Crops Bulletin
 May 6, 2016   
  Issue 2  
    
 

Prepared by

Paul Kassel

Extension Field Agronomist

 

Phone: 

(712) 262-2264

Email: kassel@iastate.edu 

 

 

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.
AgriSync. A new app is available to farmers and agri-business through ISU Extension. The AgriSync app is available free of charge to farmers. This will allow you to request live support via remote video technology on your smart phone.   Watch a brief tutorial for more info. Download the AgriSync app to your smartphone through your app store - and then connect with ISU Extension via the app.
 
Planting date study. A date of planting study was conducted at the ISU Northwest research near Sutherland in 2010 and 2011.
 
This study shows about 7% reduction in yield when planting date was delayed from late April to late May - or about 0.6 bu/day. Grain moisture at harvest was similar for all planting dates. However, the 2010 and 2011 seasons were relatively long growing seasons where a delayed planting date had less impact.
 
Date of planting and hybrid relative maturity study, NWRF. 2010 and 2011.
 
Planting                       DKC 4837      DKC 5509
date                             RM 98             RM 105
        -------------------------bu/a--------------------------------
4/29                             188                  212
5/13                             176                  215
5/27                             172                  197
 
Cutworm predicted dates. Black cutworm larvae are expected to be large enough to damage corn on May 20 in central Iowa and May 22 in northern Iowa.
 
One exception - there was a peak black cutworm flight observed in Woodbury county by a past cooperator in late March. Info from that moth flight would indicate a potential cutting date of May 13 in northwest Iowa. Farmers in NW and WC Iowa are advised to start checking early-planted corn from May 10 to 13.
 
Growing degree Days (GDD). The accumulation of GDDs started out the season with above average readings. The GDD count has fallen behind schedule since late April - going from a positive 30 to a negative 20 at many locations.
 
The GDD accumulation can be tracked for many Iowa locations by using the mesonet. Select 'accumulated station departures of precip/GDD/SDD', select the nearest location, select the desired dates and then select 'make plot with options'.
 
 
 


   


Prepared by Paul Kassel, Extension Field Agronomist

Phone: (712) 262-2264, Email: kassel@iastate.edu