MSU Extension Fruit & Nuts

This table is meant to serve as a season-long guide for when various life stages of key pests are expected and the best time to target management strategies based on an AVERAGE year. The dates, growth stages, and pest development presented in this guide represent averages for the time period of 1990-2001 for the Northwest Michigan Horticulture Research Center maintained by MSU Enviroweather. Actual situations on any given farm may differ for a particular year.

Acknowledgements: Much of the information provided in this table was originally developed by David Epstein, formerly of the MSU IPM Program, Gary Thornton, former MSU Extension District Fruit Agent, and Larry Gut, MSU Entomology. John Wise, MSU Entomology, and Jim Nugent, former MSU Extension District Horticulturist and NWMHRS Station Coordinator were the original reviewers. Alison Heins, NWMHRS, assisted with data preparation. Funding was provided by the Michigan Cherry Committee and the MSU Center for Integrated Plant Systems.

This 2018 revision was led by Julianna Wilson, Tree Fruit Integrator, MSU Entomology with technical assistance from Laura Vandenberg, and editorial review by Emily Pochubay, Tree Fruit IPM Educator, and Nikki Rothwell, District Horticulturist and Station Coordinator, MSU Extension. This revision adds spotted wing drosophila.