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Show Dairy Herd Spraying Will Yield Dividends May Mean $75 Extra Profit This Summer Spraying dairy cows with me-thoxychlor me-thoxychlor to control blood-sucking stable and horn flies, may mean at least $75 extra profit this summer, sum-mer, according to H. B. Petty, insect in-sect specialist in the Illinois college col-lege of agriculture. And the chances are good, he says, that profits from spraying may run much higher. Spraying dairy cattle is a big job for farmers, but it is one that should be done. Petty figures the potential $75 extra profit from spraying in this i Spraying dairy cattle is a big Job for farmers, but it will help build the type of clean, "contented" "con-tented" dairy herds such as that shown here. manner: You can get 15 per cent more milk up to September if you spray. This has been demonstrated1 by careful small-scale field tests. It is generally estimated that the average cow will give 1,700 pounds of milk during the four-month fly season. A 10 per cent boost instead in-stead of 15 per cent would mean 170 pounds of milk for that time. For a 15-cow herd, that would mean 2,550 pounds of extra milk from fly-control. Figured conservatively at $3 a hundredweight, that's just under $75 more in milk checks. And it costs only about 20 or 25 cents a head for spraying. Petty recommends spraying the Inside of dairy barns two or three times during the summer. He suggests sug-gests that the formula used provide for one pound of 50 per cent me-thoxychlor-wettable powder in two to four gallons of water to every 1,000 square feet of surface. Dairy cattle should be sprayed with methoxychlor every two to four weeks to control horn flies. The formula is one-half pound of 50 per cent powder in three gallons of water and apply one quart to each cow. |