Golden Nematode
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Figure 1 |
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Figure 2 |
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Figure 3 |
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Scientific
Name: Globodera rostochiensis
Common Name: golden nematode, golden potato cyst nematode, yellow potato cyst nematode
Known Hosts:
Potatoes (Solanum spp.), tomatoes (Lycopersicum esculentum), eggplant (S. melogena), and some solanaceous weeds (e.g. nightshade).
Symptoms: |
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Patches of poor growth with yellowing or wilting of foliage. (Figure 1) |
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Small tubers (Figure 2). |
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With a heavy infestation the cysts are visible on the roots with the naked eye. (Figure 3) |
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Cysts are the hardened body of the female nematode swollen with eggs. They are spherical in shape and attached to the root by a stalk (the head and neck of the female). (Figure 4) |
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Cysts start out white then turn a golden yellow color and finally turn brown. (Figure 5) |
Similar diseases or symptoms: |
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Mild infestation could be mistaken for water stress or mineral deficiency. Laboratory analysis is needed to determine if nematodes are present. |
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The pale cyst nematode (Globodera pallida) is very similar to the golden nematode except that it does not pass through the golden yellow phase as the cyst darkens. (Figure 6) |
Fact sheets and references:
Cooperative Agricultural Pest Survey Golden Nematode Web Page
http://pest.ceris.purdue.edu/pest.php?code=NEFBBBA
USDA/APHIS Golden Nematode Web Page
http://www.aphis.usda.gov/plant_health/plant_pest_info/nematode/index.shtml
EPPO Data Sheets on Quarantine Pests
http://www.eppo.org/QUARANTINE/nematodes/Globodera_pallida/HETDSP_ds.pdf
Ministry of Agriculture, Food and Fisheries: Government of British Columbia
http://www.agf.gov.bc.ca/cropprot/goldennema.htm
Canadian Food Inspection Agency
http://www.inspection.gc.ca/plants/plant-protection/nematodes-other/potato-cyst-nematodes/fact-sheet/eng/1337002354425/1337002587229
Brodie, B.B. 1996. Golden Nematode: A Success Story for Biological Control.
http://www.nysaes.cornell.edu/ent/bcconf/talks/brodie.html
Michigan State University Golden Nematode Factsheet
http://www.ipm.msu.edu/uploads/files/Forecasting_invasion_risks/goldenNematode.pdf
Rich, A.E. 1983. Potato diseases. Academic Press, New York, New York.
Hooker, W.J., ed. 1981. Potato Cyst nematodes, pp. 94-96 in Compendium of potato Diseases. American Phytopathological Society, St. Paul, Minnesota, USA.
last reviewed December 30, 2014
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