Corn Rootworm Refuge Acreage Calculator

	20% refuge Sales and planting prohibited
This map shows approximate locations of Bt Corn Rootworm refuge requirements.
For more information about Bt Corn Rootworm refuge requirements, please use the Herculex® RW Product Use Guide (PDF 94 KB) or YieldGard® Rootworm Product Use Guide .

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 Corn Rootworm corn acres based on Step #3	acres

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

Refuge Design:

Block Option A	Block Option B


Split Planter (Strips)	Perimeter
Minimum of 6 rows; 12 rows preferred	Minimum of 4 rows
Adjacent Option A	Adjacent Option B
	Separated by road, path, ditch, etc.; but not by another field of corn.

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

YGRW

® YieldGard and the YieldGard Rootworm 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

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