Seasonal History of the European Corn Borer at Florence, South Carolina1

1969 ◽  
Vol 62 (5) ◽  
pp. 1071-1075 ◽  
Author(s):  
John A. Durant
Keyword(s):  
European Corn Borer ◽  
Corn Borer ◽  
History Of ◽  
Seasonal History

Some Factors Influencing the Occurrence and Size of the Midsummer Flight of the European Corn Borer, Ostrinia nubilalis (Hbn.) (Lepidoptera: Pyralidae), in Southwestern Ontario

1959 ◽  
Vol 91 (12) ◽  
pp. 798-806 ◽  
Author(s):  
J. A. Mutchmor
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Economic Value ◽  
Light Trap ◽  
The United States ◽  
Corn Borer ◽  
Collection Data ◽  
History Of ◽  
Lepidoptera Pyralidae ◽  
Seasonal History

In southwestern Ontario the European corn borer, Ostrinia nubilalis (Hbn.), produces two flights annually. The first flight, beginning in June, consists of moths from larvae that have overwintered. The midsummer, or second, flight begins late in July or early in August, and its moths are the progeny of the first flight. Until about 20 years ago the borer produced only one annual flight and was thought to be univoltine. The change in the seasonal history of the borer in Ontario was described by Wressell (1953) and Miller (1956). The literature describing similar changes in parts of the United States has been reviewed by Lees (1955) and Everett et al. (1958). Wressell (1953) summarized light trap collection data of moth flights in the Chatham, Ontario, area for the years 1932 to 1951. The summary includes the percentage of the moths that were from the midsummer flight, and it is evident that the size of this flight varies greatly from year to year. Aside from its intrinsic interest, it would be of some economic value to know what governs the size of the midsummer flight. This is a report of studies undertaken to examine the case, and to relate the findings to the larger problem of why the borer now produces a second flight where formerly it produced only one.

FURTHER OBSERVATIONS ON THE CHANGES TAKING PLACE IN THE CORN BORER POPULATION IN WESTERN ONTARIO

1947 ◽  
Vol 79 (5) ◽  
pp. 81-83 ◽  
Author(s):  
Geo. Wishart
Keyword(s):  
European Corn Borer ◽  
Corn Borer ◽  
Important Relationship ◽  
Two Generations ◽  
History Of ◽  
Consistent Increase ◽  
Pyrausta Nubilalis ◽  
Seasonal History

The seasonal history of an insect has an important relationship to the success or failure of any efforts to usr parasites in its control. In the work on parasites of thr European corn borer, Pyrausta nubilalis Hubn., over a period of years, the writer has had an opportunity to observe the changes which have taken place in the seasonal history of this insect in Western Ontario. It was shown by the writer (Wislwt, 1942, 1944) that there was a gradual and rather consistent increase in the proportion of the population which had two generations instead of one. The present paper presents further data pertinent to this subject.

A Technique for Distinguishing Virgin and Mated Males of Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae)

2009 ◽  
Vol 44 (3) ◽  
pp. 264-275 ◽  
Author(s):  
Yang Hu ◽  
D. A. Andow
Keyword(s):  
Error Rate ◽  
Ostrinia Nubilalis ◽  
Scoring System ◽  
European Corn Borer ◽  
Male Mating ◽  
Mating Status ◽  
Corn Borer ◽  
Mating History ◽  
History Of

Studies on the mating history of male Lepidoptera are generally lacking because of difficulties in determining male mating status. In previous studies, presence/absence of pigmented fluids inside the male primary simplex have been used successfully for determining mating status. However, males of European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae), have creamy white fluids in the primary simplex instead of pigmented fluids, so presence/absence of pigmented fluids inside the primary simplex cannot be used to assess mating status in this species. We developed a scoring system for the fluids inside the primary simplex that allowed us to classify O. nubilalis male mating status and the timing of copulation. The scoring system relies on differences in the fluids in the 1st, 2nd and 7th segments of the primary simplex. Males known to be virgins, mated <1d previously and mated >1d previously could be distinguished with a 6.3% error rate. The method was verified on 41 males in a blind study, with 100% accurate classification of the males.

Seasonal-History Studies on the European Corn Borer in Michigan

1931 ◽  
Vol 24 (2) ◽  
pp. 372-379 ◽  
Author(s):  
G. T. Bottger ◽  
V. F. Kent
Keyword(s):  
European Corn Borer ◽  
Corn Borer ◽  
Seasonal History
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