Golden Nematode Program Manual - Phytosanitary Resources

Procedures: Preparation, Disinfection, and Clean-up
Survey Preparation
Confirm the reason to conduct the survey falls under a category listed
above. Continue to Step 2: Determine the Type of Survey to
Conduct.
Step 2: Determine the Type of Survey to Conduct
Field soil sampling is used for detection and delimiting purposes. The
pattern and number of samples to be taken will vary depending upon
the likelihood of infestation, acreage involved, personnel available, and
other factors.
The first-line supervisor or Program Manager will decide which type of
survey to conduct based on the results of the initial survey or
confirmation survey.
Survey Types
1. Prior to beginning the survey work, contact all growers involved
in the survey to inquire and determine whether the growers have
encountered any trouble spots in potato fields or tomato fields.
(See Plant Damage on page 2-1-6.)
2. Visit the proposed survey site. If the soil is too wet, then do not
conduct the survey until the soil is dry.
3. Obtain a GIS map of the site.
The survey types available are:
◆ Confirmation survey (see page 2-3-10)
◆ Grader survey (see page 2-3-9)
◆ Manual survey/systematic manual soil sampling (see page
2-3-4)
❖ 8-by-8 block method (see page 2-3-5)
❖ Simplified 8-by-8 block method (see page 2-3-6)
❖ Modified 8-by-8 (4-by-8) block method (see page 2-3-6)
◆ Mechanical survey/wheel soil sampling (see page 2-3-7)
◆ Nursery survey (see page 2-3-9)
◆ Peripheral survey (see page 2-3-10)
◆ Post crop survey (see page 2-3-10)
◆ Post resistant variety treatment survey (see page 2-3-11)
◆ Rested field survey (see page 2-3-11)
◆ Selected area soil sampling (see page 2-3-8)
◆ Symptom survey (see page 2-3-12)
◆ Survey to release land from exposed status (see page 2-3-12)
◆ Survey of seed potato production areas (see page 2-3-2)
2-2-4 Golden Nematode Program Manual 07/2008-01
PPQ