Using Imazapyr for Pine Seedling Chemical Site Prep

Working closely with the University of Florida School of Forest Resources and Conservation and The University of Georgia Warnell School of Forestry and Natural Resources IFCO has been able to provide you with information concerning the use of Imazapyr for chemcial site preparation in the southern pine establishments.  We hope you will find this information informative and as always if you have questions please call us at 800-633-4506 or email us.

Imazapyr Site Prep

Timeline for Herbicide Site Prep Treatment

Table 1    2 lb. acid equivalent:

Planting Date Herbicide Site Prep Treatment Date**
May-June July-August September October
Herbicide product rates per acre*
Loblolly Pine
October 48 oz. 40 oz. NO NO
November 52 oz. 44 oz. 40 oz. 36 oz. (NO)***
Dec-Jan 56 oz. 48 oz. 44 oz. 40 oz.
Feb-Mar 64 oz. 56 oz. 52 oz. 48 oz.
Longleaf and Slash Pine
October 44 oz. 36 oz. NO NO
November 48 oz. 40 oz. 36 oz. (32 oz.) NO***
Dec-Jan 52 oz. 44 oz. 40 oz. 36 oz.
Feb-Mar 60 oz. 52 oz. 48 oz. 44 oz.
*Imazapyr product formulations containing 2 lb. acid equivalent imazapyr per gallon such as: trade names (manufacturer):  Chopper, Chopper Gen2 (BASF Specialty Products), Polaris SP (NuFarm), and Rotary 2SL (Alligare LLC).
**Do not plant within 60 days of a 48 oz/acre or greater (2 lbs. ae/gallon) imazapyr herbicide application.
***Do not plant within 45 days of a 32 or 36 oz/ac imazapyr rate when rainfall amounts for the area are lower than normal, soil moisture is not adequate for planting, and competing vegetation is less than 1 foot tall.

Table 2   4 lb. acid equivalent:

Planting Date Herbicide Site Prep Treatment Date**
May-June July-August September October
Herbicide product rates per acre*
Loblolly Pine
October 24 oz. 20 oz. NO NO
November 26 oz. 22 oz. 20 oz. 18 oz. (NO)**
Dec-Jan 28 oz. 24 oz. 22 oz. 20 oz.
Feb-Mar 32 oz. 28 oz. 26 oz. 24 oz.
Longleaf and Slash Pine
October 22 oz. 18 oz. NO NO
November 24 oz. 20 oz. 18 oz. (16 oz.) NO**
Dec-Jan 26 oz. 22 oz. 20 oz. 18 oz.
Feb-Mar 30 oz. 26 oz. 24 oz. 22 oz.
*Imazapyr product formulations containing 4 lb. acid equivalent imazapyr per gallon: trade names (manufacturer): Arsenal AC (BASF Specialty Products), Polaris AC Complete (NuFarm), and Imazapyr 4SL (Alligare LLC).
**Do not plant within 60 days of a 24 oz/acre or greater (4 lbs. ae/gallon) imazapyr herbicide application.
***Do not plant within 45 days of a 16 or 18 oz/ac imazapyr rate when rainfall amounts for the area are lower than normal, soil moistrue is not adequate for planting, and competing vegetation is less than 1 foot tall.

 

This entry was posted in Container Seedlings, Photo Gallery. Bookmark the permalink.