Submitted to: Proceedings of the New York State Vegetable Conference
Publication Type: Proceedings
Publication Acceptance Date: 2/11/1997
Publication Date: N/A
Technical Abstract: At least 68 species of plant-parasitic nematodes have been reported associated with potatoes. Only a small number of these are known to cause serious losses in potato yields. The golden nematode (Globodera rostochiensis) is an economically important pathogen of potatoes throughout the temperate region of the world. In the USA, it occurs only in the state of New York where it is under quarantine. A 4-year management system consisting of two years of a resistant variety followed by one year of a nonhost crop with a susceptible variety the fourth year was developed. After 12 years of successful use of this system, a race of the golden nematode was discovered that overcomes resistance, rendering the system ineffective at some sites. Only two species of root-knot-nematodes are important in potato production. Miloidogyne hapla causes damage throughout the northern area of the temperate zone. A large area of the Pacific Northwest is also infected with M. Chitwoodi which is the most economically nematode pathogen of potatoes in the USA. The nematodes are currently being controlled with chemicals but efforts are underway to transfer resistance from wild species into usable germplasm. Root lesion nematodes cause potato yield losses in most production areas. They can be controlled with chemicals and cultural practices. Resistance to these nematodes has been identified but is not in commercial form.