Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 346100
Title Growth duration and root length density of Solanum sisymbriifolium (Lam.) as determinants of hatching of Globodera pallida (Stone)
Author(s) Timmermans, B.G.H.; Vos, J.; Stomph, T.J.; Nieuwburg, J.G.W. van; Putten, P.E.L. van der
Source Annals of Applied Biology 148 (2006)3. - ISSN 0003-4746 - p. 213 - 222.
Department(s) Crop and Weed Ecology
Publication type Refereed Article in a scientific journal
Publication year 2006
Keyword(s) potato-cyst nematodes - infestation foci - g-rostochiensis - trap crops - soil - cultivars - diffusate - movement - decline - host
Abstract Solanum sisymbriifolium is a trap crop for potato cyst nematodes (PCN). In this study, we quantified the effect of different periods of growth of S. sisymbriifolium and root length density on hatching of Globodera pallida, using potato and fallow treatments as references. One-year-old and 2-year-old G. pallida cysts were used in greenhouse experiments carried out in containers over 2 years. Two methods were used in study hatching. In the first method, 7.5-cm-diameter soil cores were removed and backfilled with infested soil. In the second method, cysts were buried in nylon bags. The soil cores infested with cysts used in the first method had very poor root colonisation as compared to surrounding bulk soil. Therefore, the effect of S. sisymbriifolium was strongly underestimated by the soil core method. Hatching of PCN juveniles from cysts, measured with the nylon bag method, increased with the duration of growth of S. sisymbriifolium from 47% after 6 weeks of crop growth up to 75% after 21 weeks of crop growth. Reductions per depth layer were also correlated with root length density and varied between 42.6% at 0.26 cm cm3 and 85.3% at 5.8 cm cm3. Based on a single exponential decay function, a general method is presented to estimate for any PCN management measure the average reduction in the number of years needed to ensure that the PCN population falls below a given density. Calculated reductions in the number of years ranged from 2.3 years for 59% hatching (equivalent to 90 days of S. sisymbriifolium) to 4.4 years for 75% of hatching (equivalent to 150 days of S. sisymbriifolium). These reductions were independent of initial and final population density. Our results corroborate the hatch-inducing effect of S. sisymbriifolium, underline the importance of growth duration and root length density as determinants of the reduction in PCN population that can be achieved and draw attention to the pitfall in methodology that can arise in the study of hatch stimulation
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