Maple Tar Spot
Maple tar spot strikes again
M. Grabowski, UMN Extension Educator
Tar spot may look different on different
species of maple. M. Grabowski, UMN
For the second summer in a row, tar spot, a fungal leaf spot disease is showing up in large numbers. Tar spot causes large black raised spots on leaves. Black spots are often shinny and look like wet tar. Although the symptoms of tar spot are most dramatic in the fall, the fungus actually infects the leaves early in spring when wet weather coincides with spore release. The fungus can only infect leaves, and will survive Minnesota’s winter in fallen leaves within leaf spots.
M. Grabowski, UMN ExtensionTar spot is not a serious threat to the health of the tree. The leaf spots may cause leaves to drop a bit early but not early enough to do significant harm. Gardeners interested in reducing problems with tar spot in the following year should rake up leaves and place them in a back yard or municipal compost pile.http://blog-yard-garden-news.extension.umn.edu/2017/09/maple-tar-spot-strikes-again.html
Although summer may be coming to a close, it’s not too late to add some charm and color to your garden this fall with some perennial native grasses. Native grasses can liven up a planting with their interesting shapes and seasonal color changes and benefit multiple types of wildlife, including butterfly and moth species.
While most gardeners like to plant in spring or fall, you can find lots of deals on perennials, shrubs and even trees during the time from mid-June to September. But planting in summer works, too. As long as you are careful to water, most plants will do just fine if planted in mid-summer.
But here’s the catch with both summer and fall plantings: Whatever plant you buy, it has been sitting in its pot a long, long time and the roots are probably wrapping around the inside of the pot. Now is a time when a gardener needs to get rough.
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Poison HemlockPoison hemlock (Conium maculatum) is an invasive plant native to Europe and North Africa. It is highly toxic (i.e., fatal) to humans and livestock. Poison hemlock requires considerable sunlight to flourish and is found often near railways, rivers, ditches, field edges, farms and bike paths. It is a biennial plant (having a two year life cycle), and is unlikely to grow in very shady areas or places that are frequently mowed.
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If you have been spending time in your flower gardens recently, you may have noticed many brown and orange butterflies visiting plants to drink nectar. Adults of the Painted Lady butterfly, Vanessa cardui, are gathering at flowers in unusually large numbers to prepare themselves for migration down to the southwestern U.S. and northern Mexico. The Painted Lady butterfly is one of the most widely distributed of all butterfly species, but is not frequently seen in Minnesota most years. According to Chip Taylor, director of Monarch Watch at the University of Kansas, this is probably the largest migration he has seen in over 30 years (LJWorld.com September 8, 2017). These larger migrations often follow rainy periods in their wintering grounds.
Deer damage home landscapes by feeding on garden and landscape plants, rubbing their antlers against trees, or scraping the soil around trees.
In urban environments where native plants and alfalfa, corn and grains are not available, the home landscape may become the major source of food. In areas where deer are a problem, there are several options. You can reduce damage to the home landscape by growing plants which deer find unattractive, fencing the deer out, or using repellents.
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