Conclusion
Houseflies preferred to breed on hen feces. Treatment of feces
with biological control agents may help to control such vectors
of diseases. B. thuringiensis H-1 is an environmentally safe bioinsecticide
and proved its toxicity against different stages of
houseflies. B. thuringiensis H-1 proved its efficiency as feed
additive to reduce pupal and adult percentages of houseflies
in poultry houses. Its use with repeated doses every four days
is recommended.