Evaluation of Treatments in 2008 in MN and IA

Index of treatment success T = 1 - [Nt/Nt -1]*[nt -1/nt] Index of colony presence C = Nt/nt Map of treatment blocks Table with full information (view with Excel, see legend) Treatment EvaluationExplained

Nt and nt are average moth counts in pheromone traps in year t in the treatment block and in the control area around it, respectively. Treatment is done in year t. In the case of mating disruption or intensive trapping, evaluation is performed in year t +1. Thus, Nt and nt in equations for T and C are replaced by Nt+1 and nt+1. If values of nt-1 or nt are less than 0.05, then they are replaced by the value of 0.05 for estimating of T. Treatment is successful if T > 0.67; partially successful if 0.33 < T < 0.67; and unsuccessful if T < 0.33. If C is much >1, then the colony is still present and may require additional treatments.

# Block Name State County Agent Dose Area,ac T T2 C PPA

1 Grand Portage MD MN Cook MD 15g 11999 0.50 0.92 0.89 -1 2 Illgen City MN Lake MD 6g 16848 0.90 0.91 0.49 49 3 Little Marais MN Lake MD 6g 28680 0.95 0.97 0.27 51

Blocks outside of STS action zone

 #  Block Name                    State County         Agent  Dose    Area,ac    T      T2       C    PPA 

 4  Grand Marais                  MN    Cook           MD     15g     10098     0.99    0.97    0.20   59
 5  Marr Island                   MN    Cook           MD     6g      12365     0.98    0.99    0.30   61
 6  MineralCntrUpdate             MN    Cook           Btk    24BIUx2  4959     0.98     ---    0.13   63

PPA = Potential Problem Area, detected by the Decision Algorithm from previous year data.
Treatment agents: Btk (or Bt, BT) = Bacillus thuringiensis var. kurstaki;
MD (or PF) = Mating disruption with pheromone flakes containing disparlure;
NPV = virus, preparation Gypchek;
DIM = Dimilin (=diflubenzuron);
Trap = Mass trapping;

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    For more information, please contact Patrick Tobin or Andy Roberts
    Maintained By Jiang Wu