New Zealand Journal of Crop and Horticultural Science abstracts
Dispersal of Epiphyas postvittana (Walker)
and Planotortrix octo Dugdale (Lepidoptera: Tortricidae)
at a Canterbury, New Zealand orchard
D. M. SUCKLING1
J. F. BRUNNER2
G. M. BURNIP1
J. T. S. WALKER3
1The Horticulture and Food Research Institute
of New Zealand
P.O. Box 51
Lincoln, New Zealand
2Fruit Tree Research Center
Wenatchee
Washington State
United States
3Havelock North Research Orchard
Private Bag 1401
Havelock North, New Zealand
Abstract Mated pairs of
Epiphyas postvittana
and
Planotortrix octo were marked and released at a point source
in a young, 40 ha orchard. Port wine bait traps and pheromone traps along eight
radiating transects were checked daily. In 1988, recapture of
E.
postvittana was 0.24% of females in bait traps, 0.23% of males in bait
traps, with 3.4% of males in pheromone traps. In 1990, recapture of both male
and female
E. postvittana was more successful (12.2% of females in bait
traps, 4.4% of males in bait traps, and 12.4% of males in pheromone traps). No
marked males and only one marked female
P. octo were recaptured in
bait traps, although 5.1% of males were recaptured in pheromone traps. The
maximum dispersal distance recorded for
E. postvittana males was
600 m, but 80% of released males were recaptured within 100 m. For female
E. postvittana, the maximum distance recorded was 275 m, with 99%
dispersing 100 m or less. Male
P. octo exhibited similar dispersal
capability to male
E. postvittana, with a maximum of 400 m recorded.
Wild male and female
E. postvittana were very abundant, with 4629 males
caught in pheromone traps and 615 males caught in bait traps, with 948 females
caught in bait traps.
Keywords dispersal; Tortricidae; leafroller; trapping;
recapture; Epiphyas postvittana; Planotortrix
octo
New Zealand Journal of Crop and Horticulrural Science, 1994, Vol. 22:
225-234
0114-0671/94/2203-0225 $2.50/0 (c) The Royal Society of New Zealand
1994
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