scholarly journals Insect Management for Sweet Corn

EDIS ◽  
2019 ◽  
Vol 2005 (14) ◽  
Author(s):  
Gregg S. Nuessly ◽  
Susan E. Webb
Keyword(s):  
Sweet Corn ◽  
Fall Armyworm ◽  
Corn Earworm ◽  
Economic Losses ◽  
Publication Date ◽  
Stink Bugs ◽  
White Grubs ◽  
Insect Management ◽  
Sap Beetles ◽  
Root Feeding

Foliar, ear and root feeding insects can routinely cause economic losses to sweet corn if left untreated. The most important pests of sweet corn in Florida are the fall armyworm, corn earworm, lesser cornstalk borer, cutworms, corn silk fly, cucumber beetles, aphids, and wireworms. Less common pests of sweet corn include grasshoppers, corn blotch leafminer, twospotted spider mites, sap beetles, stink bugs, maize weevils and billbugs, white grubs, and white fringed beetles.  This document is ENY-472 (which replaces ENY-449), one of a series of the Department of Entomology and Nematology, UF/IFAS Extension. Original publication date November 2001. Revised September 2005.  ENY-472/IG158: Insect Management for Sweet Corn (ufl.edu)

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 Control of Fall Armyworm and Corn Earworm with Chemical and Biological Insecticides in Florida Sweet Corn, Fall 1994

1996 ◽  
Vol 21 (1) ◽  
pp. 113-114
Author(s):  
P.A. Stansly ◽  
J.M. Conner
Keyword(s):  
Bacillus Thuringiensis ◽  
Sweet Corn ◽  
Fall Armyworm ◽  
Corn Earworm ◽  
Diaphragm Pump ◽  
High Clearance

Abstract The efficacy of azadirachtin formulations alone and in combination with Bacillus thuringiensis var. aizawai, two formulations of cyhalothrin, and Lannate were compared. Six polyethylene-mulched beds 32 inches wide configured in 2 sets of 3 on 6 ft centers separated by a 15 ft drive middle were planted on 29 Aug in double rows 12 inches between rows and plants. The center bed was used as an untreated source of inoculum and the remaining beds divided into 33 ft plots and assigned treatments in a RCBD with 7 treatments and 4 replications. Whorls of all plants were inoculated with 1-2 neonate fall armyworm larvae on 5 Oct using a bazooka gun and Grito-O-Cobs at 24-4O mesh. Treatments were applied weekly for 6 weeks beginning 7 Oct using a high clearance sprayer configured with 1 overhead nozzle per row equipped with a diaphragm pump operating at 200 psi and calibrated to delivery 21 gpa at 2.5 mph. APSA 80 was tank mixed with Karate and Lannate treatments at 5 oz/100 gallon. The dispersants Petro and Morwet were added to 25% of the spray water at a rate of 0.38 gram of 3% microencapsulated azadirachtin (WRC7305) and mixed for 3 minutes before adding remaining water containing the adjuvant B-1956 at 2 oz/gal. Feeding on inner 3 whorl leaves or tassel was rated weekly for 16 plants on a scale of 1 to 6 corresponding to 0, >1%, 2-5%, 6-10%, 11-30%, and >30% damage respectively. The same 16 plants per plot were harvested twice and number and ears evaluated for weight and marketability. Culls were evaluated as to cause of damage and larvae identified and counted. In addition, 10 stalks from each plot were opened to search for borers but none were found.

scholarly journals EFFICACY OF FOLIAR INSECTICIDES AGAINST CORN EARWORM AND FALL ARMYWORM ON SWEET CORN, 2009

2010 ◽  
Vol 35 (1) ◽  
Author(s):  
John F. Smith ◽  
Lucas N. Owen ◽  
Angus L. Catchot
Keyword(s):  
Sweet Corn ◽  
Fall Armyworm ◽  
Corn Earworm

EVALUATION OF SELECTED INSECTICIDES FOR CONTROL OF CORN EARWORM AND FALL ARMYWORM IN SWEET CORN, 2004

2005 ◽  
Vol 30 (1) ◽  
Author(s):  
J. Kurk Lance ◽  
John N. All ◽  
Michelle Samuel-Foo
Keyword(s):  
Sweet Corn ◽  
Fall Armyworm ◽  
Corn Earworm

scholarly journals Insect Management for Leafy Vegetables (Lettuce, Endive and Escarole)

EDIS ◽  
2019 ◽  
Vol 2005 (14) ◽  
Author(s):  
Gregg S. Nuessly ◽  
Susan E. Webb
Keyword(s):  
Disease Transmission ◽  
Corn Earworm ◽  
Leafy Vegetables ◽  
Publication Date ◽  
Original Publication ◽  
Insect Management ◽  
Leaf Mining ◽  
Cucumber Beetles ◽  
Fly Larvae

Damage to leafy vegetables results from holes chewed in leaves by caterpillars and beetles, leaf mining by fly larvae and disease transmission and head contamination by piercing sucking insects. Major pests of these crops are beet and southern armyworms, cutworms, cabbage loopers, dipterous leafminers, aphids, cucumber beetles and wireworms. Less common pests of leafy vegetables include seedcorn maggot, seedcorn beetle and corn earworm. This document is ENY-475 (which replaces ENY-430, ENY-432, and ENY-440), one of a series of the Department of Entomology and Nematology, UF/IFAS Extension. Original publication date July 2002. Revised September 2005. ENY-475/IG161: Insect Management for Leafy Vegetables (ufl.edu)

Efficacy of Insecticides for Control of Insect Pests of Pearl Millet for Grain Production

2007 ◽  
Vol 8 (1) ◽  
pp. 26 ◽  
Author(s):  
G. David Buntin ◽  
Wayne A. Hanna ◽  
Jeffrey P. Wilson ◽  
Xinzhi Ni
Keyword(s):  
Pearl Millet ◽  
Insect Pests ◽  
Pennisetum Glaucum ◽  
Corn Earworm ◽  
Stink Bug ◽  
Grain Production ◽  
Stink Bugs ◽  
Insect Management ◽  
Southern Green Stink Bug ◽  
Sorghum Webworm

Pearl millet [Pennisetum glaucum (L.) R. Br.] is an alternative drought-tolerant grain crop for dryland summer production. Few insecticides are registered for use and insect management has not been extensively studied in pearl millet for grain production. Eleven trails were conducted during 2002-2004 in central and southern Georgia to understand the relative importance of insect pests and to evaluate the efficacy of currently registered insecticides against key pests. The main defoliator species were the fall armyworm [Spodoptera frugiperda (J.E. Smith)] and striped grassworm (Mocis latipes Guenée). Main insects feeding on grain heads were the corn earworm (Helicoverpa zea Boddie), sorghum webworm, (Nola sorghiella Riley), and stink bugs — brown stink bug (Euschistus spp.) and southern green stink bug [Nezara viridula (L.)]. All insects were effectively controlled by cypermethrin at 0.025 lb a.i./acre. The 0.015-lb a.i. rate was effective against sorghum webworm, striped grassworm, and stink bugs, but efficacy against the corn earworm was variable. Spinosad was effective against corn earworm, striped grassworm, and sorghum webworm but not against stink bugs. Azadirachtin was not effective against any insect tested. Grain yield was not significantly affected by treatments in any trial indicating that pearl millet is tolerant of insect injury. Further work will be needed to define economic thresholds for key insect pests of pearl millet for grain production. Accepted for publication 24 August 2006. Published 19 February 2007.

Management of Corn Earworm and Fall Armyworm (Lepidoptera: Noctuidae) Injury on a Sweet Corn Hybrid Expressing a cryIA(b) Gene

1999 ◽  
Vol 92 (5) ◽  
pp. 1217-1222 ◽  
Author(s):  
R. E. Lynch ◽  
B. R. Wiseman ◽  
H. R. Sumner ◽  
D. Plaisted ◽  
D. Warnick
Keyword(s):  
Sweet Corn ◽  
Fall Armyworm ◽  
Corn Earworm ◽  
Lepidoptera Noctuidae ◽  
Corn Hybrid
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