Dr. Phyto

olive tree

Olea europaea

Diseases & pests on this plant

• olive fruit flyBactrocera oleae

  Small entry hole on the fruit, internal tunneling.

• peacock spotSpilocaea oleagina

  Round dark spots with a pale halo on upper leaf surface.

• black olive scaleSaissetia oleae

  Black domed scales on twigs and leaves.

• olive Verticillium wiltVerticillium dahliae

  Half a tree wilting in summer while the other half stays green, blackish discoloration in cross-section of affected wood, partial recovery in winter then relapse, dieback over 2–4 seasons.

• olive quick decline syndromeXylella fastidiosa subsp. paucaEU-notifiable quarantine organism

  Scorched canopy starting at the top and progressing downward, whole branches dying with leaves clinging on, no recovery after pruning, often confused with drought stress until laboratory confirmation.