Strategies
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Tactics
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A. Reduction of the
initial population.
B. Reduction of the rate of population increase.
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a) Location
- Select a geographic area unsuited to the target nematode species.
- May involve land purchase, lease, or realistic crop selection for
that area
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A. Reduction of the
initial population.
B. Reduction of the rate of population increase.
C. Increase in carrying capacity.
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b. Selection of planting site
- Use known distribution of nematodes on farm, based on
environmental conditions, cultural history, etc.
- Select soil or climatic conditions that favor crop and disfavor
nematode
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B. Reduction of the rate of population increase.
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c. Selection of planting date
Put target nematode at a disadvantage, e.g.,:
- Planting date for potatoes in Scotland to avoid Globodera
rostochiensis is a classic example; cv. Epicure sprouts at 4 C -
so it may be planted before the nematode becomes active.
- Sugarbeets in Imperial valley - if planted in January and February,
they may be harvested earlier, thus less nematode damage will
occur than if planted in March.
- Carrots planted in the Imperial valley in mid-September when soil
temperatures have dropped below 18 C can escape damage from Longidorus
africanus.
- Carrots in Kern County may escape root-knot damage if planted
after January 15 following cotton, but not following alfalfa.
(Cotton supports Meloidogyne
incognita while alfalfa may support several species,
including M. hapla, which is active at lower temperatures).
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B. Reduction of the rate of population increase.
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d. Early harvest
- Avoid extra generations and damage to root crop, e.g., potatoes
grown in the Tulelake region of California. But, this practice shortens the
growing season.
- Early plowdown of cotton. R-6-P (reduce 6 pests) in North Carolina tobacco.
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A. Reduction of the
initial population.
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e. Clean planting stock
- Nursery stock certification.
- Clean seedlings (seedbeds,
sweetpotato slips, etc.).
- Consider transplant shock effects.
- Use seedlings produced elsewhere may allow early start.
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