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Dutch elm disease

PLANT PEST Dutch elm disease causes leaf wilting in elm trees, which arecommonly planted in Australian cities and gardens.  Minnesota Department of Natural Resources, Bugwood.org Dutch elm diseaseExotic to AustraliaFeatures: One of the most devastating plant diseases in the world that…
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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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Grapevine leaf rust

PLANT PEST Grapevine leaf rust causes dark spotting on the top surface of leaves.Credit: Andrew M. Daly DPIFM, PaDIL Grapevine leaf rustExotic to AustraliaFeatures: Fungal disease of grape causing dark spots on the uppersurface of leaves.Where it's from: Asia, North America, South America,Timor-…
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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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Citrus canker

PLANT PEST Citrus canker infected fruit, stems and leaves.Timothy Schubert, Florida Department of Agriculture and Consumer Services, Bugwood.org. Citrus cankerExotic to Australia, previous incursions have been eradicated from AustraliaFeatures: A bacterial disease that causes significant damage…
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‘Candidatus Liberibacter solanacearum’ complex

PLANT PEST Potato tubers infected with Candidatus Liberibacter solanacearum (Image: Joseph E Munyaneza, USDA-ARS) The tomato-potato psyllid (Bactericera cockerelli) is the insect needed to spread the bacterial infection causing Zebra chip. The tomato-potato psyllid (but not the bacterial…
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Potato late blight (exotic strains)

PLANT PEST Potato late blight is caused by exotic strains of Phytophthora infestans (A2 mating type).Scott Bauer, USDA Agricultural Research Service, Bugwood.org Potato late blight (exotic strains)Exotic to AustraliaExotic to Australia: Phytophthora infestans that causes potato late blight is…
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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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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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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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