Trap Monitoring Score Calculator

Calculate trap density, pheromone trap spacing, field coverage, and interpret capture data against action thresholds.

Field size (acres)

Number of traps deployed

Trap attraction radius (meters)

Total weekly captures (all traps)

Action threshold (captures/trap/week)

Monitoring period (days)

Tab to move between fields

Field coverage (%)

77.6

Captures/trap/week

Trap density (traps/acre)0.1

Current trap spacing (m)201.2

Recommended spacing (m)170

Recommended trap count8

Captures/trap/day1.29

% of action threshold90

Above threshold (0/1)0

Pest pressure (1-4)3

Acres Per Trap10

How to Use This Calculator

Enter Field size (acres), Number of traps deployed, and Trap attraction radius (meters).
Set Total weekly captures (all traps), Action threshold (captures/trap/week), and Monitoring period (days).
Review Field coverage (%) and Captures/trap/week.
Use Trap density (traps/acre) and Current trap spacing (m) to inform your decision.

How the result changes with Trap attraction radius (meters)

Trap attraction radius (meters)	Field coverage (%)	Captures/trap/week
105	85.6	9
353	100	9
652	100	9
901	100	9

Field size (acres): Total field area being monitored with traps.
Number of traps deployed: Total traps currently placed in the field.
Trap attraction radius (meters): Effective attraction range of the pheromone lure. Typical: 50-300m depending on species and lure type.
Total weekly captures (all traps): Sum of all insects captured across all traps over the monitoring period.
Action threshold (captures/trap/week): Treatment action threshold in captures per trap per week for the target pest species.
Monitoring period (days): Number of days traps were deployed before checking captures.

Trap density (traps/acre): Number of traps per acre of field area.
Current trap spacing (m): Average distance between traps based on uniform field distribution.
Recommended spacing (m): Optimal trap spacing for good coverage based on attraction radius (1.7× radius).
Field coverage (%): Percentage of field area within trap attraction zones.
Recommended trap count: Number of traps needed for full field coverage at optimal spacing.
Captures/trap/week: Average weekly captures per individual trap.
Captures/trap/day: Average daily captures per individual trap.
% of action threshold: Current capture rate as a percentage of the action threshold.
Above threshold (0/1): 1 = captures exceed the action threshold, treatment recommended.
Pest pressure (1-4): 1 = Low (<25% threshold), 2 = Moderate (25-75%), 3 = High (75-150%), 4 = Very High (>150%).

Identify Input Parameters
4 parameters
Field size (acres) = 50, Number of traps deployed = 5, Trap attraction radius (meters) = 100, Total weekly captures (all traps) = 45 = 6 input(s) provided
Calculate Field coverage
Field coverage = min(100, (totalCoverageM2 / fieldSqM) * 100)
77.6 = 77.6
Calculate Captures/trap/week
Captures/trap/week = totalCapturesWeek / numTraps
9 = 9
Calculate Trap density
Trap density = numTraps / fieldAcres
0.1 = 0.1
Calculate Current trap spacing
Current trap spacing = sqrt(fieldSqM / numTraps)
201.2 = 201.2