Nematode Testing Symptoms of Nematode Damage
Nematode damage can vary depending on the crop, age of the crop and plant part affected.
Classic Symptoms Include: - Root Knots or galls
- Stunted growth
- Excessive root branching
- Lesions on roots
- Leaf stem or flower damage
Nematode susceptibility:
| Alfalfa | Root knot, Stem, Lesion | | Beets | Root knot, Cyst | | Bulb crops | Root knot, Stem | | Corn | Root knot, Stubby root, Lesion | | Grapes | Dagger, Ring | | Mint | Root knot, Lesion, Pin | | Peas | Root knot, Cyst | | Potato | Root knot, Stubby root, Lesion | | Raspberries | Root knot, Lesion | | Wheat | Root knot, Lesion |
Nematode Sampling
- Soil must be moist
- Sample size minimum of 1/2 soil bag. (If both nematodes and fertility are to be tested, soil bag must be full)
- Keep sample cool
Sampling hints:
Because nematode populations tend to be spotty and not uniformly distributed in a field, the more cores taken in an area the better the analysis results. If possible, sample to a depth of 12 inches and include small feeder roots in the samples.
Take a minimum of 30 cores for a given sample.
Sub samples in a field should be taken from areas with different crop histories. For example, a field planted to 1/2 alfalfa and 1/2 corn must have samples collected from each half.
Large fields should be quartered and samples collected from each quarter. Please be sure not to freeze or over-heat samples destined for nematode anslysis
Nematode Testing
Soiltest will be happy to split your soil sample and submit half for nematode asay to Northwest Nema Lab in Prosser while we perform chemical analyses on the other half. Pricing for 2008, which includes shipping, will be $30 if no root knot species are found and $42 if root knot are present. |
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