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Seasonal flight patterns of Ips typographus in southern Sweden and thermal sums required for emergence |
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| Authors: | Petter Öhrn Bo Långström Åke Lindelöw Niklas Björklund | |
| Institution: | Department of Ecology, Swedish University of Agricultural Sciences, , S750 07 Uppsala, Sweden | |
| Abstract: | ||
| Keywords: | Degree‐days flight activity pest management phenology phytosanitary measures Picea abies sister brood spruce bark beetle voltinism | |