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Project Leader(s): H. Reissig, R. Straub,
and A. Agnello, Department of Entomology, NYSAES, Geneva, NY 14456
Cooperator(s): Richard Endres, Todd Furber,
Ed and Seth Burnap, Lynoaken Farms, Glendale Farms,
Type of grant: Research
Project location(s): Wayne County, NY
and Orleans County, NY
Abstract: This study showed that resistance
to organophosphates remained relatively stable in the field populations of OBLR
during the 3 years of the study, despite the absence of sprays of these materials.
The control of OBLR in the soft pesticide programs was generally better than
that obtained by growers in their standard pesticide treatments. However, adequate
control of plum curculio was not obtained in most of the blocks and at the end
of the study, damage was observed even in blocks that were completely free of
this pest during the first season. These results showed that adequate control
of the curculio cannot be maintained for multiple seasons without using special
control sprays even in blocks that would not be considered to be at risk from
this pest. This soft insecticide program did not provide adequate control of
internal lepidoptera in some of the blocks for multiple seasons, although control
of apple maggots was acceptable. Foliar pests such as tentiform leafminers,
green apple aphids, white apple leafhoppers, and mites were not serious problems
in the soft pesticide blocks. Tarnished plant bug damage was generally similar
in grower's standard programs and the soft pesticide blocks. Secondary pests,
such as rosy apple aphids and the San Jose Scale were problems in some of the
soft pesticide blocks. However, the overall insect damage in the standard and
soft pesticide was fairly similar during all seasons of the 3 year study, except
in one orchard, which suffered severe damage from curculio and internal lepidoptera.
The costs of insecticides applied in the standard and soft pesticide programs
were fairly similar.
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