Chemicals Rats Bees Birds Fish Human Life
Pyrethroid  
  Permethrin 4 6 3 5 4
  Deltamethrin 4 6 3 6 3
  Bifenthrin 5 6 3 6 3
  Cypermethrin 4 6 2 6 4
  Cypermethrin 4 5 3 5 3
Dieldrin   5 4 5 5 4
Chlorpyrifos   4 5 5 6 4

*(6) - Extremely Toxic (5) - Highly toxic (4) Toxic (3) - Slightly Toxic (2) - Practically Non toxic (1) - Relatively Harmless