The striker was back to his best for victory over Fiorentina.
"Balotelli is an important player for the national team, like a lot of other players," Prandelli said.
"But he must arrive at the World Cup fully prepared.
"It would serve Balotelli well to listen to Seedorf and to use the emotions he is feeling to express himself out on the pitch.
"When an emotion is channelled well it is always appreciated.
"He is in good hands, Seedorf knows how to handle great champions as he was one himself. Balotelli has always behaved well with the national team."
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