There is no set time restriction between seeding and applying Chlorothalonil DF Fungicide, though you shouldavoid watering at least 24 hours after application.
Quali - Pro Chlorothalonil DF Fungicide is best used as a preventative before disease is present but only to non-residential turf grass.  We recommend using a product that is labeled for red thread such as Heritage DF 50, Honor Guard PPZ, Armada 50 WP, Fertilome Liquid Systemic Fungicide or Eag…
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Chlorothalonil DF Fungicide is not labeled to be applied to tomatoes.