18 Farmers' Bulletin 1057. 



Table 1. — Time required to free pastures from tides by starvation. 



BASED ON DATA OBTAINED AT DALLAS, TEX., AND AUBURN, ALA. 



w 



Date of removal of all animals from 

 pasture. 



Julyl 



Aug. 1 



Sept.l 



Oct. 1 to Nov. 1, inclusive. 

 Dec.l 



Date 

 when 



pasture 



will be 



free 



from 



ticks. 



Mar. 1 

 May 1 

 July 1 

 Aug. 1 

 Aug. 15 



Date of removal of all animals from 

 pasture. 



Date 



when 



pasture 



will be 



free 



from 



ticks. 



Dec. 15 to Mar. l'>, inclu-sivc 



Apr. 1 



Apr. 15 



May 1 to Jiuie 15, inclusive ' Nov 



Sept. 1 



Sept. 15 



Oct. 15 



1 



BASED ON DATA OBTAINED AT KNOXVILLE, TENN. 



Jan. 1 



Feb. 1 to Mar. 15. 



Apr. 1 to 15 



May 1 



May 15 to June 1 . 



June 15 May 



July 1. 



July 15 



Aug. 1 to 15... 

 Sept. 1 to Oct. 



June 

 July 

 July 

 Sept 



1 

 15 



1 

 15 



15 



The first i)art of the table is based on investigations by Hunter 

 and Hooker^ at Dallas, Tex., and by Graybill at Auburn, Ala., under 

 cooperation between the Bureau of Animal Industry and the veteri- 

 nary department of the Alabama Polytechnic Institute.- All the 

 periods obtained by Newell and Dougherty (190G)^ in work carried on 

 at Baton Rouge, La., which is much further south, are shorter. The 

 periods given in the table should be found ample for all places 

 no further north than Dallas, Tex., or Auburn, Ala. 



In general, moisture and cold prolong, while dryness and heat 

 shorten, the duration of the period that ticks will live on a pasture. 

 If some portions of the same pasture differ with regard to tem- 

 perature and moisture, as frequently happens, some parts become 

 free of ticks before others do. Other things being equal, high, dry, 

 unshaded land becomes tick-free sooner than low, damp, .shady land. 

 Land, however, that is excessively moist and extremely shady, as 

 along some river bottoms, is not likely to be a favorable breeding 

 place for the cattle ticks, and lowlands subject to more or less regu- 

 lar overflows, as a rule are only lightly infested, if at all. 



The time required for freeing pastures in the southern part of the 

 infested area may be considerably less in many localities than that 

 indicated in the fii-st part of Table 1, yet the safest plan is to follow 

 the table in most localities in the South. There is little doubt that 

 in most regions in the northern half of the infested area the i)eriods 



> Bulletin T2, Hurcau of Knt<)ni(il(if,'y, TT. S. Dopnrlnicnt of A;;riculturi'. 



» IJuUctln l.'iO, IJurcau of Animal Industry, U. S. Dcparluu'Ut of Aj;riculture. 



» Circular 10, State Crop Pest Commission of Louisiana. 



