I would suggest that you call the professional, especially if this wood damage is on your house or one of the outbuildings. Many times people will think they have eradicated the problem, only to find a whole wall needs replacing.
Here are some tips to try and keep them away:
Eliminate Moisture Problems
Repair leaking faucets, water pipes, and a/c units
Divert water from foundation
Keep gutters and down-spouts clean
Ventilate crawl spaces
Remove excessive plant cover and wood mulch
Get rid of standing water on roof
Keep all vents clear and open
Seal entry points around water and utility lines or pipes
Remove Food Sources
Keep firewood, lumber, or paper away from foundation or crawl space
Get rid of stumps and debris near house
Place screens on outside vents
Check decks and wooden fences for damage
Wood on your home shouldn't contact the soil
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