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Showing posts from October, 2011

Disease Resistance of Cold Hardy Grapes

Michelle Grabowski, UMN Extension Educator



Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org
Photo 1: Anthracnose on grape berries

New research published in Plant Health Progress provides Minnesota grape growers with more information about disease resistance of cold hardy grapes. Canadian researchers tested several cold hardy cultivars of wine grape for resistance to Anthracnose. Anthracnose, a disease caused by the fungus Elsinoe ampelina, can infect leaves, tendrils, shoots, and immature berries of grape vines. Leaves have dark brown to black spots. As leaf spots grow, the center of the spot turns gray to white and eventually falls out. Leaves may appear peppered with small shot holes. Anthracnose lesions on stems and petioles are sunken oval spots that almost look like hail damage, but the edges Anthracnose spots will always be black. Berries infected with anthracnose have brown to black spots with a pale white center. These spots are often described as '…

The Beneficial Challenge

Karl Foord, UMN Extension Educator

Do you actually see things that you do not recognize? I was hunting for agates near Custer, South Dakota and went through a great agate field and picked a number of nice specimens. I then visited a rock shop and was introduced to the prairie agate which I had not seen in any of the rock books. I went back to the agate field and found quite a few prairie agates. I had been in that field earnestly searching for agates before and did not even see these types until pointed out at the rock shop. This begs the question, can you be looking right at something and not see it or rather not recognize it for what it is? It is not that your eyes did not see it but rather your brain was not ready to discern.

This brings me to the subject of beneficial insects in the garden. Have I not seen them because I did not know what I was looking for? As I look forward to next year's gardening, I want to put the idea of discovering more beneficials at the forefro…

Calendar: November 1, 2011

Dave Hansen, UMN


Last chance! The Arboretum Apple House will remain open until at least November 6. They have the best supply of Honeycrisp in years and have been picking some high quality late season apples this week. Whether you prefer a tart and juicy Haralson, a sweet Fireside or SnowSweet with a balanced flavor, you will find the apples you enjoy the most right now. For updates on the Applehouse inventory, call 952-443-1409. For more information about the Apple program at the U of M, please visit the U of M Apples website.



Dave Hansen, UMN
Chrysanthemums



Potted chrysanthemums in rich, autumn hues are traditional for Thanksgiving. Choose plants with some buds just opening, rather than in full bloom. They'll last three or four weeks when kept in a bright locations. Discard the plants once their flowers fade. It's not worth trying to plant them outdoors. Even though they might survive our winters, most florists mums won't bloom before hard frost, so they aren't use…