Be careful when using different types of bombs, here is a list of what bombs work on.

Flash Bomb:
Works well on small monsters (like *prey and *drome), doesn't work on sand monsters (Cephalos/drome) or the Gypceros (swamp wyvern), unwise to use on Yian Kut-Ku if you are a blademaster.

Sonic Bomb:
Works best on mediocre wyverns. Used mainly to scare sand wyverns (Cephalos/drome) up to the surface and making Yian Kut-Ku go crazy.

Dung Bomb:
Doesn't work on most wyverns or monsters. Best used on large wyverns such as Rathalos, Rathian, Diablos or Monoblos.

Sm Barrel Bomb:
Good for killing large monsters (like Velocidromes) to small wyverns (like the Yian Kut-Ku). Be careful when using on 'easily angered' wyverns, as they may get more aggresive and do more damage with less reaction time for attacks. Be careful to get away, these are time bomb and you have about 5 seconds to get away once placed. Works for scaring wyverns to the surface.

Large Barrel Bomb:
Best for most wyverns. Require physical impact to explode, best way is to throw a stone at them to set them off if you are an accurate thrower. Best not used if you are bad at dodging.