Show r 1 1 Improved Sheep DI Dip P i Proves Proves Production AI Aid d Smaller Quantity of I. I Derris N Now ow A LATEST T boon for sheep raisers comes from the U. U S S. S department department department depart depart- ment of agriculture in the form of an effective economical and easily prepared dipping solution for ridding rid rid- ding sheep of ticks j I Six ounces of derris powder t containing 5 per cent rotenone are mixed with a little water to make a thin paste and then diluted in gallons of water Cube powder powder pow pow- der also containing rotenone may be substituted for derris Despite the limited supply of rotenone currently being imported into the U. U S. S flock owners may arrange arrange ar ar- range range for allocations to suit their needs Control of sheep ticks is one of the authorized uses Less than half as much derris or cube powder is needed to kill sheep ticks as was formerly thought necessary Dips made with derris or cube powders are not only easy to prepare prepare pre pre- pare but save labor since one dipping dip dip- dipping oJ ping is is enough Most other sheep dips commonly used required two 1 i 1 l y y 4 Only Tick-Free Tick Sheep Are Profitable I applications about 24 days apart the first to kill adult tick and the second to kill the new crop The rotenone in the new dip kills both the tick and the pupae in one dipping dipping dipping dip dip- ping and remains effective in the fleece for several weeks Another advantage of the method method method meth meth- od is that unheated water from practically practically practically any source can be used The presence of alkali or clay does not reduce the effectiveness of the new dip However pure clean water is best Veterinarians of the departments department's bureau hureau of animal industry animal industry studied the effects of dips of various strengths None of the dipped sheep nor their fleece suffered any ill ef ef- |