Canna Issues & Troubleshooting forum: Most common issue with Cannas: Bud Rot

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Mar 2, 2010 4:06 PM CST
Name: Kim Joon
Homestead, Florida
Bud rot causes numerous spots on unfolding leaves. The
spots run together along veins. The spots may be whitish
at first but soon turn black. Infected flower buds turn
black and die before opening. The disease moves down the
leaf stalk, killing young stems and buds. On older
leaves, the disease spreads slowly, forming irregular,
yellowish spots with water-soaked margins. Use only
healthy roots.

Canna mosaic virus causes leaves to have pale yellow
stripes from the midrib to the margin. The leaves are
wrinkled, curled, chlorotic and are often dusty brown.
The stems, sepals and petals have yellow bands. Destroy
infected plants and control the aphids which spread the

Aster yellows causes irregular, diffuse, dull yellowing of
young leaves which turn brown with age. Infected plants
are destroyed. The disease is spread by aphids.

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