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Soybean Aphid update |
Wisconsin Crop Manager
Insects and Mites
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By WCM Staff on
6/25/2008 2:32 PM
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Soybean aphids made their debut in early vegetative soybeans in Wisconsin over the last two weeks. Reports in this article are from V2 to V4 soybeans. Populations are not of economic concern at this time. Weekly soybean aphid scouting should begin by late vegetative soybean growth stage and before early reproductive stage (beginning bloom). It is a good idea to monitor soybean fields for arrival of soybean aphid and colonization in your fields while checking soybean stands.
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Wheat Head Scab Beginning to Occur in Wisconsin |
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Wisconsin Crop Manager
Plant Disease
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By WCM Staff on
6/25/2008 10:15 AM
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Wheat head scab (synonym, wheat head blight), caused by several species of Fusarium, but in the U.S., mainly Fusarium graminearum, was noted in a routine survey of the winter wheat variety trials during the week of June 16th (Figure 1). This was not an unexpected discovery given the recent weather conditions during the flowering period.
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European Corn Borer update |
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Wisconsin Crop Manager
Insects and Mites
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By WCM Staff on
6/23/2008 2:54 PM
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Degree Day accumulations suggest the southern ½ of Wisconsin is at, or just past peak European corn borer flight and the most opportune treatment timing (if needed) may be starting in southern Wisconsin. Spot-check earliest planted corn because it is more attractive to female first generation European corn borer moths to lay eggs.
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What else is going on?? |
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Wisconsin Crop Manager
Insects and Mites
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By WCM Staff on
6/19/2008 12:18 PM
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There have been a few reports of armyworm damage on corn planted after a small grain cover crop or in dense weed growth. This is not out of the ordinary for this time of the year. But it does make you wonder what is happening in wheat. I’ve noticed some lodging of wheat from recent storms.
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Balancing Herbicide Drift vs Spray Timing |
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Wisconsin Crop Manager
Weeds
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By WCM Staff on
6/18/2008 2:46 PM
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Three recent events trigger this article. First, a call from a landowner with significant concerns after watching a herbicide application with winds alleged at 20 mph blowing towards their berry crop. Second, yesterday’s wind that was gusting well over 20 mph and preventing herbicide applications at a time when we need to spray our trials just like many custom applicators and growers who need to spray corn fields. Third, a call asking about the risk of dew affecting glyphosate performance if spraying in early mornings to avoid the wind.
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Planting Corn in June and July! – What can you expect? |
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Wisconsin Crop Manager
Crops
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By WCM Staff on
6/18/2008 12:37 PM
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Unprecedented rainfall continues to cause flooding and ponding leading to problems for corn establishment on 5 to 10% of planted acres in southern Wisconsin. Flooded and ponded areas have existed long enough now so that plants have been killed and areas need to be replanted. Most planted acres are still in good shape, but fertilizer and herbicide treatments need to be applied as soon as possible since the majority of the crop is at the V4-V5 stage and lay-by (V-10) will be occurring within the next two weeks.
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Flooding Impacts on Corn Growth and Yield |
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Wisconsin Crop Manager
Crops
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By WCM Staff on
6/13/2008 2:47 PM
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Recent rains have caused flooding and ponding in many cornfields. Growers are concerned about corn growth and development and any yield effects that might occur from short periods of flooding. The extent to which flooding injures corn is determined by several factors including: 1) timing of flooding during the life cycle of corn, 2) frequency and duration of flooding, and 3) air-soil temperatures during flooding
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Herbicides, Rain, and Replanting |
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Wisconsin Crop Manager
Weeds
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By WCM Staff on
6/12/2008 1:25 PM
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The heavy rains that many fields received will raise a few key questions regarding herbicide performance and replant considerations. A major question with preemergence corn and soybean herbicides is if the heavy rains leached the herbicide out of the upper soil profile.
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Print issue files for 2007
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Crop Manager Vegetable Update
Clicking on these links will access the Wisconsin Crop Manager PDF files for 2008.
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Clicking on these links will access the Wisconsin Vegetable Crop Update PDF files for 2007.
- Aug 28, 2008 >> Veg Update 2008-16
- July 31, 2008>> Veg Update 2008-11
- July 24, 2008>> Veg Update 2008-10
- July 17, 2008 >> Veg Update2008-9
- July 10, 2008 >> Veg Update2008-8
- July 3, 2008 >> Veg Update2008-7
- June 26, 2008 >> Veg Update2008-6
- June 19, 2008>> Veg Update2008-5
- June 12, 2008>> Veg Update2008-4
- June 5, 2008>> Veg Update2008-3
- May 28, 2008>> Veg Update2008-2
- May 22 2008 >> Veg Update2008-1
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- August 22 >> Veg Update2007-11
- August 9 >> Veg Update2007-10
- July 26 >> Veg Update2007-9
- July 19 >> Veg Update2007-8
- July 11 >> Veg Update2007-7
- July 5 >> Veg Update2007-6
- June 28 >> Veg Update2007-5
- June 21 >> Veg Update2007-4
- June 14 >> Veg Update2007-3
- June 6 >> Veg Update2007-2
- May 30 >> Veg Update2007-1
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