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2. Updated 2023 from:
Legner, E. F. 1961. An ecological study of some
foliage-feeding insects on young nonbearing apple trees in Wisconsin. Ph.D. Thesis, University of Wisconsin,
Madison. 139 pp. Title Page Acknowledgments Contents Tables & Figures Introduction SUMMARY The years 1959 and 1960 were
phenologically similar, judging from occurrence of insects in the orchard and
development of the trees. Seventeen
species in nine families of Lepidoptera were collected from the apple orchard
in 1959 and 33 species in 19 families in 1960. All species except Dichomeria liguella (Hbn.),
collected in 1959, were present in 1960.
Four species occurred in two generations. All other species had a single generation. See Page 43 for
all species present. Tree variety, treatment, and year
apparently influenced the number of individuals and species present. The three primary destructive species were
significantly more abundant on Red Delicious than on Cortland
apple varieties, and there were more individuals collected per tree in 1960
than in 1959. There were
significantly fewer eye-spotted bud moth larvae and pupae in the treated
section over both varieties in 1959 only.
The distribution of eye-spotted bud moth larvae became uniform between
the four orchard sections during the latter part of September 1960. Fruit-tree leaf roller larvae and pupae
apparently occurred at higher numbers in the check section. There were no significant differences
between treatments for the red-banded leaf roller in either year. Apple aphids were more abundant in the
check section of the orchard in 1959, but were distributed at random over all
sections in 1960. |
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