Author
 |
Brodie, Bill |
|
Submitted to: American Journal of Potato Research
Publication Type: Abstract Only Publication Acceptance Date: 4/12/2001 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: Soil and climatic conditions in all major potato production areas of North America are conducive to the development of potato cyst nematodes (Globodera rostochiensis and G. pallida) making these nematodes a threat to the entire potato industry. Their life cycle is completed in 38 to 58 days with longer time required at lower soil temperatures. Population increase varies from 10 to 35 fold per growing season with greater increases at lower population densities. There is only one generation per year. Encysted eggs can remain dormant in the soil for many years in the absence of a host. Only G. rostochiensis (golden nematode) is present in the United States and only in the State of New York where two pathotypes, Ro1 and Ro2, exist. Both G. rostochiensis and G. pallida are present in Newfoundland, Canada but only G. rostochiensis is known to exist on Vancouver Island. Only G. rostochiensis is reported from Mexico but other closely related Globodera species are also present. If left uncontrolled, the golden nematode can cause up to 80% loss in yield. Since the initiation of statutory control programs (quarantine and regulations) in North America, no yield losses have been recorded. Indirect losses are manifest in the expenses of managing the statutory programs and in restrictions of activities of other agricultural industries, which lowers the total agricultural income of the infested region. |
