Crabgrass germinates when soil temperatures average 55°F and is best controlled with the preemeregnce herbicides Ronstar ® or Specticle ® . (Envu)
Month February July Week 5 6 7 8 9 10 11 12 13 14 15 16 17 18 192021 222324252627282930 March April May June
Prioritized Options
Priority Explanation
Specticle ®2 FLO 6 fl. oz./A or Ronstar on Fertilizer 2 lb ai/A
Ronstar ® FLO 122 fl. oz./A (3 lb ai/A) or Ronstar 1 on Fertilizer 3 lb ai/A
Control through August
1A
Apply 90 days after previous application
For Ronstar- resistant
goosegrass sites Control through August
Specticle FLO 2 9 fl. oz./A
1B
Sand >85% or Soil Organic Matter <0.1%
Ronstar FLO 122 fl. oz./A (3 lb ai/A) or Ronstar 1 on Fertilizer 3 lb ai/A
Specticle FLO 2 3 fl. oz./A Apply 30-45 days after previous application
Specticle FLO 2 3 fl. oz./A Apply 90 days after previous application
Control through August
1A
For Ronstar- resistant
Specticle FLO 2 3 fl. oz./A Apply 30-45 days after previous application
Specticle FLO 2 3 fl. oz./A Apply 30-45 days after previous application
goosegrass sites Control through August
Specticle FLO 2 3 fl. oz./A
1B
¹Spread rate should be minimum of 250 lbs of fertilizer per acre for regular granule size and 200 lbs per acre for mini granule size. ²Do not apply if turf injury is present and assess turf quality before each application.
Goosegrass germinates usually a couple of weeks later than crabgrass. Ronstar ® is an industry standard for goosegrass control, plus it allows sprigging into an application because it is absorbed by the shoots and not roots. (Envu)
12
Made with FlippingBook - Online Brochure Maker