THE AQRIOULTUIIAL NEWS. 



How Ticks 

 Reduce the Milk Yield 



An Important Matter for Owners of Dairy Herds 



•ATTLS TIOH 



VKt fUbwlng infcrmalhn It ta^tn fnm Farmtrt !B»ttetin, No. 639, laued officially hy the 'Department of Agrlcii!lurc of the Vnllei Slolrt. 



Tlw •dual amount oi harm whicb licki ito to cattle u no longer a matter of mere conjecture. But the need of deBri:e knowledge on iliii tob^M^ 

 led Am DajiwtAMDt to coodsct kmm cxparineDti on the effect of ihe lick on milk production and on the body weightt of dairy caMle. 



RESULTS OF EXPERIMENTS 



Foriy COW! were divkled into 2 lou oi 20, each of whicii was producing practically the same amount of niilta a«<l wa< given the tame feed and 

 care (or an average of 1S2 <laya, during the season most favourable to the development of ticks. 



One of the lots in each esperilMat wai allowed to become infested with ticks, while another wa^ kejjt free fr«a ihem — in one case ty sprcjing 

 and in anoilier by dipping. 



The main results of the experiment were as follow a : 



1. Cowi c*rr}'ing ticks did aol bold up so well in milk Bow as cows kept free from licks, and did not increase their flow of milk when ihe 

 feed was increased, as did the tick-free cows. 



2. At the close of the experiment the cows lightly infested wiih lick> were producing IS'' l«s miik than the cows kept free (rem ticki, 

 practically If pints less per cow per day. 



3. At the end of the expeiimenls the cows heavily infested with ticks were producing 42.4' less milk than the lick free cows, or ne-arly 

 one-hall gallon le» per head per day. 



4- Oaring the experiment period of one of the tests, which included 20 cows, the heavily inle>u>d cows lost an averasre of 9.3 poundt ip 

 weight, while the tkk fre« cowt gained an average of 44.2 pounds, although both were fed alike. 



1 



THE COST OF FEEDING TICKS 



If a pen keep«r or dairymaa with 20 cows, each producing 8 quarts of milk a day, should let them become lightly infested with ticks, the milk 

 induction would be dacrauad to tbc czlenl of 1 ^ quarta a day for each cow. 



At as low an estimate of 20 ctntt. a gallon or 5 cents, a quart, this wenid amount to 7i ceott. or $ \M (or the entire herd of 20 cows each day. 



If the tick infestation were heavy the reduction in the milk yield would be 3.3 quarts a da> for each cow. equal to 17 ccnls. in milk values. 



This would amouDt to ^ 3.40 a day for the herd of 20 cows. 



The following it aa actual ezpcricBce cl a dairyman in a very heavily tick infested territory, which strikingly illustrates how heavy is ih« 

 «a*t ol feeding ticki. 



Lata in ibe aeaaoa wfaaa hi* emn were covered with licks, the cattle were dipped and the ticks killed. One w«rk after dipping ilie 42 c»wt 

 in kn herd gara 10 gaOena •! aaDk more than before dipping. This was an increase of 16.6',> and as the .i.lk was bringing 35 cenlt. a 

 jiBrn Ibe eatra 10 gaWaiil wmn woitb $ 3.50. Hence, as a result of being freed from ticks by dipping, the sai\ie 42 cowt, on the same lea^ 

 prailii »H atttt wft HtSaiMl la mtrmm tba dairyman'f profits by $3.50 per day, or -$1277.50 per annum. 



idtarfc 



IT COSTS MORE TO FEED TICKS THAN TO KILL THEM 



4 MMi •■nan wil work together iIm ticks can t>e eradicated. Complete eradication, and not merely wppcaiiiaa. 

 TIm ^tff*^ tank, or spraying machine, makes the work easy, eSectiTe and practical. 



COOPIR'S CATTLE TICK DIP 



raetivJ tha official approval of tht following Countri—: 



Oafan of South Africa. Northern Rhodesia. Brazil. Banitoland. 



Myaaaland. Swaziland. Southern Rhodesia. Mada£a.scar. 

 BriUah Eaat Africa. Qerman East Africa. PortuKuese East Africa. 



faHimliu West Africa. Egypt. Arfeotine Republic. QuMonlaod. 



Onitod States of Amorioa. New South Walta. 

 Northern Territory of Auatralia. 



WEST INDIAN AGENTS: 



KlaDafacturers 



aiANCIIES 



WILLIAM COOPER & 



Ckieaja, iji—t, 



ANTiaUA : Bennett. Bryaon ft C«., 5t. . 

 BAHAMAS: H. T. Bricc, Nassaa, N.P. 

 BARBADOS : Barbados Co-operative Cotton Co, B>Mr»t»YB. 

 BRITISH aUIANA: T. Oedde.i Orant. Lt<L 

 DOMINICA: Hon.H. A.Prampten. QRBNAUA: Thomson, M anfc ayOOi 

 OUADBLOUPi; : The Station Agrronomlaue de la t 

 Polnt-ii-Pltre. JAMAICA: O. Henderaon A Co.. 

 MARTINIOIIH: L. Duplan & Co., PMt.4«4>ra 

 MONT5BRRAT: W. Uewellyn WaU. NBVI5: 3. D. MatHtt. 

 ST. KITTS: S. L. Horstord A Ca. ST. LUCIA: Banur4 Saaa * C*« 

 Castrlea. ST. VINC8NT: Caroa ft Ca.. «— ala»» 



TRINIDAD ft TOBAOO: T. OoMaa iltmmL LM. ' 



AMERICAN VIRQIN ISI-ANIWi O. N. S«baiaa«lBV, M. CMth. 



NEPHEWS, Berkhanuted, EnglaML 



AifM. MeaU VUm, 



