Optimal Oviposition by the Corn Earworm (Lepidoptera: Noctuidae) on Whorl-Stage Sweet Corn

1988 ◽  
Vol 17 (4) ◽  
pp. 722-726 ◽  
Author(s):  
W. D. Wiesenborn ◽  
J. T. Trumble
Keyword(s):  
Sweet Corn ◽  
Corn Earworm ◽  
Optimal Oviposition ◽  
Lepidoptera Noctuidae

Field Bioassay of Pheromone Lures and Trap Designs for Monitoring Adult Corn Earworm (Lepidoptera: Noctuidae) in Sweet Corn in Southern New England

1920 ◽  
Vol 17 (3) ◽  
pp. 1833-1836
Author(s):  
Norman L. Gauthier ◽  
Patrick A. Logan ◽  
Lisa A. Tewksbury ◽  
Craig F. Hollingsworth ◽  
Donald C. Weber ◽  
...  
Keyword(s):  
New England ◽  
Rhode Island ◽  
Helicoverpa Zea ◽  
Sweet Corn ◽  
Corn Earworm ◽  
Reference Standards ◽  
Fresh Market ◽  
Field Bioassay ◽  
Southern New England ◽  
Lepidoptera Noctuidae

Four commercial pheromones attractive to Helicoverpa zea (Boddie) were used as baits in four insect traps to attract moths in fresh market sweet corn. Moth catches were monitored for 10 wk in nine sites in Connecticut, Massachusetts, and Rhode Island. Zealure attracted twice as many moths as Scentry's corn earworm lure and nine times as many as Pherocon's corn earworm lure. Consep Membrane's Biolure attracted few moths. Hartstack traps caught three times more moths than Heliothis net traps and 15 times more than Multi-pher or International Pheromone Systems traps. Results suggest the need for reference standards in management programs that use pheromones to monitor corn earworm populations.

FIELD RELEASES OF TRICHOGRAMMA PRETIOSUM RILEY (HYMENOPTERA: TRICHOGRAMMATIDAE) FOR SUPPRESSION OF CORN EARWORM, HELIOTHIS ZEA (BODDIE) (LEPIDOPTERA: NOCTUIDAE), EGG POPULATIONS ON SWEET CORN IN NOVA SCOTIA

1990 ◽  
Vol 122 (6) ◽  
pp. 1259-1266 ◽  
Author(s):  
Kenneth A. Neil ◽  
H.B. Specht
Keyword(s):  
Nova Scotia ◽  
Sweet Corn ◽  
Heliothis Zea ◽  
Corn Earworm ◽  
Effective Control ◽  
Trichogramma Pretiosum ◽  
Chemical Treatments ◽  
Trap Catches ◽  
Lepidoptera Noctuidae ◽  
Spray Applications

AbstractTrichogramma pretiosum Riley was released in the field for suppression of corn earworm, Heliothis zea (Boddie), egg populations in Nova Scotia in 1985–1987. Trichogramma pretiosum reduced com earworm populations 7.4–53% compared with chemical treatments reductions of 19–100%. Trichogramma pretiosum were not as effective as insecticides, especially when populations of the corn earworm were low (less than five larvae per 1000 ears). Timing of T. pretiosum releases and spray applications were determined by blacklight trap catches and were considered critical for effective control.

Model of Corn Earworm (Lepidoptera: Noctuidae) Development, Damage, and Crop Loss in Sweet Corn

1993 ◽  
Vol 86 (3) ◽  
pp. 906-916 ◽  
Author(s):  
Leonard B. Coop ◽  
Brian A. Croft ◽  
Raymond J. Drapek
Keyword(s):  
Sweet Corn ◽  
Corn Earworm ◽  
Crop Loss ◽  
Lepidoptera Noctuidae
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