﻿96 



BULLETIN 1369, U. S. DEPARTMENT OF AGRICULTURE 



Table 11. — Treatment of Hypoderma lineatum in the hacks of cattle, Dallas, 

 Tex., 1918-1924— Continued 



Material and strength 



PjTethrum flowers, 2 pounds; 

 carbon tetrachloride, 1 gallon. 2 



Pyrethrum flowers, 2 pounds; 

 kerosene, 1 gallon. 2 



Pyrethrum -kerosene extract, 2 emul- 

 sified with soap and water, 0.44 

 poimd per gallon of emulsion con- 

 taining 0.22 per cent oil. 



Pyrethrum powder (open flowers), 

 1 part; petrolatum, 2 parts. 



Pyrethrum powder (open flowers) , 



1 pound; soap, 4 ounces; water, 1 

 gallon. 



Pyrethrum powder (open flowers).. 



Silver nitrate, 5 per cent 



Silver nitrate, saturated solution... 



Silvol, 10 per cent 



Soap, 4 ounces; water, 1 gallon. 



Sodium chloride, saturated solution. 



Sodium chloride, dry 



Sodium fluoride, 75 per cent, satu- 

 rated solution. 



Sodium fluoride, dry 



Sodium hypochlorite, 1 ounce; 



water, 16 ounces. 

 Sulfur, 1 part; petrolatum, 2 parts... 

 Tobacco dust, fine, 1.08 per cent 



nicotine. 

 Tobacco dust, 1 part; petrolatum, 



2 parts; 0.33 per cent nicotine. 



Tobacco-dust infusion No. 1 ^ 



Tobacco-dust infusion No. 2 3 



Tobacco-dust infusion No. 3 ^ 



Tobacco-dust infusion No. 4 3 



Tobacco-dust infusion No. 5,3 0.22 

 per cent nicotine. 



Tobacco-dust infusion No. 6,3 0.22 



per cent nicotine. 

 Tobacco-dust infusion No. 7,3 0.22 



to 0.32 per cent nicotine. 

 Tobacco-dust infusion No. 8,3 0.52 



per cent nicotine. 

 Tobacco-dust infusion No. 9,3 0.51 

 to 0.54 per cent nicotine. 



Turpentine spirits, undiluted 



Do 



Disinfectant (phenol, boracic acid, 



alum). 



How applied 



Injected with oil can. . 

 do 



Washx)n back, 1 appli- 

 cation. 



Pressed into holes. 



Wash on back, 1 appli- 

 cation. 



Dusted into holes 



Injected with syringe.. 



do 



do 



Wash on back 



do 



Dusted into holes 



Injected with syringe.. 



Dusted into holes 



Injected with oil can. 



Pressed into holes. 

 Dusted into holes. 



Pressed into holes. 



Injected with oil can.. 



Wash, 2 applications 



on successive days. 



do 



Wash, 1 application... 

 Wash, 4 applications; 



2 on successive days; 



2 weeks apart. 

 Wash, 2 applications 2 



weeks apart. 

 Wash, 5 applications 1 



week apart. 

 Wash, 1 application... 



W^ash, 3 applications, 1, 

 then 2 one week later. 

 Injected with syringe.. 

 Injected with oil can.. 

 Injected with syringe.. 



87 



r 



391360 



39 275 

 44 336 

 18101 

 21 95 



7| 78 

 50 213 

 3 14 



Num- 

 ber of 

 grubs 

 killed 



Stage 



3 4 5 



76 



Num- 

 ber of 

 grubs 

 not 

 kUled 



Stage 



2 1 

 15 



201 



01 

 019 



16 81 010 

 3105 0| 1 



60147 



22I 15 

 117 



019 29 

 19 



Oi 4 

 010 

 32 



016 



013 



8 









 2 

 



40 



Num- 

 ber of 

 grubs 

 doubt- 

 ful 



3 4 5 



Num- 

 ber of 

 grubs 

 gone 



3 4 5 



23 

 0123 

 013 

 27 



Per- 

 cent- 

 age 

 killed 

 based 

 on 

 dead 

 and 

 alive 



100.00 

 94.22 

 18.29 



100.00 



15.71 



33.33 

 100. 00 

 100.00 

 92.31 

 00.00 

 14.29 

 22.95 

 62.50 



00.00 

 21.74 



55.55 

 85.04 



92.00 



43.53 



65.38 



76.74 

 41.89 

 69.58 



61.09 



81.37 



45.45 



85.29 



93.75 

 59.42 

 100.00 



3 These tobacco infusions, Nos. 1 to 9, were made with ingredients in the following proportions: No. 1, 

 4 pounds of tobacco dust, sufficient water to make 1 gallon; No. 2, 1 pound of English tobacco dust, 4 ounces 

 of stone lime, sufficient water to make 1 pint; No. 3, for first application, 1 pound of tobacco dust, 1 ounce 

 of lime, sufficient water to make 1 gallon; for second application, three-foui-ths pound of tobacco dust, 1 

 ounce of lime, sufficient water to make 1 gallon; Nos. 4, 5, 6, and 7, 4 pounds of tobacco dust, 1 pound of 

 lime, suflicient water to make 1 gallon; Nos. 8 and 9, 8 pounds of tobacco dust, 4 pounds of lime, sufficient 

 water to make 1 gallon. 



