International Journal of Pest Management (1998) 44, 75-79

Herman Helsen, Fredy Vaal and Leo Blommers (1998)
Phenology of the common earwig Forficula auricularia L. (Dermaptera: Forficulidae) in an apple orchard
International Journal of Pest Management 44 (2), 75-79
Abstract: Observational data taken over 13 years, on the phenology and the abundance of the first brood of the common earwig, Forficula auricularia L., in a Dutch apple orchard were analysed. The results are used to indicate a fixed sampling moment for this predator. The fourth instar nymphs emerged between 12 June and 10 July, and the adult stage was reached between 8 and 30 July. The observed phenology, and the number of earwigs in shelter traps, correlated well with the temperature sum in day-degrees above a thermal threshold of 6 C, accumulated from 1 January. Maximum numbers of earwigs could be trapped in the trees when the nymphs of the first brood entered the fourth instar, generally between 600 and 750 day-degrees.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Leo H.M. Blommers

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
Forficula auricularia (predator)