10 BULLETIN 245, U. S. DEPARTMENT OF AGRICULTURE. 
TaBLe V.—Destruction of fly larve in horse manure. Results with aniline, hellebore, 
nitrobenzene, and pyridine; open-pile experiments, New Orleans, La., 1914. 
aie! Emergence} 4» arent 
Serics Treatment: 5 gallons liquid added to 4 bushels of manure; Pupe from sam- Taeeaciaan 
: 4 applications. found. ple of 200 fect a 
pupe. effect. 
Per cent 
Number. Per cent of control. 
A Pycidine; 15008 oa eae Be ia oe te ieee Ay 750) | esac tee 98. 
Taille’ 2 AO Or verse es cee eye tate ain he can Spe tte ec cer aera a b,9483)| Gee je 99+ 
41<C eatin 1400 ee Ss ets eae EE Oh ees Soe ee 70)}642 1 Sea soe aes 79.4 
DS anes Oars oe SOR Sen Sie Bene be sue ae aes a ate HO. O50) | hee 83.5 
E> |e Control: ce sacs os eons es Sa ns see Ere ee B42, 711 noes deee sel Soeted s aeeee 
A | Nitrobenzene, 1 pound and 4 pound fish-oil soap to 10 gal- 
MONSSWaALEL2 Set ees ee ee eee Se Sic an Me ener n em e/a me EE LOD a ee oer 75.0 
Ba |peene GORE See eee ee eae ee oe mise ee 925 7/ilg| eee 76.0 
42)C | Nitrobenzene, 4 pound and + pound fish-oil soap to 10 gal- 
LONSS WATER sees ee eee ae ee eee eee aie (AS63GEle Sees 80. 6 
Dales OM Seas eiee ae ees ote Reais ae See iad QO: OBA Tiree 76.0 
Mie CONCTO lee on ns ie ors emer Oreee ine ene eee ee aie eeine S385 A08 Soo 2 eet te ee | eee tees eae 
A ee ground, 4 pound to 10:eallons water =. <.2.--2--!| > 564))_ 52.2 2 ee 99+ 
Ba Se OF sec e see ee Se es ae eee Nee a ane Se ae as Seen Litt | ease 99+ 
434 C iiellebore, ground, 4+ pound to 10 gallons water...--.---... 135265 el eae eee 95 
1 DY ay ats (ieee age Soe WEL ante ase Aimee Nucchines Sostgt Casi toil 75261" eee 93.7 
E Contre BE OEE EAS OOS SGOT OO Ee SEE 213; 0209 Sete ea ee eee 
A ene, (S500 Es aoe Quaee oe Baase ne cas eee Seen Bee eae] 1,707 67.0 84.2 
BA eee On mai! cations Oe oc mama ee Ee Rc Bathe Se ee REA | 1, 603 74.0 83.6 
49,C iietebor, powdered, 4 pound to 10 gallons water....-...-- 502 52.0 96. 4 
Dee SOR RMR ASH CESS. os ee er eas te eis eee ince ee nele | 162 ; 43.0 99.0 
E Gontrol Gwateronlliy,) Sas ot se hres Aen ine anya We 202 Tis kc ae | ea 
A | Hellebore, powdered, 4 pound to 10 gallons water.......-..- 398 49 97.8 
IB | eee 6 Kesey Res eres Sana eres taet re ieuaie reas i is oat Gaara A Baas 293 49 98. 4 
FDO ie ae GO Seer ee seen e Sse eee ei cece SERENE 449 40.5 98.0 
DiS Ose Se. Se See eee eee eee Me Ree 334 40.5 98.5 
BiaControli@vaterionly,) aawaa- sass eae ease ere ees 8, 866 OR eee | Nero 
A | Hellebore, powdered, 4 2 pound to 10 gallons water Dae heey 7 23.8 99+ 
Bae COR Sa e S eae a ge en ea, en ees ie sn eee 14 23.8 99+ 
515C | Hellebore, powdered, + pound to 10 gallons water.......... 12, 294 TA) 80.0 
Dee She G24 eee Ee ome eee Se Ree ee ee 24, 233 71.0 60. 0 
BaControliGwateronly.)t22eeseen tent te ee eee shee ames | 43, 733 COTS er) ena ASE 
A | Nitrobenzene, } pound and 1 pound fish-oil soap to 10 gal- | 
LODSSWATCT are aerate eo ISk eee eae Re ee 3, 036 63 93.4 
BS aleeeee CLO Be aie ae I cheat re (eens es cya oe Rie rage 3,415 63 92.8 
C ee powdered, 3 pound to 10 gallons water_....... | 24,346 95. 8 0 
5g BP eas ae0 Oana ke cS sada soass5n20 obec ed bac qunenaussnansoesess | 31,379 95.5 0 
“|E Teligbore, powdered, 2 pound to 10 gallons water.......-.- | 7, 694 95 75.5 
BET 3) Oe Ress Cd ae Sys eee Ss oy eh cea Race i Pe ek ea epg | Dt20 95 81.8 
G pores powdered, 1 pound to 10 gallons Waler= S52 Sheeans | 1,390 8.5 99+ 
ET Peel err Ae oncom eee Seek as SAE a eee | 953 8.5 99+ 
L Control Qwaleronliy) Secs erie toss facto eae ee eee | 29, 831 98. ballans Se aeeereaees 
As only one duplicate set of open piles treated with aniline 1 to 
200 was examined, the data are not sufficient on which to base any 
conclusion as to its effect on the bacteriological and chemical compo- 
sition of the manure. Aniline in all open-pile experiments showed 
a high larvicidal efficiency even in the dilution of 1 to 500, but it 
should be handled with care because of its possible toxic effects. 
BETA NAPHTHOL. 
Beta naphthol was tried in three cage experiments, using solutions 
containing 0.1 pound, 0.33 pound, and 1 pound, respectively. Where 
the 1-pound application was made only 11 per cent of the maggots 
were killed, and in the other two cases the results were negative. No 
bacteriological or chemical examinations were made of the treated 
manure. 
