Applications for the funds opened this month, and claims can also be made retrospectively for spending back to February 1, 2021.

The rebates are part of the NSW government's $150 million mice support package.

NSW Farmers vice president Xavier Martin encouraged primary producers to apply.

"Like many farmers across the state, our family has spent a small fortune on zinc phosphide baits to combat the mouse plague," he said.

"The good news is that applications are now finally open for the state government's zinc phosphide baiting program and I would encourage farmers to get in early to secure the rebate.

"This is an opportunity to prepare for spring when mice populations are predicted to swell.

"NSW Farmers thanks the NSW government for this practical support measure.

"...This support recognises the immense impact this plague has had on so many farm businesses already.

"I have heard some really horrendous stories about the impact of this mouse plague and the costs involved in trying to save crops and fodder has been significant."

Dubbo MP Dugald Saunders said many farmers were preparing to fight a spring surge in mouse numbers after a winter lull.

"The rebates now available through the NSW Rural Assistance Authority will assist eligible primary producers lay down defences against that spring surge by covering 50 per cent of the cost of purchasing zinc phosphide baits, up to $10,000," he said.

"These rodents pose a serious threat to the upcoming harvest so we want to ensure our farmers have the support they need to bait their paddock and protect their crop."

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