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AgriPartner Scouting Update 6/9/14

Timely rains have been appreciated this spring in the Michiana area.  In many of the heavy soil or “wet spots” the plants are struggling –  not liking their “feet” wet, but overall this is a problem that can be dealt with in our mostly sandy soils!  It has been especially nice activating pre-emergence herbicides.  Many fields are as clean as they’ve ever been!

 

Side-dressing has begun in corn fields where corn is V5 or taller.  (Vegetative stages are numbered by the number of leaf collars formed.)  At this stage the corn’s root system has also caught up with the vegetative growth above ground and symptoms of stress are disappearing, resulting in a beautiful green hue as you look across your fields.  

 It is important to keep a watchful eye on weeds in fields.  Remember the timing to spray is determined by the size of the weed not the crop.  In most cases weeds should be sprayed before they reach six inches in height.  If weeds are taller than 6 inches another mode of action will greatly increase the likelihood of control.  Giant Ragweed like the one pictured below requires additional herbicide for control.  Do NOT spray Roundup or other glyphosate alone on weeds this size and expect them to die completely.  They will be burned back, but will survive – which only increases the chances of resistant weeds!

If feeding is found on soybean leaves the culprit is most likely Soybean Leaf Beetle.  The threshold for treatment before bloom is if defoliation reaches 30% and there are five or more beetles per foot of row.  Damage rarely reaches the threshold for treatment.

Thanks for getting your boots muddy with us!

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