OFF TO LENINGRAD:

Nance Frank, skipper of the Annapolis-based U.S. Women's Challenge for the Whitbread 'Round-the-World Race, is off to the Soviet Union to participate in the annual Onega Regatta July 24-Aug. 6 on a lake north of Leningrad.

Frank and fellow Annapolitan Virginia Wilson will sail with a Soviet women's team. They are being sponsored by Western International University, an entrepreneurial school in Arizona, and by the USSR Women's Sailing Association.

TROUT TALK:

Maryland's Department of Natural Resources will hold a public meeting on planned changes in trout regulations at 7:30 p.m. Thursday at Martin Luther King Junior High in Beltsville. Among items under discussion: designation of 12 new put-and-take trout streams; making a stretch of the Gunpowder River catch-and-release; expanding the trophy area on the Savage River in Western Maryland.

TREE HUGGERS:

Finally, the Audubon Naturalist Society reports that a lethal wild dogwood fungus called anthracnose has been spreading south into the District, Maryland and Virginia.

Flowering dogwoods being among the sublimest spring pleasures hereabouts, it is worrisome news. The fungus was first reported in Massachusetts early in the 1980s, the society reports, and has been working its way steadily south.

Diseased leaves curl up and remain on the tree through the fall, long after other trees' leaves have dropped.

Lack of rainfall seems to foster the fungus's growth. Advice to dogwood lovers: Keep a four- to six-inch mulch around the base; water weekly in dry weather but avoid wetting leaves; fertilize in early spring and late fall with a balanced fertilizer, not a high-nitrogen lawn food; cut off diseased leaves and branches as they appear and clean clippers with bleach.

For more information, contact James Sherald at the National Park Service's Center for Urban Ecology, 342-1443.

HUNTING SHOW:

Maryland's only hunting show will be held July 27-29 at the Howard County Fairgrounds in West Friendship. There will be seminars on all aspects of hunting, contests and supplies for sale. Admission: $4 adults, $2 children. For more information: (301) 922-0538.