Agriculture: Bermudagrass Seed Production Pest Management Guidelines

Herbicide Treatment Table

Common name Amount per acre REI‡ PHI‡
(Example trade name) (hours) (days)
Not all registered pesticides are listed. The following are listed alphabetically. When choosing an herbicide, consider information relating to environmental impact, resistance management, the pesticide's properties, and application timing. Tank mixes may be necessary to achieve desired control; see Susceptibility of Winter Weeds to Herbicide Control and Susceptibility of Summer Weeds to Herbicide Control for information on specific weed control. Always read label of product being used.
A. 2,4-D AMINE* 0.5–0.95 lb a.i.    
  (Amine 4)   48 0
  WSSA MODE-OF-ACTION GROUP NUMBER1: 4
  COMMENTS: Apply to small broadleaf weeds before bermudagrass seed heads start to form. Follow label instructions and local regulations to avoid damage to adjacent crops.
B. BROMOXYNIL 0.25–0.5 lb a.i.    
  (Buctril)   24 0
  WSSA MODE-OF-ACTION GROUP NUMBER1: 6
  COMMENTS: Effective for control of winter annual broadleaf weeds if applied when weeds are very small (2- to 4-leaf stage of growth).
C. CARFENTRAZONE-ETHYL 0.008–0.03 lb a.i.    
  (Shark EW)   12 0
  WSSA MODE-OF-ACTION GROUP NUMBER1: 14  
  COMMENTS: Effective for control of some winter annual broadleaf weeds if applied when weeds are small (up to 4 inches tall). Control is enhanced with the addition of a nonionic surfactant or crop oil concentrate.
D. DICAMBA* 0.25–0.5 lb a.i.    
  (Banvel)   24 0
  WSSA MODE-OF-ACTION GROUP NUMBER1: 4
  COMMENTS: Apply to small broadleaf weeds before bermudagrass seed heads start to form. Follow label instructions and local regulations to avoid damage to adjacent crops.
E. DIQUAT
  (Reward) Label rates 24 0
  WSSA MODE-OF-ACTION GROUP NUMBER1: 22
F. PARAQUAT*
  (Gramoxone Inteon) Label rates 24 0
  WSSA MODE-OF-ACTION GROUP NUMBER1: 22
G. SULFOSULFURON
  (Certainty) Label rates 12 0
  WSSA MODE-OF-ACTION GROUP NUMBER1: 2
  COMMENTS: For postemergent control of certain broadleaf weeds, tall fescue, annual bluegrass, sedges, and green kyllinga. Two applications are often needed; takes about 2 weeks to get good control.
H. TRIFLOXYSULFURON
  (Monument) Label rates 12 0
  WSSA MODE-OF-ACTION GROUP NUMBER1: 2
  COMMENTS: For postemergent control of certain broadleaf weeds, tall fescue, annual bluegrass, sedges, and green kyllinga. Two applications are often needed; takes about 2 weeks to get good control.
I. TRIFLURALIN
  (Gowan Trifluralin 10G) 20 lb 12 0
  WSSA MODE-OF-ACTION GROUP NUMBER1: 3
  COMMENTS: Use allowed under a Special Local Needs permit. Can be applied after the fields are burned to kill off old growth for control of several annual weeds, but field trials have not demonstrated worthwhile results.
Restricted entry interval (REI) is the number of hours from treatment until the treated area can be safely entered without protective clothing. Preharvest interval (PHI) is the number of days from treatment to harvest. In some cases the REI exceeds the PHI. The longer of the two intervals is the minimum time that must elapse before harvest.
* Permit required from county agricultural commissioner for purchase or use.
1 Group numbers are assigned by the Weed Science Society of America (WSSA) according to different modes of action. Although weeds may exhibit multiple resistance across many groups, mode of action numbers are useful in planning mixtures or rotations of herbicides with different modes of action.
Text Updated: 06/09