WEED CONTROL IN CENTIPEDEGRASS Dr. Tim R. Murphy Extension Weed Specialist University of Georgia Griffin.

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Presentation transcript:

WEED CONTROL IN CENTIPEDEGRASS Dr. Tim R. Murphy Extension Weed Specialist University of Georgia Griffin

SETHOXYDIM - VANTAGE - CENTIPEDEGRASS CONTROLS ANNUAL GRASSES SUPPRESSES BAHIAGRASS NO ANNUAL BLUEGRASS CONTROL NO SEDGE (NUTGRASS) CONTROL

VANTAGE - CENTIPEDEGRASS NO COC NEEDED ESTABLISHED SEEDLING - 3 IN. STOLON GROWTH DELAY MOWING 7 DAYS BEFORE AND AFTER APPLICATION

VANTAGE BAHIAGRASS SUPPRESSION 2.25 pts./acre DELAY MOWING - 7 DAYS BEFORE AND AFTER REPEAT APPLICATION - 10 TO 14 DAYS ACTIVELY-GROWING

TURFGRASS TOLERANCE TO HERBICIDES HERBICIDECENTIPEDEGRASSBERMUDAGRASS ATRAZINETD BENTAZONTT BENTAZON + ATRAZINETS-I MSMA/DSMAST SETHOXYDIMTS

TURFGRASS TOLERANCE TO HERBICIDES HERBICIDECENTIPEDEGRASSBERMUDAGRASS IMAZAQUINTT HALOSULFURONTT TRICLOPYR + CLOPYRALIDTI METRIBUZINNRT SETHOXYDIMTS

TOLERANCE TO CENTIPEDEGRASS TO ATRAZINE ATRAZINE qts./acreQUALITY 1 JAN + APR 6.8 APR + MAY 6.7 JAN + APR + MAY 6.7 APR + MAY + JULY 6.7 APR + JULY 6.6 MAY + JULY 7.0 MAY + JULY + AUG 7.0 JULY + AUG 6.9 NO HERBICIDE SEPTEMBER

TURFGRASS TOLERANCE TO HERBICIDES HERBICIDECENTIPEDEGRASSBERMUDAGRASS 2,4-DI-TT MCPPTT DICAMBAI-TT 2,4-D+MCPP +DICAMBAS-II-T MCPP+2,4-D +DICAMBAI-TT

Common Lespedeza Control with Atrazine % Control Atrazine 2.0 qts./acre

TOLERANCE OF NEWLY-SPRIGGED CENTIPEDEGRASS TO ATRAZINE AND SIMAZINE

TOLERANCE OF CENTIPEDEGRASS TO POSTEMERGENCE HERBICIDES

Tolerance of Dormant Centipedegrass

Tolerance of Centipedegrass at 50% Greenup

Tolerance of Centipedegrass at 100% Greenup

TOLERANCE OF DORMANT CENTIPEDEGRASS TO POSTEMERGENCE HERBICIDES -1987

TOLERANCE OF CENTIPEDEGRASS AT 50% GREENUP TO POSTEMERGENCE HERBICIDES

TOLERANCE OF CENTIPEDEGRASS AT 100% GREENUP TO POSTEMERGENCE HERBICIDES

TOLERANCE OF CENTIPEDEGRASS TO 2,4-D AND 2,4-D + 2,4-DP 2,4-D at 1.5 pts./acre 2,4-D at 0.75, 2,4-DP at 0.75 lb/A June + July July + Aug. % Injury

TOLERANCE OF CENTIPEDEGRASS TO 2,4-D AND TRIMEC CLASSIC 2,4-D at 1.5 pts./acre Trimec Classic at 3.25 pts./acre June + July July + Aug. % Injury