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MITES



Bunch mite and scars on berry stems
Bunch mite and scars on berry stems
Photo credit: Geoff Furness
Look For Look For Notes

   LOOK FOR


    Look for in leaves
  • Green galls on top sides of leaves - blister mite
  • Deformed basal leaves - bud mite
  • Bronzed leaves - rust mite
  • Speckling on top sides of leaves - two spotted mite or European red mite. Leaves fall early after severe outbreaks.

    Look for in bunches
  • Brown scars on bunch stalks or berry stems - bunch mite

   CONDITIONS

  • Favour, hot, dry weather
  • Mites are very small and seen only with a hand lens. Find them by looking for the symptoms.
  • Six types of mite feed on grapevines: blister (erinose), bud, rust, bunch, two-spotted mite and, in New Zealand, European red mite.

OTHER MITES IMAGES

Erinose galls trun brown underneath after hot weather Blister mites (erinose) feed on the undersides of leaves in early season. Leaf hairs enlarge and turn white Magnified white lesion Green galls caused by blister mite on the upper surface of leaves Blister mite occasionally causes white growth (leaf hairs) on the upper surface of young leaves Early in the season bud mites deform basal leaves and bunches. Shoot tips may die The mites can be seen with a small microscope Bronzing caused by grapeleaf rust mite is seen after mid-season and is more severe in hot weather Microscopic view of rust mites Leaf spotting and early leaf fall from two spotted mite are induced by overspraying

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