Answer
May 15, 2013 - 07:09 AM
It sounds like Subterranean Termites, as this species is the most common in your area next to Drywood Termites. Dampwood termites are actually rare, and occur more in the cool moist environments of Northern California, and the upper west coast.
The best thing to do for fence treatments for subterranean termites is -
#1 - make sure that there is a "gap" or distance of at least 1-2" between the bottom of the fence slats and the sod. Do not sit the fence slats on the ground. The wood will act like a sponge and draw moisture up like a "wick" in to the wood which will rot it out, and attract termites.
#2 - Use treated 2x6" runners or what is sometimes called a "mudboard" along the bottom of the fence. This makes the fence line look even, and also protects the slats long term.
3# - to control subterranean termites, simply treat the slats, and / or treat the ground below the fence with Termidor SC. This is done by digging a shallow trench below the slats and treating the soil at a rate of 4 gallons of mix per 10 linear feet of fence line. Simple to do. Just mix the Termidor in bucket and pour it in the trench. When dry, cover it up and rake the area smooth.
If you do all of this, and most importantly, use metal posts, metal brackets, etc, your fence will last for years. This is what I did for my fence 13 years ago, and with regular staining, it looks almost as good with no rot or termites today.
Ron
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