Evaluation of Treatments in 2002 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  Merry Hill                    NC    Bertie         MD     15g       494     0.98    0.82    0.24   12
 2  Shiloh                        NC    Camden         Btk    24BIUx2  5080     0.90     ---    0.50   15
 3  Nags Head Woods               NC    Dare           MD     15g      1682     0.51    0.77    3.37   18
 4  Sunbeam                       NC    Northampton    MD     15g      1168     0.98    1.00    1.10   11
 5  Buffalo Springs               VA    Charlotte      MD     15g     38175     0.87    0.79    0.78   70
 6  Oakvale                       VA    Giles          MD     6g       4620     0.89    0.75    0.22   7
 7  Ante                          VA    Greensville    MD     6g        460     0.96    0.96    0.36   86
 8  TurkeyCock                    VA    Henry          MD     6g        399     0.98    0.72    0.08   51
 9  Bull Mountain                 VA    Patrick        MD     6g       2383     1.00    1.00    0.00   38
10  Rocky Knob                    VA    Patrick        MD     6g       8825     0.89   -0.17    0.36   33
11  Hollywood                     VA    Pitt           MD     15g       347     0.85    0.99    1.13   55
12  Mt. Cross                     VA    Pitt           MD     6g        436     0.97    1.00    0.25   53
13  Mt. Hermon                    VA    Pitt           Dim    1oz       784     1.00     ---    0.88   53
14  Spring Garden                 VA    Pitt           MD     6g        680     0.92    0.99    0.92   59
15  Hiwasee                       VA    Pulaski        MD     6g      24521     0.98    0.21    0.04   18
16  Fort Chiswell                 VA    Wythe          Dim    1oz      3140     1.00     ---    0.04   8
17  Wytheville                    VA    Wythe          MD     6g      79557     0.86    0.95    0.67   8

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