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Wisconsin Crop Manager, Volume 14 Number 13 May 31, 2007
Wisconsin Crop Manager WCM issue files By WCM Staff on 5/31/2007 5:27 PM
WCM May 31, 2007 compiled issue for print or download
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Field Notes: Remember Insect Scouting on Alfalfa 2nd Crop Regrowth
Wisconsin Crop Manager Insects and Mites By WCM Staff on 5/31/2007 12:59 PM
A reminder to watch 2nd crop alfalfa regrowth for remnant alfalfa weevil larvae and adults. UW-Extension Fond du Lac Crops/Soils Agent, Mike Rankin sent the featured pictures here on May 22nd. Mike reported significant alfalfa weevil larval feeding pressure along the east shore of Lake Winnebago.
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Field Note: Soybean aphids detected on soybeans last week of May
Wisconsin Crop Manager Insects and Mites By WCM Staff on 5/31/2007 12:57 PM
Soybean aphids have been detected on V1 soybeans. This is not unusual as we know soybean aphid egg hatch and initial generations occurred on the overwintering host buckthorn earlier this spring.
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Weed ID Pop Quiz
Wisconsin Crop Manager Weeds By WCM Staff on 5/31/2007 12:47 PM
Here are a few weeds that have been sent in for identification in the past couple weeks. Test your weed identification skills before looking at the answers below.
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Dust Interferes with Glyphosate Activity
Wisconsin Crop Manager Weeds By WCM Staff on 5/31/2007 12:44 PM
Dust could affect glyphosate’s activity because glyphosate is tightly bound by soil, which is the reason why glyphosate lacks residual activity. On a leaf, the glyphosate could bind to the dust and not be available to be absorbed into the leaf.
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Is a Residual Needed with Post Corn Herbicides?
Wisconsin Crop Manager Weeds By WCM Staff on 5/31/2007 12:33 PM
I have received a few calls about the need for residual activity with postemergence herbicide applications in corn. I’m going to focus on grass weeds, which were the basis for the calls. Article by Chris Boerboom, Extension Weed Scientist
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May 30, 2007, Vegetable Disease Update
Wisconsin Crop Manager Veg Crop Update By WCM Staff on 5/30/2007 4:39 PM
W. R. Stevenson: Rain continues to be the biggest story or rather the lack of rain. Many growers pre-irrigated their fields just before planting to restore soil moisture after a dry spring. This likely paid dividends in terms of keeping seedpiece decay to a minimum.
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May 30. 2007, Vegetable Insect Update
Wisconsin Crop Manager Veg Crop Update By WCM Staff on 5/30/2007 4:31 PM
Russell L. Groves: Onions - In 2006, onion growers experienced high populations of onion thrips (Thrips tabaci). Hot and dry conditions during mid summer contributed to elevated onion thrips populations. So far in 2007 we have observed ...
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May 30, 2007, Potato Crop Update
Wisconsin Crop Manager Veg Crop Update By WCM Staff on 5/30/2007 4:27 PM
The snow storm on April 12th led to the one of the latest potato plantings in Central Wisconsin in recent memory. Weather since has been seasonable which allowed growers to catch up with planting schedules and led to crop emergence by early to mid-May in Central Wisconsin. by Alvin J. Bussan
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Wisconsin Vegetable Crop Update May 30, 2007, Issue #1
Wisconsin Crop Manager Veg Crop Update By WCM Staff on 5/30/2007 2:06 PM
Wisconsin Vegetable Crop Update May 30, 2007 compiled issue for print or download.
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Wisconsin Crop Manager, Volume 14 Number 12 May 24, 2007
Wisconsin Crop Manager WCM issue files By WCM Staff on 5/24/2007 7:55 PM
WCM May 24, 2007 compiled issue for print or download
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Hill Mustard, an invasive mustard on the move in Southwestern Wisconsin
Wisconsin Crop Manager Weeds By WCM Staff on 5/24/2007 12:26 PM
A new invasive mustard called Hill mustard has recently been observed spreading throughout the southern part of the state.
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Bean Leaf Beetles are Active, Scout Emerging Soybeans
Wisconsin Crop Manager Insects and Mites By WCM Staff on 5/24/2007 12:21 PM
Bean leaf beetles have begun to emerge in the region. Bean leaf beetles overwinter as adults beneath leaf litter. In early spring, adults feed on cultivated (alfalfa) and wild (e.g. showy tick trefoil) legumes. As soybean seedlings emerge, beetles move into soybean fields to continue feeding and lay eggs.
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Labelled Stages for Postemergence Herbicides in Corn
Wisconsin Crop Manager Weeds By WCM Staff on 5/23/2007 4:58 PM
In regards to postemergence herbicides in corn, I think these three simple rules capture most of what needs to be said.
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The decision to irrigate - Irrigation Economics
Wisconsin Crop Manager Crops By WCM Staff on 5/23/2007 2:51 PM
Given that some regions of Wisconsin (notably northern) have not received adequate rainfall thus far, questions on irrigation may arise. Included below are some helpful references for you and/or your clients to consult when considering the purchase of irrigation equipment.
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Early-Season Weeds in Corn
Wisconsin Crop Manager Weeds By WCM Staff on 5/23/2007 2:05 PM
Postemergence herbicide programs in corn should make growers and agronomists think hard about the question of “When does weed competition start to affect corn yield potential?” A few bushels lost to weed competition can easily result in a $10/a or $15/a loss or more.
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Frost Impact on Corn at Early Growth Stages
Wisconsin Crop Manager Crops By WCM Staff on 5/23/2007 10:52 AM
Over the last couple of nights (May 17 and 18) a light frost hit much of Wisconsin. Farmers are reporting frost damage to corn and other crops over widespread areas in northern Wisconsin and scattered low spots further south.
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