fewer bot flies to annoy them the 
following summer. 
Two kinds of treatment are need- 
ed—external and internal. The exter- 
nal treatment may be given by the 
owner to rid the animal of the eggs 
of the common bot fly. The internal 
treatment should be given by a vet- 
erinarian about a month later to rid 
the animal of the larvae of any of 
the three species. 
External Treatment 
This treatment consists of applying 
warm water to the animal to hatch 
the eggs of the common bot fly. The 
best time to give the treatment is 
about 30 days after the first frost, 
when adult bot flies have disap- 
Part of horse’s stomach heavily infested with bots. 
peared—about November in the 
North and December in the South. 
By this time most of the eggs of 
the throat and nose bot flies will 
have hatched, and most of their lar- 
vae will have passed to the stomach. 
The animal may still harbor many 
eggs of the common bot fly, and lar- 
Unless 
these eggs are destroyed and 30 days 
vae may be in the tongue. 
are allowed for larvae in the tongue 
to pass to the stomach, heavy infes- 
tations may develop even after the 
larvae are killed in the internal 
treatment. 
The treatment for destroying com- 
mon bot fly eggs: 
e Heat water to between 115° and 
120°, 
If you have no thermome- 
M & A 4283 
Note the lesions that 
these bots have caused. 
