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Natural enemies and their impact on overwintering codling moth populations laspeyresia pomonella l. lepidoptera tortricidae in south sweden


Natural enemies and their impact on overwintering codling moth populations laspeyresia pomonella l. lepidoptera tortricidae in south sweden



Journal of Applied Entomology 103(1): 46-55



ISSN/ISBN: 0931-2048

Overwintered larvae, and pupae of the codling moth were scraped from apple tree trunks in spring 1981-1984 and investigated for parasites and pathogens. The total mortality ranged from 49.6 to 77.8%. Elodia morio Fall. (Tachinidae) was the most common species among the parasites that emerged during the years (50.6%). Possible reasons why a higher percentage of E. morio were found in this investigation as compared with other European countries are discussed. Pristomerus vulnerator Panz. (Ichneumonidae) and Ascogaster quadridentatus Wesm. (Braconidae) were the second most common (22.9 and 14.7%, respectively). Of the cadavers collected in 1981-1982, the fungal pathogens Beauveria bassiana (Bals.) Vuill. and Paecilomyces farinosus (Dicks. ex Fr.) Brown et Smith accounted for an infection rate of 34.4 and 29.5%, respectively. Totally 26.2% of the experimentally exposed overwintering codling moth larvae were taken by birds. Although based on a small number of samples, birds showed a clear tendency to density-dependent predation.

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Accession: 005958216

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Related references

Natural enemies and their impact on overwintering codling moth populations (Laspeyresia pomonella L.) (Lep., Tortricidae) in South Sweden. Zeitschrift für Angewandte Entomologie 103(1): 46-55, 1987

Natural enemies and their impact on overwintering codling moth populations (Laspeyresia pomonella L.) (Lep., Tortricidae) in south Sweden. Journal of Applied Entomology 1031: 46-55, 1987

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