Simple Technique for Storing Diapausing Southwestern Corn Borers (Lepidoptera: Pyralidae)1

1983 ◽  
Vol 76 (5) ◽  
pp. 1191-1192 ◽  
Author(s):  
Frank M. Davis
Keyword(s):  
Simple Technique ◽  
Corn Borers ◽  
Lepidoptera Pyralidae

scholarly journals Gene Flow Among Three Races of European Corn Borers (Lepidoptera: Pyralidae) in New York State

1991 ◽  
Vol 20 (5) ◽  
pp. 1356-1362 ◽  
Author(s):  
Thomas J. Glover ◽  
Janet J. Knodel ◽  
Paul S. Robbins ◽  
Charles J. Eckenrode ◽  
Wendell L. Roelofs
Keyword(s):  
New York ◽  
Gene Flow ◽  
New York State ◽  
York State ◽  
Corn Borers ◽  
Lepidoptera Pyralidae

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.

The impact of predation by red-winged blackbirds on European corn borer populations

1981 ◽  
Vol 59 (8) ◽  
pp. 1535-1538 ◽  
Author(s):  
Barry E. Bendell ◽  
Patrick J. Weatherhead ◽  
Robin K. Stewart
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Agelaius Phoeniceus ◽  
Population Estimates ◽  
Corn Borer ◽  
Corn Borers ◽  
Late Fall ◽  
Lepidoptera Pyralidae ◽  
The Impact

Population estimates of the European corn borer (Ostrinia nubilalis Lepidoptera: Pyralidae) were significantly positively correlated with distance from a blackbird roost near Beauharnois, Quebec. Gullet contents of male red-winged blackbirds (Agelaius phoeniceus) indicated that corn borers were consumed, particularly in the late fall. This predation appears to be responsible for lowering corn borer populations in standing corn the following year. It was estimated that the benefit provided by red-winged blackbirds through predation on com borers compensated for approximately 20% of the damage the birds did to standing corn.

POSTMATING AGE ESTIMATES FOR FEMALE EUROPEAN CORN BORER MOTHS, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE), USING TIME-RELATED CHANGES IN SPERMATOPHORES

1979 ◽  
Vol 111 (12) ◽  
pp. 1325-1335 ◽  
Author(s):  
W. M. Elliott ◽  
V. A. Dirks
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Second Generation ◽  
Light Trap ◽  
Age Groups ◽  
Volume Depletion ◽  
Corn Borer ◽  
Corn Borers ◽  
Lepidoptera Pyralidae ◽  
Modal Values

AbstractThe spermatophores in mated female European corn borers, Ostrinia nubilalis (Hübner), were shown to lose volume (depletion), change colour, and retract their spiral stalks over a period of about 7 days in such a way that postmating age could be estimated from their appearance. Colour changes and stalk retraction occurred more slowly in females that laid fertile eggs than in those that did not, but depletion occurred at the same rate. The average postmating age was estimated as 5.2, 6.3, 3.9, and 2.6 days for small light trap catches of first generation females in 1974, 1975, 1976, and 1977 and 4.4, 3.9, and 3.2 days for larger catches of second generation females in 1974, 1975, and 1977. Catches did not show decreasing numbers in successive age groups but tended to show modal values at < 1 day and at 4–6 days with only 1% living > 7 days. Redistribution of the moths from the date of capture back to the date of mating tended to give a unimodal curve of numbers on time in the 1975 second generation but not in 1974 or 1977. The unimodal curve of redistributed moths in 1975 was significantly different from a normal distribution. The redistribution showed that 58% of the moths mated within the heat unit interval when the second generation was expected to emerge, whereas only 38% of the actual catches occurred in this interval. Redistribution also showed that mating probably occurred even on cold nights when few moths were trapped, and conversely that on some warm nights with large catches most of the moths had mated on earlier nights.

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