Golden Nematode Program Manual - Phytosanitary Resources

Procedures: Survey
Survey Times and Types
Survey to Release Land from Exposed Status
Important
Exposed land is not eligible for a survey to release land from exposed status
until the following both of the following occur: five (5) years after the last viable
infestation is known to have occurred on a particular grower’s land; and the
required negative survey has been accomplished.
To establish eligibility for a survey to release land from exposed status,
the exposed land must meet the following minimum criteria:
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Five years must have passed after the last viable infestation is
known to have occurred on a particular grower’s land; the five
years are counted starting after the required negative survey has
been accomplished
Five host crops (potato) minimum must be planted on the
exposed land before the survey can be considered
The survey to release land from exposed status must be conducted at
the 200,000 cyst per acre level or less, in the top 4 inches of soil, and
no sooner than the fifth (5) host-crop year.
Surveys for
Surveillance
Surveys will be conducted after harvest to take advantage of soil
mixing which occurs during harvesting operations. The survey method
may be manual or mechanical (wheel). If a manual survey is used,
then the 4-by-4 block method or 2-by-2 block method will give the
desired level of detection. All surveys must be negative (negative
survey).
Surveys for surveillance purposes may made prior to the fifth
host-crop year.
Survey Outside Regulated Areas
Surveys may be conducted outside of golden nematode regulated
areas, except in New York State where surveys are conducted in
suspect areas. A biometrics survey of major growing areas may be
made periodically.
Symptom Surveys
Symptom surveys are conducted in potato and tomato production
areas throughout the United States.
Symptoms of golden nematode infestation include stunting, yellowing,
and failing of crops (crop failure). Infestation symptoms occur in a
spotty manner in the field. These spotty areas tend to elongate in the
direction of cultivation due to the spread of golden nematode by
machinery.
2-3-12 Golden Nematode Program Manual 11/2007-01
PPQ