How to get rid of thrips on roses

What thrips look like on roses

Streaks of brown discoloration on rose petals, especially light-coloured varieties; deformed buds that fail to open cleanly; silvery scarring on young foliage.

For the full set of thrips damage symptoms across host crops, see our Thrips identification page.

Why roses attracts thrips

Thrips lay eggs in soft rose petal tissue and feed on the pollen and developing tissue. Rose blooms that hosted thrips often open with brown streaks even after the thrips have left.

Severity for this combo: Moderate — monitor closely. When to act: Through the summer flowering period — thrips are drawn to pale, fragrant cultivars in particular.

Step-by-step control protocol

This is the integrated-pest-management protocol — non-chemical control first, biological and organic options second, conventional sprays only as a labelled last resort. Total cycle: about three weeks for most home cases.

1. Confirm the pest. Inspect the plant — look for silvery or bronze rasping marks on upper leaf surfaces. If unsure, photograph the affected area and open Growli for instant species ID.
2. Isolate where possible. Move container-grown roses away from healthy plants. For outdoor beds, mark the affected row so you can monitor it daily.
3. Apply non-chemical control first. Blue or yellow sticky traps at canopy height
4. Add biological or organic spray. Blue sticky traps in the rose bed; deadhead damaged blooms and bin them; spinosad at dusk when populations build. Encourage Orius and minute pirate bugs by avoiding broad-spectrum sprays.
5. Repeat on schedule. Most thrips protocols need repeating every 5-7 days for three weeks to catch each new hatch. Egg-to-adult in 2-3 weeks. Pupation happens in soil, which is why a multi-tactic approach (foliar spray plus soil drench plus sticky traps) outperforms any single intervention.
6. Monitor and prevent recurrence. Inspect roses weekly for the rest of the season. Remove weedy field edges and bridge crops that harbour thrips before transplanting

Best biological control for thrips on roses

For greenhouse, polytunnel, conservatory, and indoor production on roses, biological control gives long-term suppression without the residue or pollinator harm of synthetic sprays:

• Orius insidiosus (minute pirate bug) — single adult eats up to 40 western flower thrips per day; the gold standard for pepper banker-plant systems
• Amblyseius swirskii — predatory mite, effective on chilli thrips in peppers
• Neoseiulus cucumeris — predatory mite for cucumber and ornamental greenhouse use
• Steinernema feltiae nematodes — soil drench targets thrips pupae

Organic spray options

Spinosad gives strong thrips control while being relatively soft on Orius populations — apply at dusk to protect bees. Cyantraniliprole and spirotetramat are systemic options compatible with Orius but require label-dosing care. Pyrethrin is a knockdown option for severe outbreaks.

Prevention going forward

• Blue or yellow sticky traps at canopy height
• Remove weedy field edges and bridge crops that harbour thrips before transplanting
• Use thrips- and virus-free transplants — inspect every seedling
• Reflective mulch to disrupt incoming flights
• Maintain consistent watering; drought-stressed plants suffer more

Common mistakes when treating thrips on roses

• Spraying once and walking away. Egg-to-adult in 2-3 weeks. Pupation happens in soil, which is why a multi-tactic approach (foliar spray plus soil drench plus sticky traps) outperforms any single intervention. A single spray misses everything that hatches afterwards — plan a 3-week protocol.
• Confusing the species. Roses hosts several similar-looking pests. Confirm before treating; the wrong protocol wastes weeks. Open Growli for a confirmed ID.
• Spraying in midday heat. Insecticidal soap and horticultural oil burn leaves above 30 degC and on drought-stressed plants. Apply at dawn or dusk.
• Mixing biological control with broad-spectrum sprays. Pyrethroids and neonicotinoids wipe out predator releases. Use one strategy at a time.

Frequently asked questions

How do I get rid of thrips on roses?

Blue sticky traps in the rose bed; deadhead damaged blooms and bin them; spinosad at dusk when populations build. Encourage Orius and minute pirate bugs by avoiding broad-spectrum sprays. Egg-to-adult in 2-3 weeks. Pupation happens in soil, which is why a multi-tactic approach (foliar spray plus soil drench plus sticky traps) outperforms any single intervention.

What do thrips look like on roses?

Streaks of brown discoloration on rose petals, especially light-coloured varieties; deformed buds that fail to open cleanly; silvery scarring on young foliage.

When should I treat thrips on roses?

Through the summer flowering period — thrips are drawn to pale, fragrant cultivars in particular.

Why are thrips attracted to roses?

Thrips lay eggs in soft rose petal tissue and feed on the pollen and developing tissue. Rose blooms that hosted thrips often open with brown streaks even after the thrips have left.

What is the best biological control for thrips on roses?

Orius insidiosus (minute pirate bug) — single adult eats up to 40 western flower thrips per day; the gold standard for pepper banker-plant systems. Blue sticky traps in the rose bed; deadhead damaged blooms and bin them; spinosad at dusk when populations build. Encourage Orius and minute pirate bugs by avoiding broad-spectrum sprays.

Will thrips on roses spread to other plants?

Yes. Thrips from roses typically migrate to nearby susceptible hosts — see the affected-crops list on the main thrips page. Quarantine, sticky traps, and weekly inspections of neighbouring plants are essential.

Are pesticides safe to use on roses?

Insecticidal soap, horticultural oil, neem oil, and Bti are the safest options for edible and indoor roses. Always read the product label and follow manufacturer's PPE, dosage, and re-entry guidance. Pesticide approvals change — confirm via the UK HSE pesticide register or US EPA before use.

Sources

Combo-specific guidance sourced from US Cooperative Extension publications (UC IPM, NC State, UMD, UMN, Penn State, CSU, UF/IFAS EDIS), Clemson HGIC fact sheets, Royal Horticultural Society guidance, and Cornell NYS IPM Biocontrol fact sheets. Reviewed by the Growli editorial team in May 2026.

Keep going

• All crops affected by thrips
• All 8 garden pests covered in this guide
• Garden pest identification — complete article