Supermarket prices are on the rise as cases of coronavirus continue to increase around the country.

Key points: The price of fresh food has increased threefold in some places as the coronavirus spreads

The price of fresh food has increased threefold in some places as the coronavirus spreads Woolworths says price increases have come about due to a number of factors and that some produce is usually in short supply at this time of year

Woolworths says price increases have come about due to a number of factors and that some produce is usually in short supply at this time of year The ACCC says it cannot do anything to prevent "excessive pricing", but says it is illegal for businesses to make "misleading claims" about price hikes

South Australian disability pensioner Lynette Holmes can no longer afford several items on her shopping list due to the skyrocketing cost of fresh food.

The 64-year-old said she had seen supermarket prices soar in the past week just as new social distancing protocols came into effect.

"Seven dollars for lettuce is ridiculous and $15 for five kilos of potatoes is ridiculous," Ms Holmes said.

"I managed to get a four kilo bag [of potatoes] today for $5.80 at Woolworths.

"That was the cheapest I've seen around at the moment."

A 5kg bag of potatoes selling for $14.99 at an independent grocer. ( Supplied: Lynette Holmes )

Fresh produce 'triples' in price

Master Grocers Australia CEO, Jos De Bruin, said Ms Holmes' shopping experience had become a familiar story.

"We have seen the tripling in prices, and with items like lettuces up around the $10 mark at some [stores]," Mr De Bruin said.

"We've seen celery increase by three times, we've seen cauliflower increase in price."

At time of publication, prices for sugar snap peas at one supermarket were set at $6.99 each, a kilogram of Roma Tomatoes is $9.99 and one cauliflower costs $14.99.

Mr De Bruin said the food retail market has been rocked by panic buyers and people stocking up before self-isolating.

"[Australia's food retail market] was a market that's quite controlled, it's a market that's quite predictable," he said.

"Now we've gone into a market that's completely uncontrolled and unpredictable.

"The philosophy around economics is that prices go up, so scarcity drives prices up, and that's what's happening with our fruit and vegetables."

Fresh produce like carrots and potatoes are among food items priced higher in some outlets. ( ABC Riverland: Samantha Dawes )

'Huge added cost' for businesses

With demand outstripping supply, the food transport industry is under pressure and businesses are becoming strained.

"We [independent grocers] are doing a lot more online ordering, we're picking and packing orders, we're delivering for free," Mr De Bruin said.

"The cost to do business has gone through the roof, exponentially.

"So yes, people might see a huge spike in sales, but what people are not seeing is the huge added cost to do business."

Short supply, high demand

In a statement, Woolworths said price increases had been driven by a range of factors.

"We've seen an extraordinary level of demand for groceries across the country over the past week, including on fresh fruit and vegetables," a spokesperson said.

"This elevated demand has impacted the availability of a few vegetable lines that are typically in shorter supply at this time of year across the whole market.

"We're working closely with our fresh food suppliers to manage the impact of this increased demand, alongside the environmental impact of drought and unseasonal weather in different parts of the country.

"We understand the pressures facing Australian households right now and remain focused on offering quality fresh food to our customers at competitive prices."

Tomatoes are among several fresh food items priced higher than usual at some supermarkets. ( ABC Riverland: Samantha Dawes )

Retailers call for calm

Independent Retailers Association chairman Colin Shearing said it was time shoppers returned to their normal buying behaviour.

"What is happening at the moment is this ridiculous and absurd panic buying, thinking the world is going to end," Mr Shearing said.

"Just relax, go back to your normal buying habits.

"If everyone did that in Australia right now this would be resolved."

Mr De Bruin said prices would come back down eventually.

"When normality comes back, we will see all these prices come back to where they need to be," he said.

Stay up-to-date on the coronavirus outbreak Download the ABC News app and subscribe to our range of news alerts for the latest on how the pandemic is impacting the world

In a statement, the Australian Competition and Consumer Commission (ACCC) said it "cannot prevent or take action to stop excessive pricing".

"[The ACCC] has no role in setting prices," a spokesperson said.

"If a business makes misleading claims about the reason for price increases, it will be breaching the Australian Consumer Law."