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WEEVILS



Larvae with white head and black jaw could be the white-fringed weevil (15 mm) or Fuller's rose weevil (10 mm)
Larvae with white head and black jaw could be the white-fringed weevil (15 mm) or Fuller's rose weevil (10 mm)
Photo credit: Stewart Learmonth
Look For Look For Notes

   LOOK FOR


    Look for in leaves
  • Chew marks on leaves or on young wood
  • Adult weevils at night feeding on leaves
  • 'Shot holes' in leaves eaten by various weevils e.g. garden, apple, Fuller's rose, white-fringed and/or black vine weevil

    Look for in bunches
  • Ringbarking of bunch stalks eaten by the garden or apple weevils (Also see Boring Insects and Pests of Young Vines

   CONDITIONS

  • Few weevils cause economic damage
  • In Western Australia and NZ, weevils sometimes damage small groups of vines. Weevil grubs are like beetle grubs but are small, pale, and have no legs or enlarged rear. Weevil adults usually cannot fly.
  • Distinguish weevils from other beetles by their stubby snout, narrow head and shoulders and that they play dead when disturbed. Adults feed at night and shelter under leaf litter or bark during the day.

   NOTES

    ACTION
    **If weevils are of concern, monitor every seven days from budburst till December
    **At budburst, a spade full of soil near the base of 20 damaged vines may reveal larvae or emerging adults
    **To monitor for adult weevils, wrap a single-faced corrugated cardboard band (10 cm wide) around the trunk of several vines in spring. After seven days, look for sheltering adults
    **To find adults during the day, lightly scrape the soil at the base of damaged vines or under leaves and bark on the canopy
    **During the night, look for weevils eating leaves

OTHER WEEVILS IMAGES

Garden weevils damage grape bunches by ringbarking the main bunch stem Garden weevils chew distinctive shot holes in vine leaves Adult garden weevils are grey-brown with a white ban on their back Black vine weevil adult Larvae with brown-head and black jaw could be garden or apple weevil (10 mm) or black vine weevil (15 mm)

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