The effect of different densities of Meloidogyne ardenensis and of three populations of M. hapla on the growth of tomato at four soil temperatures
1983
Stephan, Z.A. (Scottish Crop Research Inst., Invergowrie, Dundee (UK))
The effect of Meloidogyne ardenensis and three populations of M. hapla on the growth of tomato were compared at four temperatures. M. ardenensis caused greater plant height reduction at 15 than 18 deg C, the percent reduction was 27 and 20 respectively. Percent reduction in plant height caused by the American population M. hapla was 57, 43, 35 and 22 at 24, 21, 18 and 15 deg C respectively. The American and English populations of M. halpa were more damaging to tomato plants than the Canadian population and M. ardenensis. The American population was the only one which reproduced on tomato at all temperatures tested. M. ardenensis failed to produce at 21 and 24 deg C, the Canadian at 15 deg C and the English population at 15 and 18 deg C. At the higher densities (4,000 and 8,000 eggs), all the nematode species tested caused greater reduction in plant height, plant weight and root weights as compared to the control. The reproduction factor of the nematode species was negatively correlated with initial density.
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