Predicting the Size of European Corn Borer Infestations (Ostrinia nubilalis Hbn.)

1963 ◽  
Vol 95 (12) ◽  
pp. 1285-1292 ◽  
Author(s):  
C. A. Barlow
Keyword(s):  
Regression Analysis ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
First Generation ◽  
Light Trap ◽  
Predictive Equation ◽  
Partial Regression ◽  
Corn Borer ◽  
Average Rainfall ◽  
Kent County

AbstractA method of forecasting the size of first-generation or summer infestations of Ostrinia nubilalis in Kent County, Ontario, is described. A function is derived from partial regression analysis relating the estimated size of the expected summer infestation to (1) the number of females caught in a light-trap during the first or spring flight, and (2) average rainfall per day during the first flight. The function explains 94% of the observed variation in estimated size of first-generation infestations in this area between 1947 and 1961. A means of categorizing the estimated size of the predicted infestation based on the frequency distribution of previously estimated infestations is also described. Methods of sampling and estimating population size and the applicability of the predictive equation to other environments are discussed.

SOME FACTORS DETERMINING THE SIZE OF INFESTATIONS OF THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (HBN.) (PYRALIDAE: LEPIDOPTERA)

1963 ◽  
Vol 41 (6) ◽  
pp. 963-970 ◽  
Author(s):  
C. A. Barlow ◽  
H. B. Wressell ◽  
G. R. Driscoll
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
First Generation ◽  
Light Trap ◽  
Daily Temperature ◽  
Partial Regression ◽  
Corn Borer ◽  
Average Rainfall ◽  
Unit Increase ◽  
Kent County

Partial regression analysis of the indicial size of first generation, or summer. infestations of Ostrinia nubilalis estimated from light-trap matches and surveys of cornfields in Kent County, Ontario, suggested that the size of infestations was largely determined by three factors: (1) the number of females in the first flight, (2) average rainfall per day during the first flight, and (3) average daily temperature during the first flight. The first factor was apparently most important, rainfall had less effect, and the influence of temperature was evidently negligible. Estimated size of first generation infestations increased by 3.7 individuals for every unit increase in the number of females trapped during the first flight, by 12.2 individuals for every 0.01 in. of rain which fell during the first flight, and by 1.3 individuals for every 1°-F increase in mean daily temperature during the first flight. The regression explained 94% of the variation in estimated size of summer infestations of the corn borer between 1947 and 1961. A hyperbolic relationship was implied between the number of females in the first flight and the number of progeny per female in first generation infestations.

FACTORS AFFECTING THE TEMPORAL DISTRIBUTION OF THE SPRING FLIGHT OF THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE)

1981 ◽  
Vol 113 (5) ◽  
pp. 433-439 ◽  
Author(s):  
D. G. R. McLeod
Keyword(s):  
Multiple Regression ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Regression Line ◽  
Light Trap ◽  
Temporal Distribution ◽  
Weather Factors ◽  
Average Deviation ◽  
Corn Borer ◽  
Emergence Pattern

AbstractA multiple regression analysis was used to establish which weather factors and population parameters were important in determining the emergence pattern of the spring flight of the European corn borer, Ostrinia nubilalis (Hbn.), as measured by light trap catches. Equations which estimated the slope and intercept of a line representing the probit of cumulative percentage emergence vs. degree days had as independent variables the intercept of the previous year’s regression line and the average temperature for the preceding September, December, February, and April. A comparison of methods used to estimate the emergence pattern showed that the average deviation of the average date method was 5.0 days, the average slope and intercept method 2.8 days, and multiple regression method 1.6 days.

A METHOD OF DETECTING OVIPOSITION IN EUROPEAN CORN BORER MOTHS, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE), AND ITS RELATION TO SUBSEQUENT LARVAL DAMAGE TO PEPPERS

1978 ◽  
Vol 110 (5) ◽  
pp. 487-493 ◽  
Author(s):  
W.M. Elliott ◽  
R.J. McClanahan ◽  
J. Founk
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Second Generation ◽  
Linear Equations ◽  
Light Trap ◽  
Yellow Band ◽  
Corn Borer ◽  
Green Pepper ◽  
Lepidoptera Pyralidae

AbstractThe formation of a yellow band inside the stalk of each ovariole was a good indicator that a female European corn borer had laid eggs. The absence of these bands was less reliable as an indicator that no eggs had been laid, probably due to the time taken for the bands to form. The numbers of moths accumulating in a light trap over a week at Harrow, Ontario, and the numbers of females estimated to have laid eggs correlated significantly with the numbers of larvae developing in nearby green pepper plots 3, 4, and 5 weeks later during second generation flights. This enabled linear equations for forecasting pepper damage to be developed, in which the dissection data was more useful than the total moth catch alone.

EFFECTS OF A NATURAL BIVOLTINE STRAIN OF THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE), ON GRAIN CORN YIELDS IN SOUTHWESTERN ONTARIO, 1973–77

1981 ◽  
Vol 113 (7) ◽  
pp. 585-591
Author(s):  
W. H. Foott ◽  
P. R. Timmins
Keyword(s):  
Moisture Content ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
First Generation ◽  
Second Generation ◽  
Yield Losses ◽  
Corn Borer ◽  
Lepidoptera Pyralidae

AbstractA 5-year study of a bivoltine strain of the European corn borer, Ostrinia nubilalis (Hübner), showed that first-generation moths deposited more eggs on early-planted corn, whereas second-generation moths oviposited more frequently on late-planted corn. The second generation was much larger than the first generation and caused the greater reduction in yield, regardless of whether the yields were based on physiological losses or a combination of physiological losses and dropped ears. It was shown that delay of harvest beyond the time that moisture content of the corn was sufficiently low for machine harvesting could result in severe yield losses from broken stalks and dropped ears during autumn storms.

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.

PHENOLOGY OF THE EUROPEAN CORN BORER (OSTRINIA NUBILALIS) IN ALBERTA

1986 ◽  
Vol 118 (10) ◽  
pp. 943-956 ◽  
Author(s):  
Dennis A. Lee ◽  
John R. Spence
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
First Generation ◽  
Dry Mass ◽  
Degree Days ◽  
Corn Borer ◽  
Two Populations ◽  
Pupal Mass ◽  
Colonizing Ability ◽  
Transplant Experiments

AbstractDifferences in phenology were observed between two populations of Ostrinia nubilalis (Hbn.) in Alberta. In the South Saskatchewan River valley, borers pupated and emerged 3–6 days earlier than on the plains. This was not simply a function of different microclimates because median pupation occurred at 331 degree-days (DD) for plains populations and at 490 DD for valley populations. First-generation flight extended from the last week in June until the 1st week in August. Flight peaks in 1983 occurred on 8 July in the valley and on 14 July on the plains. Flight was delayed in 1984 by cold nightly temperatures. In 1983 valley populations had a partial second generation, with a flight peak in late August. Mean pupal mass was significantly less for plains populations than valley populations. Transplant experiments demonstrated that these differences reflected mainly environmental influences. During spring 1984, mean larval mass in the two populations did not differ until early June, when both mean wet and dry mass of valley larvae increased significantly but those of plains larvae did not change. This variability of phenotypes contributes to the colonizing ability of the European corn borer.

scholarly journals The effect of insecticides on the total percentage of Ostrinia nubilalis Hbn attack on maize hybrids

Genetika ◽  
2020 ◽  
Vol 52 (1) ◽  
pp. 351-365
Author(s):  
Snezana Gosic-Dondo ◽  
Dragan Grcak ◽  
Milosav Grcak ◽  
Danijela Kondic ◽  
Djuradj Hajder ◽  
...  
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
First Generation ◽  
Plant Protection ◽  
Control Group ◽  
Corn Borer ◽  
Protection Effect ◽  
Maize Hybrids ◽  
Total Percentage ◽  
Active Substances

The objective of the paper was to determine the effect of insecticides on the development of the European corn borer (Ostinia nubilalis Hbn) and the effect of damage in six maize hybrids of different maturity groups. The research involved the following hybrids: ZP 427, ZP 434, ZP 555, ZP 600, ZP 606 and ZP 666. In the field trial, insecticides were applied in two terms, during the flight of O. nubilalis first generation and during the flight of second O. nubilalis generation. We used Fobos EC insecticide and a combination of Match 050 EC + Nurelle D insecticides, whose active substances are different. The active substance in Fobos EC insecticide is bifenthrin 100 g l-1, in Match 050 EC lufenuron 50 g l-1 and, in Nurelle D insecticide, the active ingredient is a combination of chlorpyrifos 500 g l-1 and cypermethrin 50 g l-1. The damage inflicted on plants was assessed in July and September. Fobos insecticide had the best plant protection effect, after its use, the arithmetic mean of the total attack percentage of all hybrids was approximately 81.62% while in the control group, it was approximately 91.72%.

scholarly journals Prevalence rates of Trichogramma evanescens (Westwood) in Ostrinia nubilalis (Hübner) population in the south of russia in 2013-2018

2020 ◽  
Vol 18 ◽  
pp. 00012
Author(s):  
Inna Grushevaya
Keyword(s):  
Population Dynamics ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
First Generation ◽  
Second Generation ◽  
Prevalence Rates ◽  
Mortality Factors ◽  
Trichogramma Evanescens ◽  
Corn Borer ◽  
Two Generations

The European corn borer Ostrinia nubilalis (Hübner) is a dangerous corn pest – a convenient object for studying population dynamics and assessing various pest mortality factors. The mortality of European corn borer’s eggs by the natural parasite population Trichogramma evanescens (Westwood) was estimated in 2013–2018 in the Gulkevichsky district of the Krasnodar Territory. Two generations of the European corn borer are developing in the Krasnodar Territory. Often pest’s first generation of is not infected with the parasite. When monitoring the abundance of the second generation, even in years with a low abundance of the European corn borer, infected phytophage eggs are found in the crops of grain corn. Infection of eggs of the second-generation European corn borer in 2013-2018 ranged from 0.26 to 69.55 eggs / m2, with an average of 37.53 eggs / m2.

THE AGE OF FEMALE EUROPEAN CORN BORER MOTHS, OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE), IN THE FIELD AND TESTS OF ITS USE IN FORECASTING DAMAGE TO GREEN PEPPERS

1982 ◽  
Vol 114 (9) ◽  
pp. 769-774
Author(s):  
W. M. Elliott ◽  
J. D. Richardson ◽  
J. Founk
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Light Trap ◽  
Flight Period ◽  
Light Traps ◽  
Significant Drop ◽  
Corn Borer ◽  
Lepidoptera Pyralidae ◽  
The Mean ◽  
New Recruits

AbstractThe mean post-mating age of mated female moths of the European corn borer, Ostrinia nubilalis (Hübner), from light traps varied from 3.4 to 5.2 days during the June–September flight period at Harrow, Ontario, in a manner consistent with assignment of moths to 3 generations per year. At the beginning of the first generation the mean age was 3.66 days and rose to 5.21 before flights ceased. At the beginning of the second generation the mean age was 3.39 days and rose to 4.47 days. A third generation could be detected in early September by a significant drop in age and an increase in virgin females. The average age of mated females was negatively correlated with the proportion of virgin females in the same week (r = −0.648, P = 0.02), indicating that about 40% of the variance in age of mated females was associated with emergence of new recruits to the population. Females collected with a sweep net from their day time resting places in weeds were either the same age or older than those from the light trap. The mean age of moths from light traps was found to be not meaningful when it was tested as a factor in forecasting damage caused by their progeny in green peppers 3–5 weeks later.

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