Give apricots to the ball maker! These are what the differant apricots will make! As you can see Pokeballs arn't a no-brainer, like in R/B!

White Apricorn: Fast Ball  for catching Pokemon that try to exit the battle quickly. 
Red Apricorn: Level Ball for if your Pokemon's level is a lot higher than the wild Pokemon.
Blue Apricorn: Lure Ball for catching Water types when fishing. 
Pink Apricorn: Love Ball if the wild Pokemon's gender is opposite that of your Pokemon's you'll have an easier catch. 
Black Apricorn: Heavy Ball strong/big enough to catch heavy Pokemon like Snorlax. 
Green Apricorn: Friend Ball Pokemon caught with Friend Balls will become very attached to their trainer. Good for Chansey (if you want it to evolve into Blissey). 
Yellow Apricorn:Moon Ball good for catching Pokemon that evolve with Moon Stones, like Clefairy and Jigglypuff.