ISSUE #405

405 - Finish the 2001 Season Off Right


Innumerable decisions go into producing that high yielding high quality crop each shareholder strives for. Decisions on crop rotations, variety selection, seedbed preparation and weed and insect control have been completed. It's now time to bring the crop to its full potential in the next 6 weeks. Cercospora control is the key to profitability.

Cercospora Leafspot Management

Weather conditions in July and August were as ideal for Cercospora as 1995 and 1998 when yield losses were very very high in many fields. Losses can easily reach 10 to 30% in recoverable sugar when Cercospora is severe.

Recommendations for August/September

  • Maintain proper application intervals
  • Don't cut rates below label recommendations
  • Scout fields carefully for disease incidence and severity
  • Always rotate fungicides
  • Check for daily infection value information

    • go to "Agronomy" then
    • go to "Pest Alert" then
    • go to "Weather Stations"

Supertin Receives 7 Day PHI

Supertin received a 7-day preharvest interval for Minnesota on August 9. The same 24c-state label was approved on August 15 for North Dakota. Check the shareholder information pages on and DTN for more information and the announcement for North Dakota.

This 7 day PHI should allow shareholders to effectively time September fungicide applications around prepile schedules. This label change applies only to water-soluble packs, not liquid Supertin.

2001 Quality Sample Rate Changes

The 2000 quality sample rates for different size fields have been slightly modified. The goal is to have 25 to 30 samples per field to give a good confidence level of having the determined field sugar content within a 0.25% standard deviation range. During prepile fields from 0-20 acres will be sampled at a 100% rate. All prepile fields over 20 acres will be sampled at a 50% rate.

Table 1. The 2001 Truck Sampling Rate

Field Size (Acres)Sample Rate (%)
0-20 100
20.1 - 50.0 50
50.1 - 100 40
100.1 + 30

A main change from last year is that "small" fields sampled at 100% are defined as less than 20.1 acres whereas last year they were less than 40.1 acres. Another change is that "large" fields defined as over 100 acres are sampled at 30%. Last year large fields were 140+ acres sampled at 20%. Also more samples will be taken at prepile to help growers better manage their prepile harvest. Overall the total number of samples is similar to previous years, so the cost of sampling will not significantly change

Lygus Bug

Check fields for Lygus Bugs and other insects for damage in your fields.

N Credits From Beet Tops

Feedback from shareholders indicates that using nitrogen credits for the crop following beets in rotation has been successful. Using satellite imagery beet canopy biomass and color can be determined. The greater biomass and greener canopy color at sugarbeet harvest indicates more available N for the crop after beets. Using N credits and variable rate fertilization shareholders saved well over $500,000 in fertilizer costs in 2001.

Agriculturists have sampled wheat fields in each of their districts to get additional information on wheat yield and quality in 2001. This information will allow your agriculturist to provide you with better information and advice as you manage wheat after beets in 2002 based on 2001 beet field satellite imagery. Careful nitrogen management in the entire rotation will improve quality of future beet crops.


Fertilizer recommendations for sugarbeets have been changed for 2001. See the last Ag Notes. More details on fertilizer management in the next issue.

Harvest Calculator

A "Harvest Calculator" has been developed by the ag department. It's designed to assist shareholders to determine the best order to follow for choosing fields to harvest to improve on-farm profits. Well over 150 shareholders have checked it out.

Agronomic Factors Used With the Harvest Calculator

  • Variety
  • Planting Date
  • Cercospora Severity
  • Headlands Management
  • Soil type & Available Nitrogen Amount
  • Plant Population
  • Root Rot Severity
  • Hail
  • Harvest Methods

Shareholders use their specific field information to rank fields for a suggested order of harvest. To access the calculator go to, click on agronomy, then click on Ag Calculator, then click on Harvest Calculator.

American Crystal Sugar Company is giving away sugarbeet pulp and tailings (beet tops & chips)

Free Livestock Feed

Interested parties must contact one or more of the factories listed below for proper authorization and scheduling. Preference will be given to those parties interested in picking up feed on an on-going basis. For more information go to the "What's New" section of or call:

Crookston Factory 
(218) 281-0121

Drayton Factory 
(701) 454-3230

East Grand Forks Factory 
(218) 773-5124

Hillsboro Factory 
(701) 436-3167

Moorhead Factory 
(218) 291-540