Grape Berry Moth Risk

• Pupa overwinters on leaf

• High risk
  • History of high GBM injury
  • ᡪ% vineyard perimeter adjacent to woods

• Low-risk
  • History of low GBM injury
  • < 25% of vineyard perimeter adjacent to woods

• Pupa dies if < 5°F for several days

• Infested leaves accumulate in woods near vineyard

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