New Zealand Plant Protection 55 (2002): 85-89
Species composition and abundance of leafrollers in a Canterbury pine plantation
E.G. Brockerhoff, H. Jactel, A.C. Leckie and D.M. Suckling
ABSTRACT
Several leafroller species (Tortricidae) are known to occasionally cause considerable defoliation in Pinus radiata plantation forests. We conducted pheromone trapping for five indigenous species, Ctenopseustis herana, Ctenopseustis obliquana, Planotortrix excessana, Planotortrix notophaea and Planotortrix octo, and the exotic Epiphyas postvittana, to determine their abundance in 20 P. radiata stands in Eyrewell Forest, North Canterbury. Trapping from December 2001 to February 2002 indicated that E. postvittana and C. obliquana were very abundant (with mean catches of 0.77 and 0.44 moths/trap/day, respectively) while the other species were rarely caught. Results for the native leafrollers differ considerably from those reported from other plantation forests and other habitats in Canterbury, such as apple orchards, where P. octo and C. herana are generally more common.
Keywords: Tortricidae, Ctenopseustis spp., Planotortrix spp., Epiphyas postvittana, Pinus radiata, plantation forest.
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