Garden & Yard Issues

Spotted Wing Fruit Fly Damaging Fruit Crops

The spotted wing fruit fly is a new pest problem that originated in Asia and was only first identified here in the United States in California in 2008. It was first seen in South Dakota in 2013.

West Nile in South Dakota: Expect Cases Into Early Fall

While it’s true that in South Dakota most West Nile Virus cases occur during August, new human infections are detected well into September in most years.

Ash Tree Issues

Ash flower galls are appearing on the twigs of ash throughout the state. The brown to black “balls” hang in clusters beneath the branch shoots. The galls are due to the feeding activity of the ash flower gall mite (Eriophyes fraxiniflora) and this mite only feeds on the male flowers of ash.

Aphids On Trees

Aphids are appearing on many trees at this time of year and their activity is generally noticed by the abundance of honeydew they excrete on the lower leaves and any plants or objects beneath the tree.

Cottonwood Galls

Just about every year I receive samples of fallen cottonwood leaves with a “bump” at the base and the first one for this year was from Winner. This is the cottonwood petiole gall formed by the feed activity of a very small green aphid.

Leaf Blotches On Trees

I am receiving pictures and samples of basswood and linden leaves. This is a common occurrence at this time of year, and there are several possible reasons for the discoloration and premature falling of these leaves.

Woody Weeds: Tatarian Honeysuckle

Tatarian honeysuckle (Lonicera tatarica) was brought to North America from Asia in the mid-18th century for ornamental uses. In South Dakota it was also used as a windbreak species until the 1980s.