at this site the two winters had twelve vs. four days
of 10 C or less, respectively. The observed changes in fly populations
from year to year present difficulties in preparing management
plans for this pest, especially when efficient and costeffective
IPM tools are lacking, but winter conditions may ultimately
be used to provide a risk ranking for the coming season’s
level of pest pressure from D. suzukii. In higher pressure years
where D. suzukii populations increase earlier in the season, effective
control will require more sprays and tighter spray intervals than
years where population increases are delayed. In addition, the
amount and timing of rainfall will impact the effectiveness of insecticides
and the need for re-application to keep fruit protected.
The development of reliable trapping (Lee et al., 2013) and larval
detection techniques will aid growers, scouts, and extension agents
in determining the timing and magnitude of the pest population,
and the performance of control programs.
at this site the two winters had twelve vs. four days
of 10 C or less, respectively. The observed changes in fly populations
from year to year present difficulties in preparing management
plans for this pest, especially when efficient and costeffective
IPM tools are lacking, but winter conditions may ultimately
be used to provide a risk ranking for the coming season’s
level of pest pressure from D. suzukii. In higher pressure years
where D. suzukii populations increase earlier in the season, effective
control will require more sprays and tighter spray intervals than
years where population increases are delayed. In addition, the
amount and timing of rainfall will impact the effectiveness of insecticides
and the need for re-application to keep fruit protected.
The development of reliable trapping (Lee et al., 2013) and larval
detection techniques will aid growers, scouts, and extension agents
in determining the timing and magnitude of the pest population,
and the performance of control programs.
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