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Bt Corn Borer Refuge Acreage Calculator

	20% refuge 50% refuge Sales and planting prohibited
This map shows approximate locations of Bt Corn Borer refuge requirements.
For more information about Bt Corn Borer refuge requirements, please use the Herculex I Product Use Guide (PDF 190 KB) or the YieldGard® Corn Borer Product Use Guide (PDF 81 KB).

Last Modified:February 4, 2008

Calculate the number of refuge acres for your farm:
1.	Select your state:
2.	Select county:
3.	What are your planned total corn acres?	acres
4.
	Maximum Bt Corn Borer corn acres based on Step #3	acres

5.	What are your planned total Bt Corn Borer corn acres?
6.
	Refuge acres requirement based on Step #5:

Refuge Design:

	Separate fields of non-Bt corn planted within 1/2 mile of each Bt corn field (1/4 mile or closer preferred).
	Planting pivot corners to non-Bt corn.
	Splitting planter to alternate a minimum of 4 rows or more (6 rows preferred) of non-Bt corn with Bt corn.
	Large non-Bt corn strips or blocks within the Bt field.
	Planting field perimeters or end rows to non-Bt corn.

Herculex® Insect Protection technology by Dow AgroSciences and Pioneer Hi-Bred. ® Herculex and the HX logo are registered trademarks of Dow AgroSciences LLC.

YGCB

® YieldGard and the YieldGard Corn Borer design are registered trademarks used under license from Monsanto Company.

YGPL

® YieldGard and the YieldGard Plus design are registered trademarks used under license from Monsanto Company.

^ Grain harvested from products that bear this mark is fully approved for food and feed use in the United States and Japan, but is not approved in the European Union. You must find a market for this crop that will not ship this grain or its processed products to Europe. Appropriate markets for this grain include: domestic feed use or grain handlers that specifically agree to accept this grain and handle it appropriately. For more information on your grain market options, go to the American Seed Trade Association's website at www.amseed.org or call your seed supplier.

MARKET CHOICES is a certification mark used under license from ASTA.

Know Before You Grow(SM), an information service provided by National Corn Growers Association at www.ncga.com.

NOTE: Information on this site designated with a

symbol is available in Adobe® Acrobat® Portable Document Format (PDF) files and must be viewed with Adobe Acrobat Reader. If you do not have Acrobat on your computer, you can download it now (free!) from the Adobe Web site.