8 Farmers’ Bulletin 1185. 
STUBBLE SPRAYING NOT RECOMMENDED. 
Stubble spraying has been successfully done by a number of farm- 
ers, but it requires getting upon the field immediately after cutting, 
which is not always possible, and further, a much larger quantity of 
liquid per acre is needed than if it were applied to the first crop. In 
years when the damage to the first crop is slight it might seem more 
convenient to cut it first and then spray the stubble, but the results’ 
of many trials show that this is not usually true. ‘The time to poison 
the larve most easily is when they are feeding upon the tips of the 
first crop, and not when they are clustered below the surface of the 
Fic. 5.—Brush-dragged portion of field shown in figure 4. The uneven growth is a 
characteristic result of this treatment. 
ground upon the buds of the stubble. Stubble spraying can only be 
advised when earlier spraying has been impossible. 
PREPARATION OF MACHINERY. 
Before using spraying machinery it is necessary_to overhaul and : 
repair it. To make sure that the nozzles, hose, and connections, and 
the packing of valves, pistons, and cylinders are in good condition, 
the engine in working order, and the pump and pipes free from rust 
and scale, takes about three days, and should be done long enough 
in advance so that the necessary repairs will be finished in time. 
Spraying is less profitable if too much cleaning and repairing are left 
to be done after spraying begins, while the crew waits and the weevils 
destroy the hay crop. 
