Late winter/Spring Weed Control Program
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
Priority Explanation
Specticle ®2 FLO 6 fl. oz./A or Ronstar on Fertilizer 2-3 lb ai/A
Ronstar ® FLO 81-122 fl. oz./A (2-3 lb ai/A) or Ronstar 1 on Fertilizer 2-3 lb ai/A
Control through August
Apply 90 days after previous application
For Ronstar-resistant goosegrass sites Control through August
Specticle FLO 2 9 fl. oz./A
Sand >85% or Soil Organic Matter <0.1%
Ronstar FLO 81-122 fl. oz./A (2-3 lb ai/A) or Ronstar 1 on Fertilizer 2-3 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
Specticle FLO 2 3 fl. oz./A Apply 30-45 days after previous application
For Ronstar-resistant goosegrass sites Control through August
Specticle FLO 2 3 fl. oz./A Apply 30-45 days after previous application
Specticle FLO 2 3 fl. oz./A
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)
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July, 2024
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