GRAIN SORGHUM WEED CONTROL UPDATE 2015 Eric P

GRAIN SORGHUM WEED CONTROL UPDATE – 2015 Eric P. Prostko, Ph. D. Extension Weed Specialist Berrien Co, October 2014

GRAIN SORGHUM WEED CONTROL 1)Start clean! 2)Concep treated seed 3)Dual Magnum or Warrant (PRE) 4)Atrazine (POST) 5)Paraquat (Hooded sprayer) 6)Mechanical Cultivation

Weed Control in Grain Sorghum - 2013 NTC SG-02 -13 June 3 41 DAP Dual II Magnum 7. 64 EC @ 1 pt/A (PRE) Aatrex 4 L @ 48 oz/A (POST) COC @ 1% v/v (POST)

A New Product to Consider? • • Huskie 2. 06 EC Bayer Crop. Science Buctril (1. 75 lbs/gal) + pyrasulfotole (0. 31 lbs/gal) MOA = 6 + 27 Postemergence (13 -16 oz/A) 3 -leaf to 12” tall sorghum Broadleaf weeds, good on pigweed Tank-mix with atrazine (16 oz/A)

Huskie Weed Control/Injury – 2014 NTC SG-02 -14 May 19 7 DAT Huskie @16 oz/A Aatrex @ 16 oz/A AMS @ 1 lb/A NIS @ 0. 25% v/v Huskie @16 oz/A AMS @ 1 lb/A NIS @ 0. 25% v/v

Huskie Injury on Sorghum

Huskie Rotation Restrictions (cotton and peanut are not listed)

Inzen™ Z Grain Sorghum n n Kansas State Univ. Du. Pont/Advanta US Resistance to POST applications of ALS herbicides Non-GMO q n Dual/Cinch/Warrant PRE a must in my opinion q n n ALS-resistant shattercane Concep treated seed Stewardship!!! Zest (liquid Accent)

Weed Control in Inzen Sorghum - 2014 NTC SG-01 -14 June 19 31 DAP Dual II Magnum 7. 62 EC @ 16 oz/A – PRE Zest 0. 33 SC @ 12 oz/A – POST + Atrazine 90 DF @ 13. 3 oz/A – POST + COC @ 1% v/v - POST

Don’t Plant Sorghum in Fields Treated with Reflex in the same year!!!!

Current UGA Canola Weed Control Research Howard F. Schwartz, Colorado State University, Bugwood. org

NTC vs. Dual Magnum @ 3. 5 oz/A + Command @ 3. 5 oz/A – PRE CAN-01 -14 11/21/14 35 DAT

Canola Response to PRE Applied Reflex - 35 DAT 8 oz/A 4 oz/A Average field half-life for Reflex is 100 days CAN-02 -14 11/21/14 2 oz/A

Must be timely with Beyond in canola! 1 week too late NTC CAN-01 -14 12/05/14 Beyond 1 AS @ 4 oz/A Adept @ 0. 25% v/v AMS XTRA @ 2. 5% v/v 2 WAT

Questions or Comments? eprostko@uga. edu www. gaweed. com