-7- 
Larvicides 
House fly larvae in poultry manure can be destroyed with sprays. 
Applications are usually made with hance sprayers and must be repeated every 
week or two. Water-base sprays, as indicated in the table, have been found 
to liquefy the manure in many humid localities. Oil-base sprays do not 
cause liquefaction and are equally effective. 
Bait stations in use among cones of manure in a poultry 
house. 
AGRICULTURE-WASH INGTON 
