Time Relationship of Spring Brood Codling Moth Emergence, and Subsequent Worm Entry1

Webster, R. L.; O'Neill, W. J.

doi:10.1093/jee/35.6.806

Cited by 2 publications

(1 citation statement)

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“…Timing of sprays by temperature sums must therefore be adjusted by postponing the recommended date for spraying by the number of days on which dusk temperatures do not reach this threshold of 15°C. Some further adjustment to timing may be necessary to account for any retardation in egg development since this also varies with temperature (Shelford, 1927;Webster and O'Neill, 1942;de Jong and Post, 1963;Hagley, 1976). Laboratory data from the studies of the above authors gave a range of 80-104 day-degrees above 10°C from oviposition to egg hatch for C. pomonella; this represents 10-26 days during the period of our observations.…”

Section: Comparison Of Dates Estimated From Temperature Sums With Datmentioning

confidence: 78%

Light‐trap Catches of Fruit Tortricid Moths in Kent, 1964–74, and Associated Temperature Sums

Low

Baker²,

Ludlam

1978

Plant Pathology

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SUMMARY Light‐trap catches of five tortricid species were recorded at orchard sites in Kent over an 11‐year period. The dates on which moths of Hedya nubiferana (Haw.), Cydia pomonella (L.) and Archips podana (Scop.) were caught in light traps were strongly correlated with accumulated temperatures in day‐degrees above a base of 8°C. The correlation was less good for catches of Pandemis heparana (Denis & Schiff.) and it was slightly better for those of Cydia pomonella above 10°C than above 8°C. The data were insufficient to calculate temperature sums for catches of Adoxophyes orana (Fisch. v. Rösl.). Moth catches of all five species showed differences between years in the timing of first and second generations. The dates of first catches are compared with dates estimated from the following temperature sums: for H. nubiferana 226 day‐degrees above 8°C, for C. pomonella 268 day‐degrees above 8°C and 149 day‐degrees above 10°C, for Archips podana 326 day‐degrees above 8°C and for P. heparana 386 day‐degrees above 8°C. In the 11‐year period, estimated dates of first catch were within ± 5 days of first actual catch of moths in light traps in nine years for C. pomonella, eight years for H. nubiferana and A. podana, but only five years for P. heparana.

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Section: Comparison Of Dates Estimated From Temperature Sums With Datmentioning

confidence: 78%

Light‐trap Catches of Fruit Tortricid Moths in Kent, 1964–74, and Associated Temperature Sums

Low

Baker²,

Ludlam

1978

Plant Pathology

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Timing Sprays for Codling Moth (Lepidoptera: Olethreutidae) Control on Apple

Hagley

1973

Can Entomol

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Effective codling moth control was obtained by timing the application of insecticidesito coincide with the period of greatest larval emergence in the orchard. This occurred 6–10 days after first emergence and the latter could be predicted by heat unit summations. In 1971 and 1972 144 and 137 degree-days accumulated from the date on which the first male moth was taken in pheromone traps and the first larvae emerged, respectively.

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Time Relationship of Spring Brood Codling Moth Emergence, and Subsequent Worm Entry1

Cited by 2 publications

References 0 publications

Light‐trap Catches of Fruit Tortricid Moths in Kent, 1964–74, and Associated Temperature Sums

Light‐trap Catches of Fruit Tortricid Moths in Kent, 1964–74, and Associated Temperature Sums

Timing Sprays for Codling Moth (Lepidoptera: Olethreutidae) Control on Apple

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