Evaluation of Treatments in 2002

Evaluation of Treatments in 2002 in MN and IA

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 Crooked Creek MN NA MD 15g 650 0.96 1.00 0.23 -1 2 Golden Valley MN NA Btk 30BIUx2 1837 0.99 --- 0.40 -1 3 Lake Harriet MN NA Btk 30BIUx2 425 1.00 --- 0.00 -1

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