Gordon Couger writes

When did the UK start treating for warble files. I was treating cattle 30
years ago with systeminc insecticides.

I don;t know. We were already effectively clear when I came in 75.

We never used phosmet, by the way, few dairy farmers did.
They preferred the much less toxic tiguvon.

Phosmet tended to be used by beef farmers or those in remoter areas
where there were ticks.

--
Oz
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