Registration of Six Corn Earworm Resistant Germplasm Lines of Maize

Crop Science ◽  
1988 ◽  
Vol 28 (1) ◽  
pp. 202-202 ◽  
Author(s):  
N. W. Widstrom ◽  
B. R. Wiseman ◽  
W. W. McMillian
Keyword(s):  
Corn Earworm

scholarly journals Insecticide Efficacy Against Corn Earworm in Sweet Corn, 2019

2020 ◽  
Vol 45 (1) ◽  
Author(s):  
David Owens ◽  
Joseph Deidesheimer ◽  
Cody Stubbs
Keyword(s):  
Sweet Corn ◽  
Corn Earworm ◽  
Insecticide Efficacy

scholarly journals Genetic Mechanisms Underlying Apimaysin and Maysin Synthesis and Corn Earworm Antibiosis in Maize (Zea mays L.)

Genetics ◽  
1998 ◽  
Vol 149 (4) ◽  
pp. 1997-2006
Author(s):  
E A Lee ◽  
P F Byrne ◽  
M D McMullen ◽  
M E Snook ◽  
B R Wiseman ◽  
...  
Keyword(s):  
Helicoverpa Zea ◽  
Larval Growth ◽  
Corn Earworm ◽  
Phenotypic Variance ◽  
Significant Qtls ◽  
F2 Population ◽  
Genetic Mechanisms ◽  
Trait Locus ◽  
Maize Silks ◽  
Related Compounds

Abstract C-glycosyl flavones in maize silks confer resistance (i.e., antibiosis) to corn earworm (Helicoverpa zea [Boddie]) larvae and are distinguished by their B-ring substitutions, with maysin and apimaysin being the di- and monohydroxy B-ring forms, respectively. Herein, we examine the genetic mechanisms underlying the synthesis of maysin and apimaysin and the corresponding effects on corn earworm larval growth. Using an F2 population, we found a quantitative trait locus (QTL), rem1, which accounted for 55.3% of the phenotypic variance for maysin, and a QTL, pr1, which explained 64.7% of the phenotypic variance for apimaysin. The maysin QTL did not affect apimaysin synthesis, and the apimaysin QTL did not affect maysin synthesis, suggesting that the synthesis of these closely related compounds occurs independently. The two QTLs, rem1 and pr1, were involved in a significant epistatic interaction for total flavones, suggesting that a ceiling exists governing the total possible amount of C-glycosyl flavone. The maysin and apimaysin QTLs were significant QTLs for corn earworm antibiosis, accounting for 14.1% (rem1) and 14.7% (pr1) of the phenotypic variation. An additional QTL, represented by umc85 on the short arm of chromosome 6, affected antibiosis (R2 = 15.2%), but did not affect the synthesis of the C-glycosyl flavones.

scholarly journals Pest Status and Management of Corn Earworm (Lepidoptera: Noctuidae) in Field Corn in the United States

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Francis P F Reay-Jones
Keyword(s):  
United States ◽  
Selection Pressure ◽  
The United States ◽  
Corn Earworm ◽  
Bt Corn ◽  
Pest Status ◽  
Field Corn ◽  
Type Of Injury ◽  
The Impact ◽  
Economic Pest

Abstract The corn earworm, Helicoverpa zea (Boddie), is a common lepidopteran pest of corn (Zea mays L.) in the United States. This article provides an overview of the life history, ecology, plant injury, and management of H. zea in corn. Leaf injury by H. zea feeding can occur in vegetative stage corn, though this type of injury is rare. The most common type of injury is caused by larval feeding in ears. Because kernel injury is typically limited to the tip of the ear, H. zea is generally not considered an economic pest. The use of transgenic corn hybrids expressing insecticidal Cry proteins from Bacillus thuringiensis (Bt) Berliner can reduce injury from H. zea, though complete control is not achieved with most Bt traits. Resistance has been reported to several Bt toxins. Because H. zea is a major economic pest in cotton (Gossypium hirsutum L.) and because H. zea moths that developed on corn can migrate to cotton, selection pressure on H. zea in Bt corn has major implications for the pest status and injury to Bt cotton. Although the impact of H. zea on yield of field corn is generally negligible, the selection pressure exerted by Bt corn has led to management issues in cotton.

scholarly journals CORN EARWORM AND EUROPEAN CORN BORER CONTROL WITH BT-TREATED CORN, 1999

2001 ◽  
Vol 26 (1) ◽  
Author(s):  
K. A. Sorensen ◽  
C. Wade Holloway
Keyword(s):  
European Corn Borer ◽  
Corn Earworm ◽  
Corn Borer

Attraction of Heliothis belladonna (Henry and Edwards) to the Sex Pheromone of the Corn Earworm Moth, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae)

2006 ◽  
Vol 79 (4) ◽  
pp. 303-308 ◽  
Author(s):  
Peter J. Landolt ◽  
Constance L. Smithhisler ◽  
Richard S. Zack ◽  
Leonardo Camelo
Keyword(s):  
Sex Pheromone ◽  
Helicoverpa Zea ◽  
Corn Earworm ◽  
Lepidoptera Noctuidae

Maysin Content and Growth of Corn Earworm Larvae (Lepidoptera: Noctuidae) on Silks from First and Second Ears of Corn

1993 ◽  
Vol 86 (3) ◽  
pp. 939-944 ◽  
Author(s):  
B. R. Wiseman ◽  
M. E. Snook ◽  
D. J. Isenhour
Keyword(s):  
Corn Earworm ◽  
Lepidoptera Noctuidae
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