One man was taken to hospital after eating a strawberry with a needle inside.
Authorities in Australia on Thursday said they had four confirmed incidents of "contaminated strawberries" after an individual reportedly discovered a needle inside a berry after taking a bite.
The Queensland premier, Annastacia Palaszczuk, has issued the reward over concerns for growers as well as consumers.
'This is food terrorism that is bringing an industry to its knees, ' Strawberries Australia Inc Queensland spokesman Ray Daniels said.
The Donnybrook supplier owns three farms in south-east Queensland and supplies to both Coles and Woolworths.
Officials said it is still safe to buy strawberries but consumers should cut them up before eating them.
"We found 3 pins inside 3 strawberries", Faugeras wrote.
Investigators plan to do forensic testing on the needles and say they're particularly focused on how the fruits were transported.
"The safety of our customers is our priority and anyone concerned about their health should seek medical advice".
ABC News reported on Saturday that wholesale prices have halved to 50 Australian cents per punnet below the cost of production in Western Australia, where strawberries crops are now peaking, with growers forced to dump tonnes of the fruit.
Despite the nation-wide fear, strawberry farmers have asked consumers to still purchase strawberries but chop them up the first. "Regretfully, preventing random acts of extremism, sabotage and simple maliciousness from people with a grudge appears to be an increasing challenge across our society".
Police are also investigating a copycat saboteur after a Coles employee at a Gatton store, about 90 kilometres west of Brisbane, found a "small silver rod" on top of strawberries in a punnet.
"We've got to look at this as a whole, it's a very, very broad picture and we can't speculate in any way, shape or form", Queensland Acting Chief Superintendent Terry Lawrence said.
Three brands-Donnybrook Berries, Berry Licious, and Berry Obsession-have been taken off the shelves completely.
Health officials have urged people purchasing the fruit to be cautious.
Certain brands have been removed from sale.