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| Seasonal population cycle of ring
nematodes from the Willamette Valley. Population dynamics of mint and stubby-root
nematodes also are shown. |
Population dynamics of ring,
mint and stubby-root nematodes are basically similar and appear to be related to the
dynamics of root growth. Densities of all three species increase in the spring after the
peak in root growth, decline after the decline in root weight, increase again after the
summer flush in root growth and decline after the drop in root biomass following harvest.
There is also some indication that stubby-root nematodes increase again in late fall but
they probably decline rapidly again during the winter. |
