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

• 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
• ISSN: 0014-3065; 1871-4528
• DOI: 10.1007/BF02358015

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.