SWEET POTATO


Weed Problem   Chemical   Pounds Active Ingredient (AI)/Acre   Amount of Commercial Product/Acre   Remarks and Limitations

Preemergence   clomazone
(COMMAND 3ME)
  0.5-1.2  
1.3-3.3 pt
  Apply to soil surface before transplanting. May be applied after transplanting at 1.5 pt/acre. Use low rate on coarse soils. 95-day PHI.

  napropamide
(DEVRINOL 50DF-XT)
  1-2  
2-4 lb
  Apply immediately after transplanting. If rain does not occur within 24 hours, incorporate it shallowly or irrigate with 0.5 inch of water.

  s-metolachlor
(DUAL MAGNUM 7.62EC)
  0.95-1.27  
1-1.33 pt
  Apply after transplanting before weeds emerge. Do not incorporate into soil. Close transplant trenches before application of Dual Magnum. 60-day PHI. See: www.farmassist.com for Michigan 24C indemnified label.

Postemergence grasses   clethodim
(SELECT MAX 0.97E)
  0.068-0.12  
9-16 fl oz
  Apply to actively growing grasses. Do not exceed 64 fl oz/acre/year. Include 0.25% NIS/acre. 30-day PHI.

  fluazifop-P
(FUSILADE DX 2E)
  0.16-0.19  
10-12 fl oz
  Apply to actively growing grasses. Include 1 qt COC/acre or 1 pt NIS/acre. 55-day PHI.

  sethoxydim
(POAST 1.5E)
  0.19-0.28  
1-1.5 pt
  Apply to actively growing grasses. Include 1 qt COC/acre. Maximum total of 5 pt/acre/year. 30-day PHI.

Perennials   glyphosate
(ROUNDUP 4L)
  2-3  
2-3 qt
  Apply to emerged perennials before planting in the spring or after harvest in the fall.