Evaluation of Treatments in 2009

Evaluation of Treatments in 2009 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 25BIUx2 403 1.00 --- 0.08 13 2 Carolla NC Currituck Btk 25BIUx1 365 0.70 --- 0.05 500 3 Kitty Hawk Btk NC Dare Btk 25BIUx1 204 0.91 --- 1.57 5 4 Kitty Hawk Gypchek NC Dare Npv 5x10^11 303 0.93 --- 0.69 5 5 Knotts Island N NC Currituck Btk 25BIUx1 401 0.27 --- 0.63 500 6 Oxford NC Granville Btk 25BIUx2 175 0.99 --- 0.35 3 7 Brumley VA Washington MD 6g 12188 1.00 1.00 0.01 2 8 Clarksville North_MD VA Mecklenburg MD 6g 765 0.76 0.56 4.86 81 9 Jewel Ridge VA VA Tazewell MD 6g 61698 0.99 0.97 0.03 5 10 Mount Hermon VA Pittsylvania MD 6g 10141 0.93 0.70 0.09 60 11 Mount Hermon_2 VA Pittsylvania MD 6g 1061 0.97 0.87 0.11 60 12 Nebo VA Smyth MD 6g 15521 0.94 0.86 0.78 13 13 Omega_MD VA Halifax MD 6g 3019 0.98 0.86 0.24 74 14 Patrick Springs VA Patrick MD 6g 1512 0.92 0.85 0.20 41 15 Sanville VA Henry MD 6g 3062 0.92 -0.47 0.15 46 16 Tazewell South A VA Tazewell MD 15W 3199 1.00 1.00 0.00 12 17 Tazewell South B VA Tazewell MD 15W 5680 0.98 0.89 0.12 12 18 Tazewell South C VA Smyth MD 15W 4568 0.96 0.93 0.51 12 19 Jewell Ridge WV WV McDowell MD 6g 6930 0.98 0.96 0.12 5

Blocks outside of STS action zone

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

20  GR2                           VA    Rockbridge     MD     3g         62      ---     ---     ---   110
21  GR7                           VA    Rockbridge     MD     3g         62      ---     ---     ---   111
22  Jackson1                      VA    Augusta        MD     3g         62      ---     ---     ---   166
23  Jackson3                      VA    Augusta        MD     3g         62      ---     ---     ---   166
24  MD-BF-6-1                     VA    Augusta        MD     6g         62      ---     ---     ---   165
25  MD-BF-6-2                     VA    Augusta        MD     6g         62      ---     ---     ---   164
26  MD-F-6-1                      VA    Augusta        MD     6g         62      ---     ---     ---   165
27  MD-F-6-2                      VA    Augusta        MD     6g         62      ---     ---     ---   164

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