Myrtle Rust Planting Fact Sheet Page 1 of 4 What is Myrtle rust?
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- How does myrtle rust spread
- Myrtle Rust Planting Fact Sheet
- Table 1. Plant species and their susceptibility to myrtle rust Relatively Tolerant Scientific Name Common Name
- Moderately Susceptible Scientific Name Common Name Acmenosperma claviflorum
- Extremely Susceptible Scientific Name Common Name Agonis flexuosa
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Planting Fact Sheet Page 1 of 4 What is Myrtle rust? Myrtle rust is a serious fungal disease that affects plants in the Myrtaceae family, including natives such as bottle brush (Callistemon spp.), tea tree (Melaleuca spp.) and eucalypts (Eucalyptus spp.). Myrtle rust is distinctive in that it produces masses of powdery bright yellow or orange-yellow spores on infected plant parts.
As myrtle rust is a new disease to Australia, its full host range is unknown. Myrtle rust cannot be eradicated and will continue to spread as it produces thousands of spores which are highly mobile. Although we cannot eradicate the disease, we can limit its spread, manage its impact and carry out research to discover its full host range and seek long-term solutions.
How does myrtle rust spread? Myrtle rust can spread rapidly because it produces thousands of spores that are easily spread by wind, human activity and animals. The disease can spread through the movement of: • infected or contaminated plant material, nursery stock, plant cuttings, flowers and germ plasm; • animals such as bees, birds, bats and possums that have been in contact with rust spores; • contaminated plant waste, timber, wood packaging and dunnage; • contaminated equipment and tools used on or around plants (e.g. chainsaws, secateurs); and • contaminated clothing, shoes and other personal effects.
Myrtle rust is likely to infect plants in wet and humid conditions and rust pustules can mature to release spores in as little as 10–12 days. Spores can survive for up to three months in the environment.
What can I do if I suspect Myrtle rust? Report any suspect detections to Biosecurity Queensland by calling 13 25 23 or visiting http
://www.daff.qld.gov.au/4790_20842.htm
Department of Agriculture, Fisheries and Forestry http://www.daff.qld.gov.au/4790_19788.htm Figure 1: Early Symptoms of myrtle rust infection (DEEDI 2011) .
(DEEDI 2011) .
Myrtle Rust Planting Fact Sheet Page 2 of 4 What can I do to stop the spread of Myrtle rust? If you are planting new trees or undertaking revegetation you can follow these planting recommendations for species selection and appropriate spacing's to minimise the spread of myrtle rust.
If you are undertaking a small scale revegetation project, that is planting a small number of trees, it is recommended that you do not plant species that are highly susceptible or extremely susceptible (Table 1). Species that are classified as relatively tolerant and moderately susceptible are able to be planted.
Myrtle rust spreads easily by a number of different sources therefore, planting highly susceptible or extremely susceptible species in a small scale revegetation project places these plants at increased risk of being affected by myrtle rust.
Large Scale Revegetation If you are undertaking a large scale revegetation project, that is planting a large number of trees, it is recommended that you predominately plant species that are relatively tolerant and moderately susceptible (Table 1).
If you wish to plant highly susceptible or extremely susceptible plant species it is recommend that you adopt the following planting strategies to reduce the potential of these species being affected by myrtle rust:
• plant extremely susceptible and highly susceptible species few and far between, mainly plant relatively tolerant and moderately susceptible species; • buffer extremely susceptible and highly susceptible species with relatively tolerant species; and • buffer extremely susceptible and highly susceptible species from prevailing winds of the season,
• increase the spacing between the plants to reduce humidity. No specific distance is recommended.
Blush satinash Acmenaingens Red apple Asteromyrtus brassii Brass's Asteromyrtus Austromyrtus tenuifolia Narrow leaf myrtle Backhousia angustifolia Curry myrtle or narrow-leaved myrtle Backhousia oligantha (endangered) No common name Backhousia sciadophora Shatterwood Backhousia sp. 'Prince Regent' No common name Choricarpia subargentea (near threatened) Giant ironwood Corymbia henryi Large leaved spotted gum Corymbia torelliana Cadagi
Corymbia citriodora subsp. variegata Spotted gum Eucalyptus sp. Red gum Eucalyptus cloeziana Gympie messmate Eucalyptus planchoniana Bastard tallow wood Eucalyptustereticornis Blue gum, forest red gum Gossia bidwillii (syn. Austromyrtus bidwillii) Scrub python tree Gossia floribunda Cape ironwood Gossia myrsinocarpa Malanada ironwood, small flowered lignum Lenwebbia lasioclada Velvet myrtle Lenwebbia sp. 'Blackall Range' (endangered) Blackall Range myrtle Leptospermum liversidgei Blackall Range myrtle Leptospermum petersonii Lemon-scented tea tree Leptospermum semibaccatum No common name
Myrtle Rust Planting Fact Sheet Page 3 of 4 Lindsayomyrtus racemoides Daintree Penda Lophostemon suaveolens Swamp box, swamp mahogany Melaleuca formosa (syn. Callistemon formosus) Kingaroy Bottlebrush, cliff bottlebrush Melaleuca nesophila Showy honey myrtle Melaleuca pachyphylla Wallum bottlebrush Metrosideros collina Fiji Christmas bush Metrosideros collina x villosa Fiji Christmas bush Metrosideros kermadecensis Kermadec pohutukawa Metrosideros thomasii New Zealand Christmas bush Myrciaria cauliflora No common name Myrtus communis Common myrtle Pilidiostigma glabrum Plum myrtle Rhodamnia acuminata Cooloola ironwood Ristantia waterhousei (vulnerable) No common name Syzygium argyropedicum Silver satinash Syzygium armstrongii White bush apple Syzygium australe Scrub cherry Syzygium canicortex Yellow satinash Syzygium corynanthum Sour cherry Syzygium forte subsp. forte Watergum, brown satinash Syzygium forte subsp. potamophilum Flaky barked satinash, white apple Syzygium luehmannii Small-leaved lillypilly, riberry Syzygium moorei Rose apple Syzygium nervosum No comon name Syzygium paniculatum Magenta Cherry Syzygium rubrimolle Laura apple Syzygium tierneyanum River Cherry, Bamaga satinash Syzygium wilsonii Powderpuff lilly pilly Syzygium wilsonii x luehmanii Cascade lilly pilly Tristaniopsis laurina Water gum, kanooka Uromyrtus tenella No common name Waterhousea floribunda (syn. Syzygium floribundum) Gully satinash Waterhousea mulgraveana No common name Moderately Susceptible Scientific Name Common Name Acmenosperma claviflorum Grey satinash Backhousia myrtifolia Grey myrtle, ironwood Eucalyptus carnea Broad-leaved white mahogany Eucalyptus curtisii Plunkett mallee Eucalyptus grandis Flooded gum, rose gum Eucalyptus tindaliae Tindale's stringybark Eugenia zeyheri No common name Gossia fragrantissima (endangered) Sweet myrtle Gossia macilwraithensis (near threatened) No common name Gossia punctata Dotted myrtle Leptospermum luehmannii Lemon-scented tea tree, olive tea tree Melaleuca saligna Willow bottlebrush, white bottlebrush Melaleuca viminalis (syn. Callistemon viminalis) Willow bottlebrush Rhodamnia arenaria Cape York malletwood Rhodamnia argentea Silver myrtle or malletwood Rhodamnia glabrescens (near threatened) Smooth malletwood Rhodamnia pauciovulata (near threatened) Small-leaved malletwood Rhodamnia spongiosa (syn. R. glauca) Northern malletwood Rhodomyrtus canescens Crater ironwood Rhodomyrtus pervagata Rusty rhodomyrtus, rusty ironwood
Myrtle Rust Planting Fact Sheet Page 4 of 4 Rhodomyrtus sericea Grey rhodomyrtus Rhodomyrtus trineura subsp. capensis No common name Sphaerantia discolor Tully Penda Syzygium angophoroides Yarrabah satinash Syzygium cumini Java plum Syzygium eucalyptoides subsp. eucalyptoides White apple Syzygium xerampelinum Mulgrave satinash Waterhousea Unipunctata Rolypoly satinash Xanthostemon youngii Crimson penda Highly Susceptible Scientific Name Common Name Anetholea anisata (syn. Backhousia anisata, Syzygium anisatum) Aniseed myrtle Austromyrtus dulcis Midgen berry or midyim Backhousia citriodora Lemon-scented myrtle Choricarpia leptopetala Brown myrtle, rusty turpentine Gossia acmenoides Scrub ironwood Gossia gonoclada (endangered) Angle-stemmed myrtle Gossia hillii Scaly myrtle Lenwebbia prominens (near threatened) Southern velvet myrtle Melaleuca fluviatilis Weeping tea tree Melalecua leucadendra Broad-leaved paperbark Melaleuca nodosa Prickly-leaved paperbark Melaleuca polandii No common name Melaleuca viridiflora Broad-leaved paperbark Rhodamnia costata Malletwood Rhodamnia dumicola Rib-fruited malletwood Rhodamnia sessiliflora Iron malletwood Rhodomyrtus psidioides Native guava Rhodomyrtus tomentosa Downy rose myrtle, Ceylon hill gooseberry Syzygium oleosum Blue lillypilly Tristania neriifolia Water gum Xanthostemon oppositifolius (vulnerable) Southern penda Extremely Susceptible Scientific Name Common Name Agonis flexuosa Willow myrtle Chamelaucium uncinatum Geraldton wax Eugenia reinwardtiana Beach cherry Gossia inophloia (syn. Austromyrtus inophloia) (near threatened) Thready barked myrtle
Broad-leaved paperbark Rhodamnia angustifolia (endangered) Narrow-leaved malletwood Rhodamnia maideniana Smooth scrub turpentine Rhodamnia rubescens Scrub turpentine Syzygium jambos Rose apple
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