A takeaway curry customer opened a bag of poppadoms and found several cockroaches inside, a court has heard.
The insects were with a meal bought at the Twice the Spice takeaway in Larbert, Falkirk.
The sheriff said the incident would have been "deeply unpleasant" for the customer.
Mohammed Akram, 33, from Glasgow, pleaded guilty to selling the cockroach-infested poppadoms in December 2009 and was fined £600.
He also admitted moving the cockroach traps and failing to give information about the ownership of the curry house to environmental health officers when they visited on 16 January 2010.
Falkirk Sheriff Court was told that environmental health officers sent to the takeaway had found evidence of cockroaches.
Hayley Green, prosecuting, said: "I understand cockroach traps were put down by one of the environmental health officers and he was to return on 16 December to check them.
"But he couldn't do that because the traps had been removed from their position.
"On a further visit to the store, it was found that there was one area of the shop that showed signs of cockroach activity."
Ryan Sloan, defending, said Akram was not even an employee at the restaurant and had been "just helping out" his dad Muhammed, who owned it.
Mr Sloan said: "The shop was closed on 7 December while the situation was remedied and it is now under new ownership.
"He accepts he removed the traps from the designated position in the shop but he placed them elsewhere. He wanted to sort out the situation himself, and called in Rentokill."
Mr Sloan said his client admitted he had refused to give information to the officers, but had not wanted to get his father into trouble.
He added that Akram accepted full responsibility for selling the bag with cockroaches and was "deeply remorseful".
Sheriff William Gallacher said: "These are serious contraventions of environmental health laws.
"The incident relating to the cockroach would have been deeply unpleasant for the purchaser."
Akram's pleas of not guilty to seven other charges, which included tops, handles, and switches being encrusted with grease and dirt, were accepted by the Crown.