U of M Gardening Information: What's wrong with my plant?

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Roses > Leaves > Leaves wilt

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Credit: Dave Hansen
Credit: Dave Hansen
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Winter injury

Occurs in spring
New growth emerges then wilts and dies as weather turns warm
Dark streaks visible in wood if bark is scraped away

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Credit: David Zlesak
Credit: David Zlesak
Credit: David Zlesak
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Rodent Damage
Rabbits, mice, voles, and other rodents

Leaves fail to leaf out or leaf out very poorly in the spring
Bark is removed around the base of the cane and there are signs of chewing or gnawing
If chewing occurred in the roots, plant may be wobbly and loosely anchored in the ground

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Credit: Jeff Hahn
Credit: Jeff Hahn
Credit: Jeff Hahn
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Rose stem girdler

Occurs during summer
Clumps of leaves wilt and turn brown
Also look for swelling in stem
Small (1/4 inch long), bullet-shaped, iridescent gold; rarely seen
More information on Rose Stem Girdler...

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Credit: Michelle Grabowski
Credit: Michelle Grabowski
Credit: Michelle Grabowski
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Rust
Phragmidium mucronatum

Orange raised bumps on underside of leaves
Twisted or bent leaves, with orange lesions
Powdery orange spores released from all lesions and spots
Severely infected leaves may wilt

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Verticillium Wilt
Verticillium dahliae and Verticillium ablo-atrum

Tips of young canes wilt
Leaves turn yellow, then brown and then fall off
Damage starts on the lowest leaves first and then moves upward
Canes die and turn brown from the tip down
Purplish black streaks occur on stems before they dieback

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