Angular leaf spot of Pittosporum tobira

Disease Information

Angular leaf spot

(Cercospora pittospori)

 Symptoms

 Light yellow to tan angular spots first appear on upper leaf surfaces. The spots are angular due to restriction by veins. Leaf distortion also occurs on new growth and older leaves may drop.

 COMMENTS on disease

 Warm, wet conditions favor disease development.

Management

 Minimize leaf wetness by irrigating the root ball rather than foliage. Irrigate early in the morning to minimize periods of leaf wetness. Prune to allow good air movement through the plant canopy. Fungicides may be necessary for disease management. Coverage of both leaf surfaces is essential.



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