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e-Gro Alert report by Brian Whipker:

Mottling and necrotic spotting on calla lilies

Everyone who grows calla lilies (Zantedeschia spp.) is familiar with the primary disease bacterial soft rot (Erwinia carotovara). Shoots start to wilt, rot at the base, and have the characteristic fish smell.

A number of viruses are also reported on calla lilies. The two primary ones common in greenhouse forcing are impatiens necrotic spot virus (INSV) and tomato spotted wilt virus (TSWV). Dasheen mosaic virus has also been reported.

Click here to read more about mottling and necrotic spotting on calla lilies in the e-Gro Alert report by Brian E. Whipker (PDF)