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Effects of pruned and unpruned trap-logs of cypress on infestation and development of twoPhloeosinus species

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Abstract

The effect of prunedversus unpruned trap-logs ofCupressus sempervirens L. on infestation and gallery construction of the bark beetlesPhloeosinus armatus Reiter andP. aubei Perris (=bicolor Brulle) (Coleoptera: Scolytidae) was compared. Gallery density, total gallery length and cumulative density of penetration holes of both species, and the average gallery length ofP. armatus, were significantly higher in the unpruned logs. Pruning adversely affected brood development ofP. armatus. The data suggest that unpruned trap-logs should be used to control bothPhloeosinus spp. Differences in effectiveness between the two types of logs are assumed to be related to the slow rate of water loss from the pruned logs.

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Correspondence to Z. Mendel.

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Mendel, Z. Effects of pruned and unpruned trap-logs of cypress on infestation and development of twoPhloeosinus species. Phytoparasitica 11, 83–88 (1983). https://doi.org/10.1007/BF02980715

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Key Words

  • Cupressus sempervirens
  • Phloeosinus armatus
  • Phloeosinus aubei
  • effect of pruning