On the Control of Corn Earworm, Heliothis zea, and Dusky Sap Beetle, Carpophilus lugubris, in Sweet Corn1

1962 ◽  
Vol 55 (5) ◽  
pp. 671-674 ◽  
Author(s):  
Floyd P. Harrison
Keyword(s):  
Heliothis Zea ◽  
Corn Earworm ◽  
Sap Beetle ◽  
Carpophilus Lugubris

SEASONAL ABUNDANCE AND OVIPOSITION RESPONSE OF THE CORN EARWORM, HELIOTHIS ZEA (LEPIDOPTERA: NOCTUIDAE), ON OKRA IN VIRGINIA

1983 ◽  
Vol 115 (11) ◽  
pp. 1539-1541 ◽  
Author(s):  
M. A. Latheef ◽  
J. H. Ortiz
Keyword(s):  
United States ◽  
Insect Pests ◽  
Heliothis Zea ◽  
Limited Resource ◽  
The United States ◽  
Corn Earworm ◽  
Seasonal Abundance ◽  
Vegetable Production ◽  
Fresh Market ◽  
Important Pest

Okra, Abelmoschus esculentus (L.) Moench, is a member of the Malvaceae. It is an important crop in the southern United States where vegetable production becomes precarious during the summer owing to extreme conditions of temperature and drought. Okra is grown in most southern home gardens and is consumed as a main dish vegetable or used in soups and gumbos.Because of its popularity and environmental adaptability, okra may have the potential for attracting fresh market premium prices for limited resource farm operations. However, little has been published on insect pests of okra in the United States. In an investigation at Petersburg, Virginia, during 1979 and 1980, we found that the corn earworm, Heliothis zea (Boddie), was an important pest of okra.

COMPARATIVE PERFORMANCE OF STANDARD AND MODIFIED PHEROMONE-BAITED WING TRAPS FOR CAPTURING HELIOTHIS ZEA (BODDIE)1 (LEPIDOPTERA: NOCTUIDAE)

1989 ◽  
Vol 24 (4) ◽  
pp. 482-488
Author(s):  
H. R. Gross ◽  
J. E. Carpenter
Keyword(s):  
Heliothis Zea ◽  
Corn Earworm ◽  
Cotton Bollworm ◽  
Hardware Cloth ◽  
Comparative Performance ◽  
Equivalent Distance ◽  
Lepidoptera Noctuidae

The wing trap, although economical and commercially available, has never been seriously considered as a standard for monitoring populations of the corn earworm (CEW)/cotton bollworm, Heliothis zea (Boddie), mainly because it is considered inefficient relative to other available traps. Attempts were made to enhance the performance of the Pherocon 1C (P-1C) wing trap by modifying its structure and by varying the placement of the pheromone within the trap. P-1C traps receiving 40–50 g of supplemental adhesive captured 5.1-fold more CEW males than did the P-1C standard. The introduction of horizontal barriers of either Lexan or hardware cloth across the center of the P-1C trap or the placement of Lexan strips to close side trap openings had no effect on the number of CEW males captured. Traps with the pheromone located 1.0–1.5 cm from the top center of the trap captured more males than did traps with the pheromone placed an equivalent distance from the bottom of the trap. Centering the pheromone approximately 2.5 cm back from the end opening of the trap also increased the number of CEW males captured over that of traps in which the pheromone was placed at the top center of the trap. Data suggest that parameters influencing the efficiency of P-1C traps for capturing male CEW are poorly understood.

Effects of Nitrogen Fertility on Bt Endotoxin Levels in Maize

2007 ◽  
Vol 42 (1) ◽  
pp. 35-43 ◽  
Author(s):  
H. Arnold Bruns ◽  
Craig A. Abel
Keyword(s):  
Growth Stage ◽  
Heliothis Zea ◽  
Larval Survival ◽  
Corn Earworm ◽  
Fertility Rates ◽  
Bt Maize ◽  
Tissue Samples ◽  
Corn Borer ◽  
N Fertility ◽  
Mon 810

Three Bt maize hybrids (two with Bt event MON-810, one with Bt event DBT-418) and one nonBt maize hybrid were grown at Stoneville, MS, USA in 2002 and 2003 with N-fertility rates of 0, 112, 224, and 336 kg N/ha, respectively. Tissue samples of the 7th leaf at growth stage V5 (5 fully extended leaves) and primary ear leaf sheaths and outer ear husks at growth stage R3 (milk) were collected and analyzed for endotoxin concentrations. At V5 CrylAb Bt concentrations of the MON-810 hybrids increased whereas there were no N-fertility effects on Cry1Ac in the DBT-418 hybrid. Bioassays from tissue samples at growth stage V5 of all N-fertility treatments for both Bt events were nearly 100% fatal to southwestern corn borer larvae (Diatraea grandiosella_Dyar). Endotoxin concentrations at growth stage R3 increased in both the primary ear leaf sheaths {[Bt] = 0.0006(kg N/ha) + 0.167 r2 = 0.8817 for both MON-810 and DBT-418} and outer ear husks {[Bt] = 0.0006(kg N/ha) + 0.148) r2 = 0.9985 and [Bt] = 0.0007 (kg N/ha) + 0.16) r2 = 0.8702 for MON-810 and DBT-418, respectively} as N fertilization increased in 2003. Bioassays determined that southwestern corn borers were susceptible to even the lowest [Bt] in tissues of MON-810 at R3 but not DBT-418. Diets made from the nonBt hybrid at all stages and N-fertility rates had a nearly 80.0% larval survival rate. Because other Noctuidae pests [i.e., corn earworm (Heliothis zea (Boddie)) and fall armyworm (Spodoptera frugiperda (J. E. Smith))] of corn are more tolerant to Bt toxins, growing Bt maize under adequate levels of N-fertility may be even more important to insure maximum protection from these pests.

Chemical Inducers of Oviposition for the Corn Earworm, Heliothis zea (Boddie)

Science ◽  
1970 ◽  
Vol 168 (3933) ◽  
pp. 856-857 ◽  
Author(s):  
R. L. Jones ◽  
R. L. Burton ◽  
M. C. Bowman ◽  
M. Beroza
Keyword(s):  
Heliothis Zea ◽  
Corn Earworm ◽  
Chemical Inducers

Arylphorin from the corn earworm, Heliothis zea

1986 ◽  
Vol 16 (4) ◽  
pp. 617-625 ◽  
Author(s):  
Norbert H. Haunerland ◽  
William S. Bowers
Keyword(s):  
Heliothis Zea ◽  
Corn Earworm
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