LEEK


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

Preemergence   dimethenamid-P
(OUTLOOK 6E)
  0.98  
21 fl oz
  Apply after the 2 leaf stage of seeded leek, or after transplants are established. Suppresses grasses, nutsedge. 30 Day PHI.

  pendimethalin
(PROWL H20 3.8 ACS)
  0.95-1.9  
2-4 pt
  Apply to leek preemergence or at the 2-3 leaf stage to control germinating annual grasses and weeds. Emerged weeds will not be controlled. Maximum 4 pt/acre/yr. 30-day PHI. Use high rate pre on high-organic soils. MI 24c label.

  s-metolachlor
(DUAL MAGNUM 7.62EC)
  0.63-1.26  
0.67-1.33 pt
  Apply at the leek 2-leaf stage. Use low rates on light soil. do not use on soils with <1% OM. 21-day PHI. See: www.farmassist.com for Michigan 24C indemnified label.

Postemergence grasses   clethodim
(CLETHODIM 2E)
  0.094-0.125  
6-8 fl oz
  Apply to small grasses. Use high rate for annual bluegrass control. Add an adjuvant. 14-day PHI.

  sethoxydim
(POAST 1.5E)
  0.19-0.28  
1-1.5 pt
  Apply to actively growing grasses. Include 1 pt COC/acre. Maximum 4.5 pt total/acre. 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.