Outdoor & Yard / Products / Rose spray (combination fungicide + insecticide)

Rose spray (combination fungicide + insecticide) — outdoor safety profile

Elevated risk

Combination garden spray for roses containing myclobutanil (triazole systemic fungicide), tau-fluvalinate (pyrethroid insecticide), and sometimes neem oil (azadirachtin).

What is this product?

Combination garden spray for roses containing myclobutanil (triazole systemic fungicide), tau-fluvalinate (pyrethroid insecticide), and sometimes neem oil (azadirachtin). Myclobutanil is a DMI (demethylation inhibitor) fungicide that blocks ergosterol synthesis in fungi. Tau-fluvalinate is a synthetic pyrethroid highly toxic to bees (LD50 0.2 ug/bee). Neem oil is a natural insecticide/miticide. Primary concerns are pollinator toxicity (tau-fluvalinate), dermal/inhalation exposure during spraying, and myclobutanil's endocrine-disrupting properties (inhibits CYP19 aromatase).

What's in it

Click any compound name for its full safety profile, regulatory consensus, and exposure data.

Fungicide

  • Myclobutanil — Triazole fungicide. CYP19 aromatase inhibitor — endocrine disruption concern. EPA classified toxicity Category III. California Prop 65 listed (reproductive harm).

Insecticide

  • Tau-fluvalinate — Synthetic pyrethroid. Highly toxic to bees (LD50 ~0.2 ug/bee). Used historically in beehives for Varroa mite control but resistance is widespread. Aquatic toxicity.

How to use it more safely

  • Spray in evening when pollinators are less active
  • Wear gloves, long sleeves, and eye protection
  • Do not spray open blooms directly
  • Follow label re-entry intervals

Red flags — when to walk away

  • Contains tau-fluvalinate + applied to flowering plants — Direct pollinator kill on treated blooms

Safer alternatives

  • Neem oil spray (standalone) — Lower pollinator toxicity than synthetic pyrethroids; effective fungicide/insecticide for many garden pests
  • Potassium bicarbonate fungicide + insecticidal soap — Separate products with lower toxicity; no systemic fungicide residue; bee-safe when dry

Frequently asked questions

What's in Rose spray (combination fungicide + insecticide)?

This product type can contain: Myclobutanil, Tau-fluvalinate, among others. Click any compound name above for the full safety profile.

How can I use Rose spray (combination fungicide + insecticide) more safely?

Spray in evening when pollinators are less active; Wear gloves, long sleeves, and eye protection; Do not spray open blooms directly

Are there safer alternatives to Rose spray (combination fungicide + insecticide)?

Yes — consider: Neem oil spray (standalone); Potassium bicarbonate fungicide + insecticidal soap. See the Safer alternatives section above for details.

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Reference data, not professional advice. Aggregates publicly available regulatory and scientific information. Why we built ALETHEIA →