OCR Text |
Show Lice Inflict Heavy Damage on Cattle DDT Treatment Cuts High Winter Losses Lice are injurious to all types oi cattle. Animals produce less meat and milk if lice are unchecked. Young animals and poorly-nourished old animals sutler most from lice. The winter season is the time lice are bad on cattle. The louse population popula-tion builds up then. Dr. Harold Gunderson, extension entomologist at Iowa State college, says one louse unchecked in fall means 1,000 the following March. For lice control on cattle, DDT is being used successfully. Early in fall, before cold weather arrives, H is mixed with water and sprayed on the animals. After cold weather comes, a DDT dust is recommended. Farmers are being advised to use a dust containing 10 per cent DDT. Some of the powdered louse killers on the market contain less than 10 per cent DDT, but have other effective ef-fective insecticides combined with the DDT. The rotenone dusts recommended for cattle grub control can be used for lice control. Usually they are diluted for lice, to cover greater area and reduce the cost. For instance, in-stance, one pound of a cattle grub dust containing 1M; per cent rotenone rote-none can be mixed with two pounds of flour to make an effective louse killer. |