Crops Bulletin
 April 25, 2016   
  Issue 1  
    
 

Prepared by

Paul Kassel

Extension Field Agronomist

 

Phone: 

(712) 262-2264

Email: [email protected] 

 

 

Serving Clay, Buena Vista, Dickinson, Emmet, Hancock, Kossuth, Palo Alto, Pocahontas, Sac and Winnebago Counties

 

 

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, and marital or family status. (Not all prohibited bases apply to all programs.) Many materials can be made available in alternative formats for ADA clients. To file a complaint of discrimination, write USDA, Office of Civil Rights, Room 326-W, Whitten Building, 14th and Independence Avenue, SW, Washington, DC 20250-9410 or call 202-720-5964.

Soil temperatures.  Check out county by county soil temperatures here.

Planting date study. This planting date study was conducted in 2014 and 2015 at the ISU Northwest Farm near Sutherland.
Yield loss was 0.84 bushels per day of planting delay when averaged across 2014 and 2015. The yield loss due to delay in planting date occurred mostly in 2015. The 2014 and 2015 growing seasons were similar. However, mid-August rainfall in 2015 appeared to benefit the yield and grain dry-down of mid-April date more than the early May planting date in 2015.

                          95 day  hybrid            104 day hybrid
Plant date  yield, bu/a    %h20    yield, bu/a    %h20
4/15-22            192            16.9          202            17.6
5/9-18              181            17.6          189            18.8
 
95 day hybrid - P9526, 104 day hybrid - P0407.
 
Imbibitional chill injury. Injury can occur to corn seedlings when corn seeds imbibe water that is colder than 50 degrees within 24 hours of planting. Soil temps have remained in the lower 50s since most corn was planted this spring. Read more about imbibitional chill injury  here.
 
Handy Bt trait table.   Having trouble keeping track of rootworm, corn borer and herbicide traits in corn? Download this 'Handy Bt Trait Table' as a reference.
 
Changes in cutworm reporting. Cooperators and ISU staff - in previous years - have placed pheromone traps to check the arrival of black cutworm moths. Trap info was then used to determine the scouting date for larvae. This year the ISU IPM staff will place traps at ISU research farms to monitor black cutworm activity. This trapping system will also monitor corn borer and true armyworm. Results will be reported in Integrated Crop Management News.
 


   


Prepared by Paul Kassel, Extension Field Agronomist

Phone: (712) 262-2264, Email: [email protected]