The England and Wales Cricket Board have suspended Azeem Rafiq following his personal attack on England Under 19 team manager John Abrahams.
The Yorkshire all-rounder hit out at Abrahams on social networking site Twitter after being dropped for disciplinary reasons.
Rafiq was captain of the Under 19's but was left out of the side to play Sri Lanka in the second 'Test' when his habit of staying out beyond mid-match curfews became an issue.
He appeared before a discipline commission panel comprising Edward Slinger, Ricky Needham and Matthew Wheeler.
The 19-year-old pleaded guilty to charges of breaching ECB directives and bringing the game into disrepute, while he also apologised unreservedly for his actions.
Rafiq, who had already been suspended by his county, was handed a one-month ban and also ordered to pay £500 towards the costs of the hearing.
"The panel ordered Rafiq to be suspended from all cricket under ECB jurisdiction for a period of one month from 26th July and ordered him to pay £500 towards the costs of the hearing," an ECB statement read.
"The panel considered this to be a serious breach of the regulations particularly given Rafiq's position as captain of the England U19 side."