Relationship between potato cyst nematodes and their principal host. III. Consistency and accuracy of nematode density--yield descriptors as influenced by seasonal variation

SummaryIn three seasons, 21 potato cultivars, ranging in maturity from very late to mid-early, were grown on sandy and sandy peat soils naturally infested with potato cyst nematodes. The levels of infestation ranged from very low to very high. Between growing seasons, weather conditions differed gre...

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Bibliographic Details
Published in:Potato research 1997-01, Vol.40 (3), p.335-344
Main Authors: Mulder, A, Wal, A.F. van der, Velema, R.A.J
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
air temperature
Biological and medical sciences
Consistency
crop yield
Cultivars
Cysts
Density
Fundamental and applied biological sciences. Psychology
genetic resistance
Genetics and breeding of economic plants
Globodera pallida
Globodera rostochiensis
Growing season
growth
infestation
Mathematical analysis
mathematical models
Nematodes
Peat
Peat soils
Pest animals
Pest resistance
Phytopathology. Animal pests. Plant and forest protection
plant parasitic nematodes
population density
Potatoes
Protozoa. Invertebrates
rain
Records, symptoms, damages, economic importance, population surveys
Sandy soils
Seasonal variations
Seasons
seedling emergence
Solanum tuberosum
tolerance
Varietal selection. Specialized plant breeding, plant breeding aims
Weather
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Summary:SummaryIn three seasons, 21 potato cultivars, ranging in maturity from very late to mid-early, were grown on sandy and sandy peat soils naturally infested with potato cyst nematodes. The levels of infestation ranged from very low to very high. Between growing seasons, weather conditions differed greatly from very dry and hot to rather cool and wet.The data obtained were used to establish the effect of different growing seasons on the initial nematode density — tuber yield relationship and to evaluate the fit of the several equations describing this relationship. Over the three experimental years, the equations elaborated by Oostenbrink (1966) and Elston et al. (1991) described this relationship with the most accuracy and consistency.There were high year effects on yield, but as tolerance was not affected by the yearly fluctuations, the results suggest that testing for tolerance can be adequately done in any single year.
ISSN:0014-3065
1871-4528
DOI:10.1007/BF02358015