The Environmental Protection Agency recently registered Quash fungicide from Walnut Creek, Calif.-based Valent U.S.A. Corp. for use on blueberries and potatoes.

The registration covers all bushberries included in EPA's Crop Subgroup 13.07-B, according to a news release.

Among those are highbush and lowbush blueberries, currants, elderberries, gooseberries and huckleberries.

The label expansion also covers potatoes.

The broad-spectrum fungicide, which contains the active ingredient metaconazole, had previously been registered for use on several other crops.

Most states also have approved the new uses, although registration is still pending at least in California.

In blueberries, Quash controls mummy berry, Alternaria leaf spot and fruit rot, and anthracnose fruit rot.

It also controls phomopsis diseases, such as leaf spot, twig blight and fruit rot.

In potatoes, Quash is effective against white mold, brown spot and black dot.

It also can be used as a resistance management tool as some organisms are growing resistant to strobilurin and SDHI fungicides.

Strobilurins, also known as QoIs, belong to the Fungicide Resistance Action Committee's Group 11.

SDHIs, known technically as succinate dehydrogenase inhibitors, belong to the FRAC Group 7.

Quash is a triazole and belongs to the FRAC Group 3.

Quash can be applied by air or ground to both bushberries and potatoes.