-60- 
Hyoodermol, end Kur-Mange. 
An enonvmous (3) writer in 1932 zeve en eccount of en exhibit 
et the Royal Dublin Show by the Educational Section of the Irish 
Free State Department of Agriculture, showing the damage to hides 
ceused by ^erbles. Samples of derris root, derris powder, end the 
derris wash reedy for use egeinst ox ^erbles w ere shown by the Irish 
representetives of Cooper, MecDougall end Co., "1th the slogan "Cattle 
dreed the warble fly. The marble dreads derris ponder. Hah it into 
him." 
Campbell (50) in 1932 reviewed unpublished <"ork of ""'ells, ^ho 
tested rotenone for the control of the common cettle grub, ^e ep-olied 
to the backs of infested cettle dusts conteining 0.5 to 2.0 percent 
of rotenone end cottonseed oil conteining 0.5 percent of rotenone. 
Best results r ere obteined with the letter mixture, 94 percent of 
the grubs being killed in e ^eek. The dusts killed ebout 75-percent, 
"ells concluded thft thoroughness of application is more importent 
than the percentege of rotenone in the mixture. 
Davie s end Jones (59) in 1932 compered the effectiveness of derris 
wash (l lb. derris ponder, 1/4 lb. soft soep, 1 imp. gel. ^eter) end 
cube wash for the control of ox derbies. In criticel tests where e 
nash of cube-root ponder "es used et the strength of 1 pound of cube 
root per gellon a 100-percent kill wes obteined. At 1/4 Pound per 
gallon a few marbles remained alive. Dry derris powder gave e kill 
of 95.1 percent and the derris wash e kill of 100 percent. 
ffotze ( 122 ) in 1932 recommended suspensions of derris in soap 
.solution as by fer the most suitable me?ns of treating warble fly 
lervee. One kg. o t ~ finel^ ground root of Derric meleccensis ^es 
steeped in 9 liters of cold water for 24 hours, with freauent shaking. 
Just before use, e solution of 250 gm. of soft soap in 1 liter of 
water was added. The mixture was not filtered. Decomposition took 
place after ebout a week. This mixture was. rubbed thoroughly on 
the animal's beck and repeated after. 2 or 3 days. Each application 
required about 250 cc. of the solution. No harmful effects on the 
animals '"ere noted. The control was said to be 95 percent. 
The Department of Agriculture of the Irish Free State ( 147 ) in 
1932 described experiments made in Ireland in 1930 end 1931 with Polvo 
(ordinary powdered derris root) for the control of ox warble's. It 
was recommended in preference to A atekille end Cooper's !ferble Fly 
Powder, but soft soeo must be used along with it. Tests are also 
described with Katakilla, Paregrad, Cooler's Werble Fly Powder, 
Cooper's Cattle and Warble Wash, ?nd Cooper's Warble Fly Dintment. 
The Isle of Men Board of Agriculture (149) in 1932 reported 
the control of the ox warble fly. Reference is made to the "orccster- 
shire Experiments on the control of this insect. The best dressing 
considered to be Folvo powder 1 pound, soft soer> 1/2 pound, weter 
2 imperiel gallons. 
