽  
Fruit Growth ◽  
Stage Iii ◽  
Highbush Blueberry ◽  
Ovule Abortion ◽  
Cross Pollination ◽  
Self Pollination ◽  
Pollen Sources ◽  
Southern Highbush

Ovule abortion occurred between 5 and 10 days after pollination (DAP) in self- and cross-pollinated `Sharpblue' blueberry (Vaccinium corymbosum L.) fruit. More ovule abortion occurred with self-pollination (35%) than with cross-pollination (22% for `Sharpblue' × `O'Neal' and 29% for `Sharpblue' × `Gulfcoast'), and there were more poorly developed ovules with self-pollination (88.1%) than with cross-pollination (× `O'Neal', 33.6%; × `Gulfcoast' 50.8%). The increase in ovule area correlated exponentially with fruit growth during early developmental stages, regardless of pollination treatment. However, cross-pollination resulted in significantly greater ovule area and fruit mass during early fruit development as well as at ripening. Ovule area was maximum at 25 to 30 DAP for both pollination treatments, followed by exponential fruit growth (stage III). Cross-pollination resulted in greater fruit growth and a shorter stage III. At 10 DAP, ovules from cross-pollination were larger than those from self-pollination, suggesting that cross-pollination initiated ovule growth immediately after fertilization. This research suggests that southern highbush blueberry fruit growth and development is intimately associated with ovule growth and development, which is affected by pollen sources.

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