06 BULLETIN 1369, U. S. DEPARTMENT OF AGRICULTURE 
TABLE 11.—Treatment of Hypoderma lineatum in the backs of cattle, Dallas, 4 
Tex., 1918-1924—Continued ; 
oh =) | | 
}| 2 Num- | Num- 
a| 3 wee ber of | ber of Nom Pas 
2) | Der or | grubs | grubs | 2&8! © 
ee grubs not |doubt- grubs conte 
Material and strength How applied Sis based 
role on 
alle Stage | Stage | Stage | Stage | dead 
o|o 
2/8 and 
5 g alive 
2|2|3| 4|5|9/4)9|s/4]/a]4/s 
Pyrethrum flowers, 2 pounds; | Injected with oil can__|24/107| 8] 63) 35] 0] 0] | 0) G| 9} O! O} 1/100. 00 
carbon tetrachloride, 1 gallon.? | 
Pyrethrum flowers, 2 pounds; |____- O32 eee 20/173) 6/110) 47} 0) 2) 8] O| 0} 0} O} O} O} 94.22 
kerosene, 1 gallon.? | ; 
Pyrethrum-kerosene extract,?emul- | Wash on back, 1 appli- /12} 91) 0} 6} 9] 0! 9/ 58! 0} 0} O| 0} O| 9] 18.29 
sified with soap and water, 0.44 cation. | 
pound per gallon of emulsion con- 
taining 0.22 per cent oil. 
Pyrethrum powder (open flowers), | Pressed into holes_--_-- 22/100} 0} 8) 76} 0} 0} 0} O} O} 1} O} 0)15)100. 00 
1 part; petrolatum, 2 parts. 
Pyrethrum powder (open flowers), | Wash on back, 1 appli- | 8} 87] 0} 2) 9! 0} 2) 57] O} O| O} O| O}17) 15.71 
1 pound; soap, 4 ounces; water, 1 cation. 
gallon. x 
Pyrethrum powder (open flowers)__| Dusted into holes_-_-_-_- 1] 22); 0} 2) 2) O| 1] 7} O} 3] 7 O} O} O} 33.33 
Silver nitrate, 5 per cent____________ Injected with syringe__| 4] 30] 0} 0} 15] 0} 0} 0} 0} 0/15] 0} 0} 0/100. 00 
Silver nitrate, saturated solution___|_____ GOS eae 1] 20} 0} 0} 20! 0} oO} 0} O} O} O} O} O} 0/100. 00 
Silvol; Omer Cent == ie seee ee see | ae Goes 2 ae eee 2} 13] 0} 0} 12) O! O} 1) O} O} O} O} O} O} 92.31 
Soap, 4 ounces; water, 1 gallon_____ Wiashion backe === 1} 21] 0 0 0} 0,19; 0} 0} 0} O' O} O} 3} 00.00 
Sodium chloride, saturated solution_|_____ (6 Ua pet oes SO Gere 3} 21] 0] 0; 3) 0} 0} 18) 0} O} O} O} O} O| 14.29 
Sodium/ehloride; dry ee Dusted into holes____- 16) 91} 0} O} 14! 0} 2} 45] 0} 0/30) 0} 0; O} 22.95 
Sodium fluoride, 75 per cent, satu- | Injected with syringe__| 6] 22] 0} 1) 9] 6! Oo} 6] O} 3] 3] O| O} O} 62.50 
rated solution. ; | 
Sodium fluoride, dry___-__________- Dusted into holes____- 1} 3] 0] O} O} O} 1} 1} Oj O} 1} O} O} O} 00.00 
Sodium hypochlorite, 1 ounce; | Injected with oil can__| 6} 46) 1) 1] 8} 1! 2| 33] 0! O} O| O} O} O} 21.74 
water, 16 ounces. | 
Sulfur, 1 part; petrolatum, 2 parts___| Pressed into holes__-__- 15} 45] 1) 16; 8] 0.10} 10} 0} 0} 0} O} 0} 0} 55.55 
sOpateo dust, fine, 1.08 per cent | Dusted into holes_-___- 36/146) 0 RS 0} 1) 18} O} O} 0} O} 0/19} 85. 04 
nicotine. 
Tobacco dust, i part; petrolatum, | Pressed into holes___-_- 28/231) 0} 60,147; 0)14| 4} 0} 0} 0} 0} 0} 6; 92.00 
2 parts; 0.33 per cent nicotine. | | 
Tobacco-dust infusion No. 1 3_____- Injected with oil can__|12) 97] 0} 22) 15 olig 29) 0} O} 1; 0} O11) 43. 53 
Tobacco-dust infusion No. 23_____- Wash, 2 applications | 4) 27) 117 19 0} 0} 0} O} O} 1] 65.38 
on successive days. 
Tobacco-dust infusion No. 3 3______|____- C0 (0 eee Se 5] 87| O| 9; 57] O; 4! 16] O} 9} O} O} O} 1) 76. 74 
Tobacco-dust infusion No. 43______ Wash, 1 application___| 5] 77| 0| 4] 27] 010} 33] 0} 0} 0} Q} 0} 3} 41.89 
Tobacco-dust infusion No. 5,3 0.22 | Wash, 4 applications; |39/360| 0/128/103) 032] 69| 0] 4) 6) 0} 0/18] 69.58 
per cent nicotine. 2 on successive days; 
2 weeks apart. | 
Tobacco-dust infusion No. 6,3 0.22 | Wash, 2applications 2 |39,275] 0} 90) 56) 0/16] 77! 0] 8] 5) 0} 0/23) 61.09 
per cent nicotine. weeks apart. | 
Tobacco-dust infusion No. 7,3 0.22 | Wash, 5applications 1 |44 336] 0/134/115) 0.13] 44) 6! 4) 3| 0} 0!23) 81.37 
to 0.32 per cent nicotine. week apart. | 
Tobacco-dust infusion No. 8,3 0.52 | Wash, 1 application___|18/101) 0| 6} 34) 0) 8} 40) 0; 0} 0} 0} 0/18) 45. 45 
per cent nicotine. 
Tobacco-dust infusion No. 9,3 0.51 | Wash, 3-applications, 1,/21) 95} 0) 5} 53) 0} 2} 8) 0} 0} 0} 0} 0/27} 85. 29 
to 0.54 per cent nicotine. then 2 one week later. 
Turpentine spirits, undiluted______| Injected withsyringe__| 7} 78] 0] 0} 60) 0} 0} 4 0} 0/14) 0} 0} 0} 93.75 
IE) 8 ears Se ee I eee Injected with oil can__/50,213) 0} 2) 80) 0| 2) 54! 0} 1) 2) 0} 0/72) 59. 42 
ae (phenol, boracic acid, | Injected with syringe__| 3} 14] 0} 0} 9) 0) 0} 0} O} 0} 5} 0} 0} 0/100. 00 
um). 
{ 
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-fourths 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, sufficient water to make 1 gallon; Nos. 8 and 9, 8 pounds of tobacco dust, 4 pounds of lime, sufficient 
water to make 1 gallon. 
