Golden Nematode Program Manual - Phytosanitary Resources

Procedures: Survey
Survey Times and Types
Post Resistant-Variety Treatment Survey
With the post resistant-variety treatment survey soil samples are
taken from infested fields where two successive crop years of resistant
varieties have been grown as the primary control treatment. Soil
samples are collected following harvest of the second annual crop of
resistant varieties after a field is found infested. This procedure is
used as the primary control treatment.
Methods used for post resistant-variety treatment survey includes-0
the manual survey or the mechanical (wheel) survey.
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Manual survey should be done using the 4-by-4 block method
Mechanical (wheel) survey should be done at the 200,000 cyst
per acre level
All cysts must be nonviable. If the post-resistant variety treatment
survey is negative and the grower chooses to use crop rotation, then
the field will be extensively surveyed again after the first-year
susceptible crop varieties are grown.
If the tests confirm all cysts are nonviable after the extensive the
follow-up survey and the approved crop rotation system is not
violated, then further survey does not need to be conducted.
If there is any indication that approved cropping sequences are not being
followed, then surveys should be resumed immediately.
Important
Rested Field Survey
If requested by the farmer(s) and the land is to be removed from
host-crop production during that year, then the land normally
scheduled for fall survey (post-crop) in a particular year may be
sampled in the spring of the same year.
Rested field survey methods include systematic manual soil sampling
and mechanical (wheel sampling).
11/2007-01 Golden Nematode Program Manual 2-3-11
PPQ