BLUEBERRY rust, a fungal disease that poses a serious threat to some berry ­orchards, has been found on 38 properties by biosecurity ­officers.

Surveillance for the disease has been ongoing following detection of infected plants in a shipment from Victoria to Tasmania in September last year.

More than 65,000 blueberry plants and 26,000 potential host plants have been inspected throughout Tasmania. About 200 blueberry plants have been confirmed with the disease.

The declared plant pest has the potential for significant impact on berry industries in Tasmania.

The blueberry industry has up to 20 growers, from large commercial operations to smaller producers growing for markets.

Biosecurity Tasmania chief plant health manager Andrew Bishop urged Tasmanians to help ensure blueberry rust did not establish.

Blueberry plants bought within the past six months should be checked for signs of rust. Signs of the fungus become evident in warm, humid weather conditions. Any that look sick or show signs of rust should not be touched or moved.