Evaluation of Treatments in 1997 in VA, WV, and NC

  
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 Evaluation
Explained
 		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  Riverdale                     NC    Gates          Bt     2        2625     0.86     ---    3.06   104
 2  BigBranch                     VA    Alleghany      PF     1        1327     0.99    0.95    0.03   35
 3  IndianValley                  VA    Floyd          PF     1         567     1.00    0.98    0.00   31
 4  Olean                         VA    Giles          Trap   1         247     0.79    1.00   12.64   28
 5  Barley                        VA    Greensville    Bt     2        1783     0.94     ---    2.19   70
 6  SpringGarden                  VA    Pittsylvania   Bt     2        8605     0.87     ---    0.26   57
 7  Elliston                      VA    Roanoke        PF     1        5151     0.99    0.95    0.24   42
 8  Newsoms                       VA    Southhampton   Bt     2        1964     0.74     ---    0.82   93
 9  ReedsCreek                    VA    Southhampton   PF     1         560     0.82    0.94    1.29   93
10  EastStoneGap                  VA    WiseNorton     Bt     2        2468     1.00     ---    0.00   2
11  Ansted                        WV    Fayette        Bt     2        2983     0.96     ---    0.51   16
12  EadsRidge                     WV    Monroe         PF     1        1156     1.00    0.88    0.00   32
13  Dawson                        WV    Summers        PF     1        1712     0.98    0.95    0.12   22
14  Pipestem                      WV    Summers        PF     1         340     1.00    0.98    0.00   19
15  Winton                        NC    Gates          Bt     2         277    -4.58     ---    9.08   -1
16  Nixonton                      NC    Pasquotank     Bt     2        1016     0.96     ---    0.16   133

Blocks outside of STS action zone

 #  Block Name                    State County         Agent  Dose    Area,ac    T      T2       C    PPA 
17  Camden                        NC    Pasquotank     Bt     2         416     0.89     ---    0.39   136

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