DegreeDayCalc

DegreeDayCalc is an R package that provides an interactive Shiny application for calculating insect phenology using degree-day (thermal time) models.
It allows users to explore developmental progression across life stages (egg, larval/nymphal instars, pupa, adult, and preoviposition) using multiple degree-day calculation methods.

The package is designed for entomologists, ecologists, agronomists, and pest management researchers interested in modeling temperature-driven development.

Features

• Interactive Shiny application
• Multiple degree-day calculation methods:
  • Average
  • Average (cut)
  • Triangular
  • Triangular with upper threshold
  • Sine
  • Sine with upper threshold
• Flexible life-stage definitions:
  • Egg
  • Larva 1–6 or Nymph 1–6 (user selectable)
  • Pupa
  • Adult
  • Preoviposition
• Upload daily temperature data (CSV)
• Automatic assignment of developmental stages
• Visualization of cumulative degree-days and stage transitions
• Downloadable results table (CSV) and figure (PNG)

Installation

From GitHub (development version)

```r # install.packages(“devtools”) devtools::install_github(“almarazkrae-4081/DegreeDayCalc”)