Yield loss of carrot (Daucus carota) cv. Nerac caused by Meloidogyne chitwoodi and population dynamics of this nematode were studied using a range of 13 nematode densities at three seed densities (2, 4, 18 seeds pot−1) in a climate-controlled glasshouse. Yield and quality data were fitted to Seinhorst’s yield models. Final population densities were fitted to the population dynamic models for sedentary and free-living nematodes. The tolerance limits for yield loss were 0.34, 0.62 and 0.50, while that of quality were 0.012, 0.142 and 0.813 second-stage juveniles (J2) (g dry soil)−1 at increasing seed densities, respectively. The minimum yield (m), increased with seed density: 0.25, 0.30 and 0.50; the minimum quality yield was 0.10, 0.08 and 0.15 J2 (g dry soil)−1 at increasing seed densities, respectively. Both maximum multiplication rates and maximum population densities increased with increasing seed density but were generally low. Carrot cv. Nerac can be considered a bad host for M. chitwoodi.
NemaDecide: a decision support system for the management of potato cyst nematodes. In:
Potato in progress: science meets practice. Wageningen, The NetherlandsWageningen Academic Publishers pp.
BeenT.H.KorthalsG.W.SchomakerC.H.ZijlstraC. (2007). The MeloStop project: sampling and detection of Meloidogyne chitwoodi and M. fallax. Report Plant Research International 138. Wageningen The Netherlands Plant Research International.
Meloidogyne chitwoodi-maize root-knot nematode. In:
Jaarboek 1989/1990. Wageningen, The NetherlandsDirectie Gewasbescherming, Plantenziektenkundige Dienst pp.
Description and SEM observations of Meloidogyne chitwoodi n. sp. (Meloidogynidae). A root knot nematode on potato in the Pacific Northwest.
Journal of Nematology12319-327.
SantoG.S.O’BannonJ.H.NycepirA.P.PontiR.P. (1981). Ecology and control of root-knot nematodes on potato. In: Proceedings of the 20th Annual Washington Potato Conference Moses Lake Washington USA. Washington State Potato Commission pp. 135-139.
Host-parasite relationship of carrot cultivars and Meloidogyne chitwoodi races and M. hapla.
Journal of Nematology20555-564.
SeinhorstJ.W. (1988). The estimation of densities of nematode populations in soil and plants. Vaxtskyddsrapporter Jordbruk 51. Uppsala Sweden Sveriges Lantsbrukuniversitet.
The common relation between population density and plant weight in pot and micro plot experiments with various nematode plant combinations.
Fundamental and Applied Nematology21459-468.