As humanity's most pressing health crisis plays out across the globe, Australian consumers appear to be rushing to boost their immunity with locally grown vegetables.

Key points: Demand for locally produced fruit and vegetables is strong amid coronavirus fears

Demand for locally produced fruit and vegetables is strong amid coronavirus fears Some WA producers say it is the best year they have had in a decade

Some WA producers say it is the best year they have had in a decade On the flip side, the global health crisis could lead to a shortage of overseas workers

Broccoli grower Brad Ipsen said demand for the vegetable was the strongest he had seen.

Mr Ipsen, who is based in the West Australian food bowl of Manjimup, works in one of the few industries enjoying a windfall from the COVID-19 pandemic.

"This season has been really good … with the latest impacts with coronavirus and health issues, vegetables are a vitamin pill themselves," he said.

"But I think that's widespread too, other people are telling me the same thing.

"Prices have been strong across all vegetable commodities — demand has been good."

Brad Ipsen says the stars have aligned to create one of the best seasons he's had in years. ( ABC South West: Zoe Keenan )

Mr Ipsen said after years of volatility the stars had aligned to position the industry to reap the benefits of strong demand, solid prices and high-quality produce.

"We didn't really predict it was going to be this good, but the indications were that there were water shortages in the production areas on the east coast, but no-one really foresaw how that would impact us."

Fruit and vegetables help prevent illness

Dieticians said they were encouraged by consumer behaviour given the health benefits in preventing illness and disease.

Margaret Hays from the Australian Dieticians Association said people underestimated the importance of consuming fresh fruit and vegetables to prevent becoming sick.

"Eating fresh fruit and veg gives us a really big intake of antioxidants, which is really helpful for boosting our immunity," she said.

"My advice to people who are trying to prevent coronavirus getting to them and to their families, is to eat as healthy as you can.

"Get two pieces of fruit a day, lots of vegetables — up to five servings a day — lean meats, fish, chicken, vegetarian sources of proteins — nuts and seeds — and low-fat dairy products."

Broccoli growers say demand is the highest they have seen in a decade. ( ABC South West: Zoe Keenan )

Supermarket demand grows

Vegetables WA chief executive John Shannon said that while not all primary producers were benefiting, the majority of the state's Midwest and South West were in a good position to capitalise on growing demand.

"We're hearing anecdotally that supermarkets are selling a large amount of fresh produce, as well as the canned produce, because consumers are lining themselves up to improve their immune systems," he said.

"I think certainly there's been increased demand because of the difficulties over on the east coast with drought and bushfires."

Nutritionists are urging people to eat more fresh fruit and veg. ( ABC South West: Zoe Keenan )

Lack of overseas workers

But the pandemic could prove a double-edged sword.

The horticulture industry relies on overseas labour, and while availability of workers is steady now, some producers expect it could affect the workforce in coming months.

"We'll probably have threats to the availability of labour, so while it's great to see consumption levels staying high, let's be realistic about where this may lead for the industry into the longer term," Mr Shannon said.

The biggest downfall COVID-19 presents the industry is a shortage of overseas workers. ( ABC South West: Zoe Keenan )

Mr Ipsen said if the supply of overseas workers dried up due to coronavirus, it would be a devastating blow to his business.

"Labour at the moment is OK, we've got the staff we need … we could see a shortage down the track in six months if this virus locks down the world," he said.

"For a crop like ours, which is all hand-harvested, and a lot of crops in this region are hand-harvested, that's a big issue."