Evaluation of Treatments in 2008

Evaluation of Treatments in 2008 in VA, WV, and NC

Index of treatment success
T = 1 - [N_t/N_{t -1}]*[n_{t -1}/n_t]
Index of colony presence
C = N_t/n_t

Map of treatment blocks

Table with full information

(view with Excel, see legend)

Treatment EvaluationExplained

N_t and n_t 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, N_t and n_t in equations for T and C are replaced by N_t+1 and n_t+1. If values of n_t-1 or n_t 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 Bracey NC Warren Btk 25BIUx1 502 0.60 --- 7.68 168 2 Milton NC NC Caswell MD 6g 21102 0.91 0.76 0.21 134 3 51/MD-BF-6-1 VA Rockbridge MD 6g 62 --- --- --- -1 4 51/MD-BF-6-2 VA Rockbridge MD 6g 61 --- --- --- -1 5 51/MD-F-6-1 VA Rockbridge MD 6g 62 --- --- --- -1 6 51/MD-F-6-2 VA Rockbridge MD 6g 62 --- --- --- -1 7 51/MD-F-6WS VA Rockbridge MD 6W 123 --- --- --- -1 8 51/MD-S-0.06-1 VA Rockbridge MD VMD 62 --- --- --- -1 9 51/MD-S-0.06-2 VA Rockbridge MD VMD 62 --- --- --- -1 10 51/MD-S-0.6-1 VA Rockbridge MD VMD 62 --- --- --- -1 11 51/MD-S-1.2-1 VA Rockbridge MD VMD 62 --- --- --- -1 12 51/MD-S-3-1 VA Rockbridge MD VMD 62 --- --- --- -1 13 51/MD-S-3-2 VA Rockbridge MD VMD 62 --- --- --- -1 14 51/MD-S-6-1 VA Augusta MD VMD 62 --- --- --- -1 15 51/MD-S-6-2 VA Augusta MD VMD 62 --- --- --- -1 16 51/MD-S-WS VA Rockbridge MD 6W 123 --- --- --- -1 17 Atkins VA Smyth MD 6g 13681 0.92 0.86 0.40 152 18 Chatham Hill VA Smyth MD 6g 1115 0.98 0.83 0.16 101 19 Clarksville North VA Mecklenburg Btk 25BIUx1 1711 -0.07 --- 6.92 1 20 Clarksville North_2 VA Mecklenburg MD 6g 4078 0.99 0.87 0.12 1 21 Fancy Gap VA Carroll MD 6g 9012 0.97 0.91 0.15 204 22 Hutchinson Rock_Btk VA Tazewell Btk 25BIUx2 505 1.00 --- 0.00 102 23 Hutchinson Rock_MD VA Tazewell MD 15W 43470 0.99 0.92 0.02 102 24 La Crosse VA Brunswick MD 6g 1430 0.95 0.94 0.27 120 25 Lawrenceville VA Brunswick MD 15W 3130 1.00 0.85 0.06 121 26 Marion VA Smyth MD 6g 1925 0.89 1.00 0.63 149 27 Milton VA VA Pittsylvania MD 6g 19388 0.99 0.96 0.02 134 28 Rural Retreat VA Wythe MD 6g 13690 0.85 0.93 0.31 179 29 Saltville VA Smyth MD 6g 28111 0.93 0.89 0.28 192 30 Tiptop_Btk VA Tazewell Btk 25BIUx2 437 1.00 --- 0.00 102 31 Trout Dale VA Smyth MD 6g 7700 0.95 0.98 0.30 97 32 Whitetop Mountain1 VA Smyth MD 6g 8777 0.97 0.83 0.23 97 33 Whitetop Mountain2 VA Smyth MD 6g 10207 0.99 0.97 0.11 97

Blocks outside of STS action zone

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

34  51/MD-S-0.6-2                 VA    Augusta        MD     VMD        62      ---     ---     ---   14
35  51/MD-S-1.2-2                 VA    Augusta        MD     VMD        61      ---     ---     ---   14
36  Oak Level                     VA    Halifax        MD     6g       1476     0.96    0.74    0.13   32
37  South Boston                  VA    Halifax        MD     15W      1247     0.94    0.41    0.13   39

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