Crabapple Cultivar Susceptibility

Crabapple (Malus spp.) — Cultivar Susceptibility

Cultivar

Apple Scab

Fire Blight

Powdery Mildew

Reference

Adams

M-H1

H

H

A, B, C

Bob White

H

M-H

H

A, B, E

Centennial*

H

H

?

C, E

Chestnut*

M-H

?

?

C

Christmas Holly

H

H

H

A, B, C, D

David

H

H

H

A, B, C, D

Dolgo*

L-M

M-H

H

A, B, C, E

Donald Wyman

M-H

H

H

A, B, C

M. floribunda

H

H

H

A, C

German*

M-H

?

?

C

Indian Magic

M

H

H

A, B

Indian Summer

H

H

H

A, C, D

Jewelberry

H

H

H

A, B, C, D

Manchurian

?

L

?

Martha Dolgo*

L

?

?

C

Molten Lava

H

H

H

A, B, C

Ormiston Roy

H

L-H

H

A, B, C, E

Prairie Fire

M-H

H

H

A, C, D

Professor Sprenger

H

H

H

A, B, C, D

Profusion

H

H

M

A, B, D

Ralph Shay*

M-H

H

L

A, B, C, D

Red Jewel

H

H

H

A, B

M. sargentii

M-H**

H

H

A, B, C, D

Silver Moon

M-H**

L-H

H

A, B, C, D, E

Snowdrift

M-H

L

H

A, B, C, D

Sugar Tyme

M-H

H

H

A, B, C, D

M. tschonoskii

H

H

H

A, C, D

Weeping Candied Apple

M

?

?

C, D

White Angel

H**

H

H

A, B, C, D

Whitney*

M-H

?

?

C

M. x zumi var. calocarpa

M-H

H

H

A, B, C

*Fruit is edible

**Have remained scab free in Wooster, Ohio for over 33 years.

1H = High disease resistance; some leaves may be affected.

M = Moderate disease resistance; leaves and shoots affected but no defoliation.

L = Low disease resistance; heavy infection, defoliation.

? = Information not available.

References

(A) Benson, D.M. and B.I. Daughtry. 1993. Crabapple.cIn: Biological and Cultural Tests for Control of Plant Diseases. St. Paul, MN: APS Press. H = 0-1; M = 2; L = 3-4 in the evaluation of Benson et al.

(B) Hartman, J., J. Doney, and R. McNiel. 1991. Crabapple. In: Biological and Cultural Tests for Control of Plant Diseases. St. Paul, MN: APS Press. H = 0-2; M = 3; L = 4 in the evaluation of Hartman et al.

(C) Norton, R.A. and J. King. 1993. Crab Apples Revisited. Washington Park Arboretum Bulletin 55:10-13.

(D) Unpublished field evaluations from the Pacific Northwest.

(E) van der Zwet, T., Orolaza-Halbrendt, N. and Zeller, W. 2012. Fire Blight: History, Biology, and Management. APS Press.