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

Preemergence   pendimethalin
(PROWL H20 3.8 ACS)
2-4 pt
  Apply to chives after seeding or at the 2-3 leaf stage to control germinating annual grasses and weeds. Emerged weeds will not be controlled. Maximum 4 pt/acre/year. 30-day PHI. Use high rate pre on high-organic soil.

  0.64 - 1.27  
0.67 - 1.33 pt
  Broadcast at 2-3 leaf stage. Maximum of 1 application and 1.33 pt/crop/season. 21 day PHI. See: for Michigan 24C indemnified label.

Postemergence grasses   clethodim
9-16 fl oz
  Apply to actively growing grasses. Include an adjuvant. Controls annual bluegrass at the high rate. 14-day PHI.