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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Forsythia > Leaves discolored white, yellow or pale green

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Forsythia > Stems/branches > Leaves discolored white, yellow or pale green

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Two-spotted spider mite
Tetranychu surticae

  • White to yellow stippling on foliage; leaves can appear off-green
  • Heavy infestations will cause leaves to turn white, yellow and ultimately grayish bronze
  • Premature leaf drop may occur
  • Webbing may be present, especially when heavily infested
  • Mites usually appear in late June to August; they are more prevalent in hot, dry weather
  • Adult spider mites are small(approximately 1/50 inch long) and are hard to see; they are yellow to dark red with dark spots (need magnification to see)
  • More information on two-spotted spider mites...
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Oystershell scale
Lepidosaphes ulmi

  • Light to moderate infestations show little or no symptoms
  • Severe infestations can cause chlorotic, stunted foliage
  • Dieback and cracked bark can result from heavy infestations
  • Light to dark brown, elongated, 1/10 to 1/8 inch long oyster-shell shaped scales found on bark
  • More information on Oystershell scale...

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