October 2012 archive

Pest of the Month September 2012 – Rust on Tree Heliotrope

Distribution: Hawaiian Islands – Hawaii, Maui, Oahu, Kauai, Molokai, and Lanai.  However, it only infects trees in a few locations on each island. Damage: Small leaves with powdery cinnamon to dark chocolate rust pustules on top and bottom leaf surfaces; brown, necrotic leaf spots; leaf curling and yellowing; leaf death, premature defoliation, tree decline Management: …

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