USE OF STANDARD TEMPERATURE THRESHOLDS AND PHENOLOGICAL PREDICTION FOR THE EUROPEAN CORN BORER (<i>OSTRINIA NUBILALIS</i> HÜBNER) IN ALBERTA

Kelker, Douglas; Lee, Dennis A.; Spence, John R.

doi:10.4039/ent1221247-11

Cited by 12 publications

(21 citation statements)

References 27 publications

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“…The statistical relationship between peak numbers of egg masses per stalk and larvae per stalk is similar to the results from other studies on trapping European corn borer adults on corn (Sappington and Showers 1983;Kelker et al 1990;Palaniswamy et al 1990), where trapping adults is suggested as only a guideline for the initiation of egg mass surveying.…”

Section: Discussionsupporting

confidence: 86%

FECUNDITY OF LYGUS LINEOLARIS (HETEROPTERA: MIRIDAE)

Gerber

1995

Can Entomol

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Section: Discussionsupporting

confidence: 86%

FECUNDITY OF LYGUS LINEOLARIS (HETEROPTERA: MIRIDAE)

Gerber

1995

Can Entomol

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“…1). Similarly, Kelker et al (1990) used a biofix date of March 1 to estimate degree day accumulations for various life stages of European cornborer, Ostrinia nubilalis (Hüb-ner) in Alberta, while Ayre and Lamb (1990) used a biofix date of April 1 when measuring the number of degree days accumulated to 50 % adult emergence for nine species of noctuid cutworms in Manitoba, although species varied in overwintering stage from egg to pupa.…”

Section: Methodsmentioning

confidence: 99%

“…min daily temp)/2 -LTT] with a LTT of 6°C. Next, we calculated degree days using the double sine model with a LTT of 6°C and an upper threshold temperature of 32°C (vertical cutoff) (see Kelker et al 1990, University of California Natural Resources' website, http://www.ipm.ucdavis.edu/WEATHER/ index.html). Our biofix date, the date when we began to accumulate degree days each year, was selected as March 1st, since prior to this date temperatures were too low for degree days to accumulate using either method of calculation.…”

Section: Methodsmentioning

confidence: 99%

Predicting adult emergence of Dakota skipper and Poweshiek skipperling (Lepidoptera: Hesperiidae) in Canada

Dearborn

Westwood

2014

J Insect Conserv

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Dakota skipper (Hesperia dacotae Skinner) andPoweshiek skipperling (Oarisma poweshiek Parker) (Lepidoptera: Hesperiidae) are endemic prairie species that are threatened in Canada. Surveys during the brief adult flight period are necessary to quantify population sizes, but dates of adult emergence vary widely from year to year (up to 24 days) and populations are geographically distant from one another (150-250 km). To predict adult emergence of H. dacotae and O. poweshiek, we used local weather station data to calculate the number of degree days accumulated between March 1 and adult emergence using two different models in seven different years between 2002 and 2013. We also compared the number of degree days accumulated at the soil surface where larvae and pupae reside to those accumulated using weather station data. We recommend that surveys for Dakota skipper begin when degree day accumulations (from weather stations) reach a threshold of 575 (standard model) or 600 (double sine model) in the south central portion of Manitoba and 550 (standard model) or 575 (double sine model) in the southwest region of Manitoba. For Poweshiek skipperling surveys should be considered after degree day accumulations reach 575 (standard model) or 625 (double sine model). Degree days accumulated at the soil surface were 20-30 % greater than those calculated using weather station data in Dakota skipper sites, and 1-12 % greater in Poweshiek skipperling sites. Using our models, we predicted adult emergence to within 48 h of emergence in 2011, 2012 and 2013.

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“…A linear relationship has the advantage of simplicity and validity in most cases (Matteson and Decker ; Kelker et al. ). The variability in development has also been represented using different approaches (Gilbert et al.…”

Section: Introductionmentioning

confidence: 99%

Development and validation of a phenological model for the univoltine European corn borer

Schaub

Breitenmoser

Derron

et al. 2016

J Applied Entomology

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Biological control of a univoltine race of European corn borer, Ostrinia nubilalis Hübner (Lepidoptera: Crambidae), by Trichogramma in Switzerland is currently timed according to repeated, semi‐field observations of the post‐diapause development of the pest at one site. We developed a phenology model with the aims of replacing this costly labour practice and by considering the Swiss landscape. Observations collected over 29 years were used for model calibration and validation. We parameterized a time‐varying distributed delay model based on published laboratory observations of development durations at constant temperatures. The model was driven with hourly temperature recordings beginning on January 1. The calibration of the mean development rates and their variations was based on semi‐field data of larval and pupal development. The model, with its calibrated parameters and their variations, allowed the simulation of mean predictions and prediction intervals. We validated the model predictions of emergence with flight data (obtained via light traps) from several sites in western and northern Switzerland. The simulated mean emergence was 6.9 degree‐days earlier than the observed flight at the calibration sites and only 0.5 degree‐days earlier than the observed flight at other sites. Our simulation of pupation explained half of the variation in emergence time, whereas semi‐field observations of pupation explained three‐quarters of this variation. Our model simulations are not subjected to the local potential biases. Simulation errors from a year with an extremely dry spring were explained by the lack of consideration of humidity by the model. Our simulations provide a valid and less labour‐intensive alternative to observations for timing biological control in the maize‐growing areas of Switzerland and likely other areas of Europe.

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USE OF STANDARD TEMPERATURE THRESHOLDS AND PHENOLOGICAL PREDICTION FOR THE EUROPEAN CORN BORER (OSTRINIA NUBILALIS HÜBNER) IN ALBERTA

Cited by 12 publications

References 27 publications

FECUNDITY OF LYGUS LINEOLARIS (HETEROPTERA: MIRIDAE)

FECUNDITY OF LYGUS LINEOLARIS (HETEROPTERA: MIRIDAE)

Predicting adult emergence of Dakota skipper and Poweshiek skipperling (Lepidoptera: Hesperiidae) in Canada

Development and validation of a phenological model for the univoltine European corn borer

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