Evaluation of J. C. Eldredge Popcorn Collection for Resistance to Corn Earworm, Fall Armyworm (Lepidoptera: Noctuidae), and European Corn Borer (Lepidoptera: Pyralidae)

1991 ◽  
Vol 84 (2) ◽  
pp. 693-698 ◽  
Author(s):  
R. L. Wilson ◽  
B. R. Wiseman ◽  
G. L. Reed
Keyword(s):  
European Corn Borer ◽  
Fall Armyworm ◽  
Corn Earworm ◽  
Corn Borer ◽  
Lepidoptera Pyralidae ◽  
Lepidoptera Noctuidae

Ear Pests and Damage to Organic, Conventional and Bt-Protected Sweet Corn Grown in Central Kentucky

2009 ◽  
Vol 44 (4) ◽  
pp. 383-390
Author(s):  
John D. Sedlacek ◽  
Karen L. Friley ◽  
Steve L. Hillman
Keyword(s):  
Helicoverpa Zea ◽  
European Corn Borer ◽  
Sweet Corn ◽  
Crop Protection ◽  
Fall Armyworm ◽  
Corn Earworm ◽  
Genetically Engineered ◽  
Corn Borer ◽  
Sap Beetles ◽  
Southwestern Corn Borer

Sweet corn (Zea mays L. var. rugosa) was grown in replicated plots in 2004 and 2006 using organic, conventional, and genetically-engineered (Bt) production practices. Organic plots were treated with Entrust® (Dow AgroSciences LLC, Indianapolis, IN) whereas conventional and Bt sweet corn plots were treated with Warrior® (Syngenta Crop Protection, Inc., Greensboro, NC). All plots were treated once at silk emergence. Organic and conventional plots were treated again 1 wk later. Twenty-five ears were harvested from row centers in each treatment subplot to quantify ear pests and assess ear damage. The highest number of corn earworm, Helicoverpa zea (Boddie), larvae were found on organically-grown sweet corn. European corn borer, Ostrinia nubilalis (Hübner); southwestern corn borer, Diatraea grandiosella Dyar; and fall armyworm, Spodoptera frugiperda (J.E. Smith), larvae were not found as frequently. Neither corn earworm nor European corn borer larvae were found on Bt sweet corn ears. Sap beetles, Carpophilus lugubris Murray, were found on all 3 types of sweet corn. Organically and conventionally-grown sweet corn had a greater number of tip-damaged ears and numbers of damaged kernels per ear than Bt sweet corn. Ear length and weight were the same for all 3 types of sweet corn. Based on the information generated in this study, growing late-planted sweet corn organically or conventionally on a large commercial scale with a limited spray program and without using other types of ear pest management does not appear to be a practical or profitable option in central Kentucky.

scholarly journals EUROPEAN CORN BORER, FALL ARMYWORM AND CORN EARWORM CONTROL, 1998.

1999 ◽  
Vol 24 (1) ◽  
Author(s):  
P. Kolarik ◽  
A. Byrne ◽  
W. Pett ◽  
B. Bishop ◽  
E. Grafius ◽  
...  
Keyword(s):  
European Corn Borer ◽  
Fall Armyworm ◽  
Corn Earworm ◽  
Corn Borer
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