Resistance Management Calculator

Rotation interval from MOA groups.

Total applications/season

MOA groups available

Consecutive same-MOA apps

Pest generation time (days)

Control efficacy (%)

Refuge area (%)

Tab to move between fields

Resistance risk score

Risk category (1-4)2

Consecutive limit exceeded0

Recommended rotation interval3

MOA rotations/season2

Est. seasons to concern8

How to Use This Calculator

How the result changes with Refuge area (%)

Total applications/season: Total number of pesticide applications planned for the season.
MOA groups available: Number of different Mode of Action groups in your rotation.
Consecutive same-MOA apps: Max consecutive applications of the same MOA group planned.
Pest generation time (days): Days per pest generation. Shorter = faster resistance development.
Control efficacy (%): Typical kill rate. Higher efficacy = stronger selection pressure.
Refuge area (%): Percentage of field left untreated as a susceptible gene refuge.

Resistance risk score: 0-100 risk index. <25 Low, 25-49 Moderate, 50-74 High, 75+ Very High.
Risk category (1-4): 1=Low, 2=Moderate, 3=High, 4=Very High resistance risk.
Consecutive limit exceeded: 1 = exceeds the 2-application max for same MOA group.
Recommended rotation interval: Minimum apps between repeating the same MOA group.
MOA rotations/season: Number of complete MOA cycles per season.
Est. seasons to concern: Rough estimate of seasons before resistance becomes likely at current practice.

Identify Input Parameters
4 parameters
Total applications/season = 6, MOA groups available = 3, Consecutive same-MOA apps = 2, Pest generation time (days) = 30 = 6 input(s) provided
Calculate Resistance risk score
Resistance risk score
38 = 38
Calculate Risk category
2 = 2
Calculate Consecutive limit exceeded
0 = 0