There's a similar information I posted for Pokemon Sapphire but this time, I'm posting this for Pokemon Black & White. With extra information about new Pokeballs introduced in later Generations. (This does not include Heart-Gold & Soul-Silver Pokeballs because they're exclusive to those games.) And in Generation V, they introduced Critical Capture which acts like landing Critical Hits. (Explained later...)

Capture Rate - Wild Pokemon's HP

• Full (Green) health [1.0] (Harder to catch)
• Half (Yellow) health [1.5] (Somewhat easier to catch)
• Critical (Red) health [2.0] (A lot easier to catch)

Capture Rate - Status Conditions

• None (Normal Condition) [1.0]
• Poisoned [1.5]
• Burned [1.5]
• Paralyzed [1.5]
• Sleep [2.0]
• Frozen [2.0]

Capture Rate - Pokeballs

• Pokeball - A standard Pokeball that captures Pokemon [*1.0]
• Great Ball - A Pokeball with a higher catch rate [*1.5]
• Ultra Ball - A Pokeball with more higher catch rate [*2.0]
• Master Ball - A Pokeball with a 100% guaranteed capture on any Pokemon [100% Capture]
• Premier Ball - A special Pokeball that goes along with 10 purchased Pokeballs [*1.0]
• Timer Ball - A special Pokeball that has a better catch rate as the battle continues (*1/10 Turns) [*1.0 - *4.0]
• Repeat Ball - A special Pokeball that has a better catch rate if caught the same Pokemon [*4.0] If not, then [*1.0]
• Luxury Ball - A special Pokeball that makes a Pokemon friendly (Base happiness will be 200 instead of 70) [*1.0]
• Dive Ball - A special Pokeball that has a better catch rate if battled in water [*3.5] If not in water, then [*1.0]
• Net Ball - A special Pokeball that is effective on Bug and Water Pokemon [*3.0] If they're not Bug or Water, then [*1.0]
• Nest Ball - A special Pokeball that works effectively if the user's Pokemon level is higher [*1.0 to 3.0]
• Dusk Ball - A special Pokeball that grows effective in capturing Pokemon at night or in caves [*3.5] if not, then [*1.0]
• Heal Ball - A special Pokeball that heals all the status conditions and restores HP when caught [*1.0]
• Quick Ball - A special Pokeball that has a better catch rate if used in first turn [*4.0] if later, then [*1.0]
• Cherish Ball - A special Pokeball that is used to signify Special Pokemon (Normally not obtainable) [*1.0]
• Park Ball - A special Pokeball, only in Sinnoh, that has a guaranteed capture [100%]
• Dream Ball - A special Pokeball that appears in your inventory while you're in High Link, has a guaranteed capture [100%]

Catch rate - Critical Capture
Critical Capture was introduced in Pokemon Generation V (Black & White). How the Critical Capture works is that when a Pokeball stops in the mid-air and makes a noise, it will catch the Pokemon inside the Pokeball and shake only once, then stops moving and goes dim--a capture. Critical Capture acts like landing Critical hits with an attack move except it rarely fails. It doesn't happen often but it will be handy for capturing Pokemon. Almost like a guarantee capture but yet to be known.

Here's an additional information about the Critical Capture. Enjoy.

Hope this helps you all. Enjoy capturing Pokemon in your journey.