Plant & Pest Diagnostics

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  Suspect herbicide resistance? Submit weed seeds for screening

  Published on October 19, 2022
  Collect weed seeds September-October to submit for herbicide resistance screening.

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  Leaf scorch or oak wilt: What’s plaguing my tree?

  Published on September 26, 2022
  Browning of oak leaves may be caused by environmental stress rather than oak wilt.

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  2022 status of herbicide-resistant weeds in Michigan

  Published on September 10, 2022
  Each year new herbicide resistance cases are identified by MSU Plant & Pest Diagnostics

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  Winter injury on shrubs following combined environmental stresses

  Published on June 24, 2022
  MSU Plant & Pest Diagnostics and MSU Extension have seen an uptick in the number of winter injury cases in spring 2022.

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  Broadleaf helleborine: A weedy orchid invading lawns and flowerbeds

  Published on June 24, 2022
  Updated methods for combating broadleaf helleborine.