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AgAlerts 2001 From Griggs County
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Issue # 11, August 9, 2001
On the night of August 7th a major storm went through Griggs County and caused damage to crops and personal property. Hail caused major crop damage in the southern half of the county. Size of the hail ranged from pea sized to baseball sized. The following pictures show some of the damage that occured.
(click on photos to enlarge)
An old landmark in Cooperstown badly damaged in storm. The Cussons seed house on the west side of Cooperstown had severe wind damage during this storm. This landmark will most likely be torn down.
Several questions concerning the yellowing of
Canada thistle and whether this will cause it to die. Richard Zollinger,
NDSU Extension Weed Specialist offers this report. "Yellowing on the upper part of Canada thistle plants is due to a natural biological agent (Psuedomonas) found in nature. It only
yellows upper plant material, may temporarily stunt shoots but WILL NOT kill shoots. University of MN has done considerable
work to isolate the agent and find a way to formulate and market the agent with only limited success. There is not a marketed
product on the market yet".
(click on photos to enlarge)
The Barnes County Weed Officer found spotted knapweed on land bordering Griggs County. This is a very fast spreading noxious weed. Efforts are on the way to try and control this weed before is spreads from this area. Rod Lym, NDSU Weed Specialist, says spotted knapweed is able to out compete leafy spurge. In the states of Wyoming and Montana, landowners have more problems with spotted knapweed than with leafy spurge. To learn how to identify spotted knapweed, we have a bulletin "Know your Knapweed, W - 1146" available through the Extension offices or on the NDSU Extension website. This is an excellent publication explaining the life cycle, identification and controls of knapweeds found in North Dakota. The Griggs County Weed Board is asking for your help in finding any patches of spotted knapweed so we can prevent the spread of this weed.
Brown
spot is a disease that is favored by wet weather. Symptoms of the disease
are small, dark brown, irregular spots with or without a yellow halo.
Lesions may enlarge and coalesce, and frequently they are concentrated along the
leaf veins or at the leaf margin. The disease decreases with warm, dry
weather. The past two weeks have been ideal conditions for this
disease. The following pictures show some of the symptoms of this
disease. Notice the leaf damage due to the break out of the diseased areas
of the leaves. There is no treatment for control of this disease other
than crop rotation or tolerant cultivars.
(click on photos to enlarge)
Please Contact Our Office For Additional Information
E-mail: griggs@ndsuext.nodak.edu
Go to the 2001 AgAlert Index Page