SJC and Delta Field Crops

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Stem nematodes are visible under a dissecting microscope emerging from an alfalfa stem.

Alfalfa Stem Nematode

April 2, 2025
By Michelle M Leinfelder-Miles, Mick M Canevari
A crop consultant brought in some stunted, seedling alfalfa plants and asked us to help identify the problem. The plants came from a field in the southwest part of San Joaquin County that was only planted about three months ago. After looking at them under the dissecting microscope, we came to the conclusion…
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