fbpx Plant Health Care Report issue 2020-5 | The Morton Arboretum

Plant Health Care Report issue 2020-5

May 29, 2020

The scouting report of The Morton Arboretum for May 29, 2020.

PDF iconPlant Health Care Report issue 5 for May 29, 2020

 

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What indicator plant is in bloom in Dupage County?
Bridalwreath spirea (Spiraea x vanhouttei) is in flower

Accumulated Growing Degree Days (Base 50): 355 (as of May 28)
Accumulated Growing Degree Days (Base 30): 1745 (as of May 28)

 

Insects/other pests

  • Boxwood leafminer
  • Boxwood psyllid
  • Woolly alder aphid
  • Spittlebug
  • Slugs
  • Rose slug sawfly and friends
  • Azalea sawfly
  • Galls, part 1
  • Update on pine sawfly

 

Diseases

  • Anthracnose of shade trees
  • Cedar rust questions
  • More cedar rust
  • Rust on buckthorn

 

Weeds

  • Poison hemlock

 

Miscellaneous

  • Is your ginkgo brown?
  • Cautions when using pesticides

 

 

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