Agronomic Intelligence Lab

Using a Degree-Day Model to Forecast Adult Japanese Beetle Activity

A practical walkthrough of using the Ebbenga et al. degree-day model to forecast adult Japanese beetle activity and improve scouting timing.

How to Code the Magarey Generic Infection Model for Foliar Fungal Plant Pathogens in Python

A practical Python translation of the Magarey et al. generic infection model for foliar fungal plant pathogens, including temperature response, wetness duration, D50 interruption logic, and disease-risk classification.

How to Estimate Leaf Wetness Duration (LWD) Using the CART Method in R

A practical R walkthrough for estimating leaf wetness duration (LWD) with the CART method for plant disease forecasting and risk modeling.

How to Create Weather-Based Predictors for Plant Disease Modeling in R

A practical R guide to creating weather-based predictors for plant disease modeling, agronomic analytics, and disease forecasting workflows.

How to Calculate Area Under Disease Gradient (AUDG) in R

A step-by-step R walkthrough for calculating area under disease gradient (AUDG) from field observations and comparing treatments in plant disease epidemiology.