SURVEY OF PRUNE ORCHARDS:

This summary of nematodes found in prune orchards illustrates the principle that it is common for an orchard to have more than one species of plant parasitic nematode present.

The nematode found most commonly in this survey (pin) has been shown by Lownsbery to be pathogenic to prunes in greenhouse trials when present in high numbers but is not typically thought to be pathogenic under field conditions.

Of the nematodes found to be present, ring nematode is thought to be the most damaging to prunes followed by the lesion nematode, Pratylenchus vulnus.

If lesion nematode is found in an orcharcd situation, it is important to have it identified to species as there are several nondamaging species that may also be present.

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