Resistant Hybrids and Bacillus thuringiensis for Management of European Corn Borer (Lepidoptera: Pyralidae) in Sweet Corn

1996 ◽  
Vol 89 (1) ◽  
pp. 82-91 ◽  
Author(s):  
Patricia C. Bolin ◽  
William D. Hutchison ◽  
David W. Davis
Keyword(s):  
Bacillus Thuringiensis ◽  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Borer ◽  
Lepidoptera Pyralidae

Effect of Bacillus thuringiensis Application Interval on European Corn Borer (Lepidoptera: Pyralidae) Control in Sweet Corn

1995 ◽  
Vol 30 (3) ◽  
pp. 374-389 ◽  
Author(s):  
David W. Bartels ◽  
William D. Hutchison ◽  
Vincent A. Fritz ◽  
George R. Klacan
Keyword(s):  
Bacillus Thuringiensis ◽  
European Corn Borer ◽  
Sweet Corn ◽  
Natural Populations ◽  
Corn Borer ◽  
First Instar ◽  
Additional Control ◽  
Dependent Variables ◽  
Lepidoptera Pyralidae ◽  
Low Rate

Ground-applied treatments of two commercial Bacillus thuringiensis subsp. kurstaki formulations (MVP and Dipel ES) and tank-mixes with a pyrethroid (Ambush 2E) were evaluated for control of European corn borer, Ostrinia nubilalis (Hübner), larvae in sweet corn. Treatments were applied at average intervals of 3.4, 5, 7, and 10 days to determine field persistence. Manual infestations of first-instar O. nubilalis were used to augment natural populations. During both years, there were no significant interactions between application interval and treatment for all dependent variables tested, including late instars per ear, percent marketability, yield, and predator density. Regardless of application interval, MVP provided greater larval control than Dipel ES. However, the decline in efficacy of the encapsulated MVP formulation occurred at the same rate as that of the non-encapsulated Dipel ES formulation over the 3.4 to 10-d intervals. Tank-mixes of B. thuringiensis + low-rate permethrin provided no additional control compared with low-rate permethrin alone. Given the infestation levels present in this test, neither B. thuringiensis formulation provided control sufficient to maintain current processor standards of 5–10% infested ears at harvest.

DOSE–MORTALITY RESPONSE OF EUROPEAN CORN BORER (LEPIDOPTERA: PYRALIDAE) THIRD-INSTAR LARVAE TO SELECTED INSECTICIDES

1993 ◽  
Vol 125 (6) ◽  
pp. 1137-1139 ◽  
Author(s):  
William D. Hutchison
Keyword(s):  
United States ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Borer ◽  
Mortality Response ◽  
Ca 50 ◽  
Lepidoptera Pyralidae ◽  
Economic Pest ◽  
Insecticide Control

The European corn borer, Ostrinia nubilalis Hübner, continues to be a consistent economic pest of field and sweet corn (Zea mays L.) in the upper midwestem United States. In Minnesota alone, O. nubilalis control costs and losses to sweet corn (ca. 50 630 ha) exceed $5,000,000 annually (Noetzel et al. 1985). Despite recent efforts to implement alternatives (Lewis and Bing 1991; Prokrym et al. 1992; Bartels and Hutchison 1993; Bolin et al. 1993), insecticide control continues to play a central role in O. nubilalis management programs.

Treatment Thresholds for European Corn Borer (Lepidoptera: Pyralidae) Infestations in Early-Season Fresh Market Sweet Corn

1998 ◽  
Vol 33 (4) ◽  
pp. 393-399 ◽  
Author(s):  
Dale I. M. Riggs ◽  
Michael P. Hoffmann ◽  
Larry C. Thetford
Keyword(s):  
New York ◽  
European Corn Borer ◽  
Sweet Corn ◽  
Fresh Market ◽  
Marketable Yield ◽  
Corn Borer ◽  
Air Blast ◽  
Early Season ◽  
Treatment Thresholds ◽  
Lepidoptera Pyralidae

We examined the effect of varying thresholds for treatment of first generation European corn borer, Ostrinia nubilalis (Hübner), infestations in early-season fresh market sweet corn in eastern New York over a 3-year period. Seven treatment thresholds were compared: (1) 15% infested plants at whorl stage, 5% infested plants at tassel and silk stage, (2) 15% at whorl stage, 15% at tassel and silk stage, (3) 30% at whorl stage, 5% at tassel and silk stage, (4) 30% at whorl stage, 15% at tassel and silk, (5) 5% at tassel and silk stage, (6) 15% at tassel and silk stage, and (7) control (untreated). When thresholds were reached, permethrin was applied using an air-blast sprayer. Results indicated little difference in percentage marketable ears whether plants were treated or not at whorl stage, and the tassel stage threshold could be raised to 15% infested plants with no significant effect on percentage marketable ears. We found no difference in marketable yield among plots treated from one side or both sides with an air-blast sprayer.

Distribution of European Corn Borer (Lepidoptera: Pyralidae) Egg Masses and Larvae on Sweet Corn in New York

1986 ◽  
Vol 15 (3) ◽  
pp. 501-506 ◽  
Author(s):  
A. M. Shelton ◽  
J. P. Nyrop ◽  
A. Seaman ◽  
R. E. Foster
Keyword(s):  
New York ◽  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Borer ◽  
Egg Masses ◽  
Lepidoptera Pyralidae

Effect of Weed Abundance on European Corn Borer (Lepidoptera: Pyralidae) Infestation of Sweet Corn

1990 ◽  
Vol 19 (6) ◽  
pp. 1858-1865 ◽  
Author(s):  
Donald C. Weber ◽  
Francis X. Mangan ◽  
David N. Ferro ◽  
Herbert V. Marsh
Keyword(s):  
European Corn Borer ◽  
Sweet Corn ◽  
Corn Borer ◽  
Lepidoptera Pyralidae
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