Australian Nursery Industry Myrtle Rust
Small purple or red brown flecks with a faint chlorotic (yellow) halo on leaf surfaces
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Small purple or red brown flecks with a faint chlorotic (yellow) halo on leaf surfaces
on the lesions
See images below and on pages 16, 17 and 18 of this Management Plan. (Images sourced from I&I NSW, NGIQ and DEEDI Queensland)
6 months.
(Source: NGIQ – Myrtle rust on Syzygium jambos) 9 Australian Nursery Industry Myrtle Rust Management Plan (Version 2) – 2012 4. Known hosts of myrtle rust in Australia - February 2012
The species listed below have had observable myrtle rust field infections (natural infection), at some point since December 2010 in Queensland. Experienced DEEDI officers have applied the national myrtle rust susceptibility ranking to each record and given the “Ranking” as noted in Table 4.1. Many of the species listed below have also been recorded as susceptible in New South Wales since April 2010. It can be assumed that susceptible species in Queensland or New South Wales will in all likelihood be susceptible to myrtle rust in every other like environment across Australia. NGIA recommends the industry combine tables 4.1 and 4.2 for a complete (as at February 2012) known myrtle rust susceptibility list. 4.1 Queensland host list and susceptibility rating table – February 2012. (ES=Extremely Susceptible, HS=Highly Susceptible, MS=Moderately Susceptible, RT=Relatively Tolerant) DEEDI susceptibility ratings are based on current observational assessments and may change over time.
Common name RT
Acmena hemilampra (syn. Syzygium hemilamprum) Blush satinash RT
Red apple MS
Grey satinash ES Agonis flexuosa Willow myrtle HS
Aniseed myrtle RT
Brass's Asteromyrtus HS
Midgen berry or midyim RT
Narrow leaf myrtle RT
Curry myrtle or narrow-leaved myrtle HS
Lemon-scented myrtle MS
Grey myrtle, ironwood RT
No common name RT
Shatterwood RT
No common name ES Chamelaucium uncinatum Geraldton wax HS
Brown myrtle, rusty turpentine RT
Giant ironwood RT
Large leaved spotted gum RT
Cadagi
RT Corymbia citriodora subsp. variegata Spotted gum ES Decaspermum humile Silky myrtle RT
Red gum
MS Eucalyptus carnea Broad-leaved white mahogany RT
Gympie messmate MS
Plunkett mallee MS
Flooded gum, rose gum RT
Bastard tallow wood RT
Blue gum, forest red gum MS
Tindale's Stringybark 10 Australian Nursery Industry Myrtle Rust Management Plan (Version 2) – 2012 ES Eugenia reinwardtiana Beach cherry MS
No common name HS
Scrub ironwood RT
Scrub python tree RT
Cape ironwood MS
Sweet myrtle HS
Angle-stemmed myrtle HS
Scaly myrtle ES Gossia inophloia (syn. Austromyrtus inophloia) (near threatened) Thready barked myrtle MS
Gossia macilwraithensis (near threatened) No common name RT
Malanada ironwood, small flowered lignum MS
Dotted myrtle RT
Velvet myrtle HS
Southern velvet myrtle RT
Blackall Range myrtle MS
Lemon-scented tea tree, olive tea tree RT
Bronze-barked tea tree RT
Lemon-scented tea tree RT
No common name RT
Daintree Penda RT
Swamp box, swamp mahogany HS
Weeping tea tree RT
Kingaroy Bottlebrush, cliff bottlebrush HS
Broad-leaved paperbark RT
Snow in summer RT
Showy honey myrtle HS
Prickly-leaved paperbark RT
Wallum bottlebrush HS
No common name ES Melaleuca quinquenervia Broad-leaved paperbark MS
Willow bottlebrush, white bottlebrush HS
Broad-leaved paperbark MS
Willow bottlebrush RT
Fiji Christmas bush RT
Fiji Christmas bush RT
Kermadec pohutukawa RT
New Zealand Christmas bush RT
No common name RT
Common myrtle RT
Plum myrtle RT
Cooloola ironwood ES Rhodamnia angustifolia (endangered) Narrow-leaved malletwood MS
Cape York malletwood MS
Silver myrtle or malletwood HS
Malletwood HS
Rib-fruited malletwood MS
Smooth malletwood ES Rhodamnia maideniana Smooth scrub turpentine 11 Australian Nursery Industry Myrtle Rust Management Plan (Version 2) – 2012 MS
Rhodamnia pauciovulata (near threatened) Small-leaved malletwood ES Rhodamnia rubescens Scrub turpentine HS
Iron malletwood MS
Northern malletwood MS
Crater ironwood MS
Rusty rhodomyrtus, rusty ironwood HS
Native guava MS
Grey rhodomyrtus HS
Downy rose myrtle, Ceylon hill gooseberry MS
No common name RT
No common name MS
Tully Penda MS
Yarrabah satinash RT
Silver satinash RT
White bush apple RT
Scrub cherry RT
Yellow satinash RT
Sour cherry MS
Java Plum MS
White apple RT
Watergum, brown satinash RT
Flaky barked satinash, white apple ES Syzygium jambos Rose apple RT
Small-leaved lillypilly, riberry RT
Rose apple RT
No comon name HS
Blue lillypilly RT
Magenta cherry RT
Laura apple RT
River Cherry, Bamaga satinash RT
Powder puff lilly pilly RT
Cascade lilly pilly MS
Mulgrave satinash HS
Water gum RT
Water gum, kanooka RT
No common name RT
Weeping lillypilly RT
Gully satinash RT
No common name MS
Rolypoly satinash RT
Golden penda HS
Southern penda MS
Crimson penda (Source: DEEDI February 2012)
12 Australian Nursery Industry Myrtle Rust Management Plan (Version 2) – 2012 4.2 New South Wales additional myrtle rust host list not recorded in Queensland to date (February 2012):
Many of the species above have been recorded as susceptible in New South Wales. The list below records those species identified as susceptible in NSW and to date not observed infected in Qld.
available for NSW listed species.
Botanical name Botanical name Botanical name Angophora floribunda Melaleuca decora Syzygium glenum Angophora subvelutina Melaleuca linariifolia Syzygium graveolens Backhousia enata Melaleuca sieberi Syzygium hodgkinsoniae Backhousia hughesii Melaleuca styphelioides Syzygium maraca Barongia lophandra Melaleuca viridiflora (purple flowered form) Syzygium megacarpum Callistemon rigidus Metrosideros excelsa Syzygium minutuliflorum Callistemon salignus (not = Melaeuca saligna) Mitrantia bilocularis Syzygium polyanthum Eucalyptus agglomerata Pilidiostigma rhytispermum Syzygium pseudofastigiatum Eucalyptus deanei Pilidiostigma tropicum Syzygium resa (Syn. Acmena resa) Eucalyptus elata Rhodomyrtus macrocarpa Syzygium sayeri Eucalyptus olida Stockwellia quadrifida Syzygium smithii (Syn. Acmena smithii) Eucalyptus pilularis Syncarpia glomulifera Syzygium trachyphloium Eucalyptus siderophloia Syzygium alliligneum Syzygium velarum Leptospermum rotundifolium Syzygium bamagense Tristaniopsis collina Lithomyrtus obtusa Syzygium boonjee Ugni molinae Lophomyrtus bullata Syzygium buettnerianum Uromyrtus australis Lophomyrtus x ralphii Syzygium bungadinnia Uromyrtus lamingtonensis Melaleuca alternifolia Syzygium cormiflorum Xanthostemon chrysanthus Melaleuca argentea Syzygium dansiei Xanthostemon formosus Melaleuca armillaris Syzygium erythrocalyx Xanthostemon graniticus (Source: I&I NSW February 2012)
13 Australian Nursery Industry Myrtle Rust Management Plan (Version 2) – 2012 5. Fungicide Treatment For the treatment of plants (Myrtaceae family) the industry has access to an Emergency Permit (PER12156) that allows a range of fungicides to be applied for the management of myrtle rust. Therefore if you intend to treat plants with a fungicide you must have a copy of this permit on-site and you must use the application rates as outlined in the permit. You can download the permit by going to the APVMA website (www.apvma.gov.au) and click on ‘Permits’ and follow the prompts.
The permit is a legal document and all directions/rates/intervals must be followed as described in the document. Furthermore all relevant directions as detailed on each individual product label must also be followed by those handling and applying the fungicide(s). NGIA recommends only appropriately trained staff in pesticide handling, use and application should be applying the myrtle rust fungicide program
The table below (Table 5.1) identify’s the various fungicides on the permit plus others with existing registrations and lists the ‘Fungicide activity’ that will assist
in selecting the appropriate product. The ‘Chemical group’ is to ensure that an effective rotation program (see Table 5.2 & 5.3 with examples below) can be applied on-farm if a business intends to have a standard fungicide strategy for the management of myrtle rust. Note: Table 5.3 is based on medium to low risk seasonal disease pressures moving the rotation interval to 4 weeks (1 month).
Fungicide trade name Active constituent Fungicide activity Chemical group (Mode of Action) Minimum re- treatment interval between consecutive applications BAYFIDAN 250 EC FUNGICIDE (PER12156) TRIADIMENOL Systemic, curative and protectant 3 14-21 days SAPROL FUNGICIDE (PER12156) TRIFORINE Systemic, slightly curative and protectant 3 7 days IMTRADE MANCOZEB 750 DF FUNGICIDE (PER12156) MANCOZEB Non-systemic protectant M3
7 days AMISTAR 250 SC FUNGICIDE (PER12156) AZOXYSTROBIN Systemic, slightly curative and protectant 11
14-21 days COPPER
OXYCHLORIDE (PER12156) COPPER OXYCHLORIDE Non-systemic protectant M1
7-14 days PLANTVAX 750 WP FUNGICIDE (PER12156) OXYCARBOXIN Systemic, curative and protectant 7 14 days
TILT 250 EC FUNGICIDE (PER12156) PROPICONAZOLE Systemic, curative and protectant 3 7 days BRAVO (Registered) CHLOROTHALONIL Non-systemic, slightly curative and protectant M5 7 – 14 days 14 Australian Nursery Industry Myrtle Rust Management Plan (Version 2) – 2012 5.2 Myrtle Rust Fungicide Treatment Rotation Program (Production/Propagation) High risk season (External environmental conditions suitable for spore production)
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