Production of disease-free seed

Dykstra, T. P.

doi:10.1007/bf02860103

Cited by 3 publications

(1 citation statement)

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“…Countries producing potato seed tubers have one or more certification programmes to ensure that potato seed tubers are free from major diseases, especially virus diseases and some bacterial diseases (Rowe, 1993). In most countries, rules for certification of potato seed tubers for fungal and fungus‐like pathogens allow for variable percentages of disease incidence and severity for each potato disease (Dykstra, 1948). These acceptance limits can sometimes exceed Jordanian standards and tolerance limits for imported seed tubers.…”

Section: Introductionmentioning

confidence: 99%

Prevalence of fungal and fungus‐like diseases on potato seed tubers imported from Europe to Jordan

Samen

Al‐Bdour²

2011

EPPO Bulletin

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A total of 109 samples of potato seed tubers imported to Jordan from France, Netherlands and Denmark during the 2007/2008 growing seasons were surveyed for 10 different diseases caused by fungi and fungus‐like organisms to determine the prevalence of different tuberborne diseases and to evaluate the efficacy of the current visual examination procedures in detecting different potato diseases. The results demonstrated that most potato seed tuber lots imported to Jordan were infected with one or more of the following potato pests: Colletotrichum coccodes (black dot) (66.0%), Rhizoctonia solani (black scurf) (42.4%), Helminthosporium solani (silver scurf) (92.6%), and Spongospora subterranea (powdery scab) (13.8%). Just over a quarter (25.7%) of all lots examined in this study were found to exceed the acceptance limits for one or more potato diseases according to the Jordanian standards. This study suggests that the current visual examination procedure is not adequate to detect all tuberborne diseases of potato and to estimate their incidence and severity precisely.

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Section: Introductionmentioning

confidence: 99%