EUROPEAN CORN BORER, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE), ON WHEAT

1980 ◽  
Vol 112 (8) ◽  
pp. 861-863 ◽  
Author(s):  
Harold R. Willson
Keyword(s):  
New York ◽  
Winter Wheat ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Herbaceous Plant ◽  
Corn Borer ◽  
Economic Significance ◽  
Lepidoptera Pyralidae ◽  
Growing Region

The European corn borer, Ostrinia nubilalis Hübner, is known to attack nearly every herbaceous plant large enough for the larvae to enter. Although the borer is primarily considered a pest of corn, economic infestations in such New York crops as potatoes, gladiolus, and other large stem plants are not uncommon.In 1977, 1978, and 1979, economic levels of borer infestations were observed in winter wheat. In 1977, the presence of borer in wheat was noted at a number of sites, but only a few cases could be considered economically significant. However, in the 1978 season, the presence of borer in wheat had become common and reports of economic infestations exceeding 5 or 10% were widespread in the western New York wheat growing region. In 1979, the problem of borer on wheat declined significantly, and of infestations located, only one could be considered of economic significance.

Sex pheromone of the european corn borer,Ostrinia nubilalis (Lepidoptera: Pyralidae), in New York

1975 ◽  
Vol 1 (2) ◽  
pp. 225-231 ◽  
Author(s):  
J. Kochansky ◽  
R. T. Card� ◽  
J. Liebherr ◽  
W. L. Roelofs
Keyword(s):  
New York ◽  
Sex Pheromone ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Corn Borer ◽  
Lepidoptera Pyralidae

Damage by the European Corn Borer (Lepidoptera: Pyralidae) to Winter Wheat

1992 ◽  
Vol 27 (4) ◽  
pp. 361-365
Author(s):  
G. David Buntin
Keyword(s):  
Winter Wheat ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Triticum Aestivum L ◽  
Grain Weight ◽  
Control Measures ◽  
Kernel Number ◽  
Corn Borer ◽  
Lepidoptera Pyralidae ◽  
Spikelet Number Per Spike

The effect of European corn borer, Ostrinia nubilalis (Hübner), injury during the spring on yield and yield components of winter wheat, Triticum aestivum L. em Thell, was studied. Spike and grain characteristics of infested and uninfested culms were compared in three fields of ‘Florida 302’ winter wheat in eastern Georgia. Feeding on inner stem tissue by larvae killed the grain spike producing a “white head” symptom in wheat. Most larvae (95.2%) tunnelled in the peduncle which caused an average of 3.4% of spikes to be barren. Larval injury did not reduce spike length but did reduce grain weight per spike by 44.6% and grain weight per kernel by 41.9%. Kernel number per spike was reduced by 11.7% mostly because of a 9.9% reduction in kernel number per spikelet. Spikelet number per spike was reduced by 1.8%. Tunnelling by O. nubilalis larvae also reduced grain test weight and quality. These results indicated that a culm infestation of 10% or more would be necessary before control measures would be justified in winter wheat.

OCCURRENCE OF A TWO GENERATION STRAIN OF THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE), IN QUEBEC

1979 ◽  
Vol 111 (3) ◽  
pp. 233-236 ◽  
Author(s):  
D. G. R. McLeod ◽  
C. Ritchot ◽  
T. Nagai
Keyword(s):  
New York ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
First Generation ◽  
New York State ◽  
Corn Borer ◽  
York State ◽  
Two Generations ◽  
Critical Photoperiod ◽  
Lepidoptera Pyralidae

AbstractThere are now two strains of the European corn borer, Ostrinia nubilalis (Hübner), in Quebec. The strain normally found produces one generation while the more recently introduced strain produces two generations per year. Both strains have been characterized and compared with corn borer strains from Ontario and New York State. The two attributes of the recently introduced strain that promote the development of a second generation are (1) early emergence in the spring with less intense diapause and (2) a lower critical photoperiod for diapause induction. The latter characteristic allows pupation of first generation larvae. Field and laboratory tests on the pheromone response of adult male moths demonstrated that the origin of this recent introduction was New York State.

EVIDENCE OF A MALE SEX PHEROMONE IN THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (HÜBNER) (LEPIDOPTERA: PYRALIDAE)

1992 ◽  
Vol 124 (1) ◽  
pp. 113-116 ◽  
Author(s):  
Lucie Royer ◽  
Jeremy N. McNeil
Keyword(s):  
Sex Pheromone ◽  
Mating System ◽  
Mating Success ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Male Pheromone ◽  
Corn Borer ◽  
Male Sex Pheromone ◽  
Lepidoptera Pyralidae ◽  
Male Sex

AbstractEuropean corn borer males have hair pencils located ventrally on the 8th sternite and these are extruded when a male approaches a calling female. The fact that (i) antennectomized females mated significantly less than both intact controls and individuals subjected to other forms of surgery, and (ii) males with hair pencils removed had a significantly lower mating success than control males, suggests that a male pheromone is involved in the mating system of the European corn borer.

Central nervous processing of sex pheromones in two strains of the European corn borer Ostrinia nubilalis (Lepidoptera: Pyralidae)

1997 ◽  
Vol 200 (7) ◽  
pp. 1073-1087 ◽  
Author(s):  
S Anton ◽  
C Löfstedt ◽  
B S Hansson
Keyword(s):  
Ostrinia Nubilalis ◽  
Antennal Lobe ◽  
European Corn Borer ◽  
Minor Component ◽  
F1 Hybrids ◽  
Corn Borer ◽  
Response Characteristics ◽  
Neuronal Types ◽  
Lepidoptera Pyralidae ◽  
Staining Techniques

Antennal lobe neurones were investigated in the pyralid moth Ostrinia nubilalis using intracellular recording and staining techniques. Response characteristics of antennal lobe neurones from males in the so-called E and Z strains, in F1 hybrids and in parental backcrosses were studied. The antennal lobe of a male O. nubilalis comprises approximately 30 ordinary glomeruli and three enlarged glomeruli making up the macroglomerular complex (MGC). Receptor neurones enter the antennal lobe via the antennal nerve and arborize in single glomeruli. Intracellularly stained, pheromone-responding projection neurones in both parental strains arborized in different glomeruli within the MGC, irrespective of their response characteristics. Neurones were grouped according to their specificity to single pheromone components and to pheromone blends. Component-specific, blend-specific and generalist neurones were found. Specificity only occurred at low stimulus concentrations and disappeared as concentrations increased. Although all neuronal types were present in both pheromone strains and crossings, differences in abundance and sensitivity were found. In the parental strains, neurones responding to the major pheromone component and to the respective strain-specific blend were more abundant than neurones responding to the minor component and the blend produced by the other strain. Neurones investigated in ZxE hybrids responded similarly to those of E-strain males, whereas neurones in EZxZ paternal backcrosses responded similarly to those of Z males. In the hybrids and paternal backcrosses, hybrid-blend-specific neurones were present that were not found in parental-strain males.

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.

GENETICS OF DIAPAUSE INDUCTION AND TERMINATION IN THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE), IN SOUTHWESTERN ONTARIO

1978 ◽  
Vol 110 (12) ◽  
pp. 1351-1353 ◽  
Author(s):  
D. G. R. McLeod
Keyword(s):  
Growth Rate ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Diapause Induction ◽  
Corn Borer ◽  
Female Sex ◽  
Corn Borers ◽  
Lepidoptera Pyralidae ◽  
Male Sex ◽  
Diapause Incidence

AbstractGrowth rate, diapause incidence, and diapause intensity were different in two strains of corn borers found in southwestern Ontario. Crosses between these two strains demonstrated that growth rate was female sex linked while diapause incidence was male sex linked. The effect of these two characteristics on hybridization is discussed.

Survey of Parasitoids of the European Corn Borer (Lepidoptera: Pyralidae) in Southwestern Kentucky

1998 ◽  
Vol 33 (3) ◽  
pp. 256-260 ◽  
Author(s):  
D. R. Shanklin ◽  
D. W. Johnson ◽  
L. H. Townsend
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Abundant Species ◽  
The State ◽  
Corn Borer ◽  
Lepidoptera Pyralidae ◽  
The U.S

The European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Pyralidae), is a major maize pest throughout the maize-growing regions of the U.S. A survey was conducted to determine the parasitoids of European corn borer in southwestern Kentucky, the major maize producing region in the state. Two species, Lixophaga variabilis (Coquillett) (Diptera: Tachinidae) and Eriobus terebrans Gravenhorst (Hymenoptera: Ichneumonidae), were found. The most abundant species was the native L. variabilis. Only one E. terebrans was collected.

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.

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