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Xylella and exotic vectors

PLANT PEST Scorched leaves are a common symptom of the bacterial disease Xylella which can infect hundreds of plant species. John Hartman, University of Kentucky, Bugwood.org Xylella and exotic vectorsExotic to AustraliaFeatures: A bacterial disease that…
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Ug99 wheat stem rust

PLANT PEST Ug99 is the name given to a type of fungal infection that is deadly to grains and would see our grain rejected by overseas markets.Sabine Werres BBA, Braunschweig, Germany, PaDIL Ug99 wheat stem rustExotic to AustraliaFeatures: A fungal pest causing wheat stem rust that could cause…
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Pine pitch canker

PLANT PEST Pine pitch canker has infected the middle tree in this image,causing oozing and saturation with resin.Miloň Dvořák, EPPO. Pine pitch cankerExotic to AustraliaFeatures: Fungal disease of all pine species and Douglas fircausing ‘bleeding’…
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Potato cyst nematode (exotic strains)

PLANT PEST Potato cyst nematode produces characteristic cysts on plant roots. This is a close up of cysts that measure only 0.5 mm across.Gordon Berg, DPI Victoria, PaDIL. Potato cyst nematode (exotic strains)Exotic to Australia (white potato cyst nematode), or under management (golden potato…
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Sudden oak death (airborne Phytophthora spp.)

PLANT PEST Leaf blight and shoot dieback on rhododendron caused by sudden oak death.Credit: Sabine Werres BBA, Braunschweig, Germany, PaDIL Sudden oak death (airborne Phytophthora spp.)Exotic to AustraliaFeatures: A disease caused by airborne species of the fungus-like organism Phytophthora that…
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Panama disease

PLANT PEST Early symptoms of Panama disease are yellowing leaves that collapse into a ‘skirt’.Dr Luadir Gasparotto, Embrapa, PaDIL. Panama disease Tropical Race 4Restricted distribution in Northern Territory and Queensland (under quarantine control)Features: Soil-borne fungal disease that causes…
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Karnal bunt

PLANT PEST Grains of wheat infected with Karnal buntL.A. Castlebury USDA-ARS SBML, PaDIL. Karnal buntExotic to AustraliaFeatures: A fungal disease that causes broken hollow (bunted) grain, powdery masses of dark spores, and a strong fishy odourWhere it's from: India originally, but now also…
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Huanglongbing and vectors

PLANT PEST Huanglongbing causes uneven mottling across leaves leading to the eventual death of the citrus plant.M.E. Rogers, UFL, idtools.org.  Huanglongbing and vectorsExotic to AustraliaFeatures: A bacterial disease that causes yellowing, blotchy mottling, and unseasonal leaf flushing,…
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Myrtle (eucalyptus) rust (exotic strains)

PLANT PEST Myrtle rust symptoms on leaves.D.T. Junghans Embrapa, PaDIL. Myrtle (eucalyptus) rust (exotic strains)Exotic to AustraliaFeatures: A fungal infection that causes brown to grey lesions often surrounded by yellow sporesWhere it's from: Central America and Caribbean, United States, South…
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Fruit flies (exotic)

PLANT PEST The melon fruit fly is one of the exotic species that threaten Australia’s production of fruit and vegetables.Florida Division of Plant Industry, Florida Department of Agriculture and Consumer Services, Bugwood.org. Fruit flies (exotic)Exotic to Australia. Mediterranean fruit fly is…
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