Malus tschonoskii (Chonosuki crab)

Botanical name

Malus tschonoskii

Other names

Chonosuki crab, Pillar crab

Genus

Malus Malus

Species

M. tschonoskii - M. tschonoskii is a mid-sized, deciduous tree with glossy, mid-green leaves turning bronze, orange, crimson and purple in autumn. It has pink-budded, white blossom in spring and yellow and red fruits in autumn.

Foliage

Deciduous

Tree shape

Narrowly conical

Awards

RHS AGM (Award of Garden Merit)

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Colour

Flower

Pale-pink, White in Spring

Foliage

Green in Spring; Green in Summer; Bronze, Purple, Orange, Crimson in Autumn

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How to care

Watch out for

Specific pests

Aphids , Caterpillars , Fruit tree red spider mite , Woolly aphid

Specific diseases

Apple and pear canker , Apple scab , Fireblight , Powdery mildew

General care

Propagation methods

Budding, Grafting, Seed

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Monthly care advice

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Where to grow

Malus tschonoskii (Chonosuki crab) will reach a height of 12m and a spread of 8m after 10-20 years.

Suggested uses

Architectural, City, Containers, Cottage/Informal, Foliage only

Cultivation

Plant in moderately fertile, moist, free-draining soil in full sun, although it will tolerate partial shade.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

North, South, East, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

Defra's Risk register #1

Plant name

Malus tschonoskii (Chonosuki crab)

Common pest name

grape ground pearl

Scientific pest name

Margarodes vitis

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

5

General biosecurity comments

Main pathway; Vitis spp. plants for planting; already prohibited. However; further consideration of other pathways is required.

Defra's Risk register #2

Plant name

Malus tschonoskii (Chonosuki crab)

Common pest name

Round headed apple tree borer

Scientific pest name

Saperda candida

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

3

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

American wood boring beetle; single European incursion into a German Island in the Baltic; limited likelihood of introduction into the UK due to small volume of trade and import inspections. Possible EU listing will limit risk further.

Defra's Risk register #3

Plant name

Malus tschonoskii (Chonosuki crab)

Common pest name

Citrus little leaf; Little leaf of citrus; Sour orange stem pitting; Stem pitting of sour orange; Xyloporosis of citrus

Scientific pest name

Hop stunt viroid

Type

Virus or Viroid

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

3

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

Pest of hops present in America and parts of Europe. PHPS provides good assurance of disease freedom; but EU regulation to be pursued to enhance protection in the longer term.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/