A new guide to managing Drosophila suzukii in Michigan’s cherry orchards

07 Jul 2026
501

Drosophila suzukii (known in English as Spotted Wing Drosophila or SWD) is an invasive species first detected in Michigan in 2010. It is now a key pest for ripening cherries and berries.

A new factsheet outlines the current best practices for monitoring the pest and preventing fruit infestation in cherry orchards.

Key messages

• Protect ripening fruit until harvest using effective insecticides, with short treatment intervals and thorough coverage.

• Adjust pest management programs under high-risk conditions, such as rainy periods and high exposure to UV rays, to ensure effectiveness.

• Check fruit directly for larvae as harvest approaches.

Harvest

• If possible, avoid delays in harvest: overripe fruit left in the orchard is highly susceptible to infestations.

Read the full guide here:

Source: Michigan State University Extension

Image source: Tim Haye, Le Matin


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