Type.....and effectiveness.....of control probably depends on number of head among other things; 10 head? 100? 1000? When I was in the business, I tried pretty much every thing on the market, back rubs, 'fly' blocks, sprays, pour-ons, tags, etc. The blocks only work if your cattle are 'isolated'; if your neighbor(s) have cattle across the fence, you'll get a continual re-infestation.......if he doesn't control his'n. For the last 20 years that I had cattle, I found the ear tags to be the most effective/least trouble; when I bought my last ones (tags), they didn't offer season-long control, so I had to plan on either replacing them or go to a back-up plan towards the end of the year. It's been my experience that nothing will work unless you work at it.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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