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 fectiveness 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 fectiveness 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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