Diff: RRD Look-Alikes

== RRD Look-Alikes ==

== RRD Look-Alikes ==

This page is for false alarms and confusing symptoms. It should be read before telling someone to remove a rose for [[Rose Rosette Disease]].

This page is for false alarms and confusing symptoms. It should be read before telling someone to remove a rose for [[Rose Rosette Disease]].

=== Common false alarms ===

=== Common false alarms ===

* Normal red, bronze, or burgundy new growth that expands normally and hardens green.

* Normal red, bronze, or burgundy new growth that expands normally and hardens green.

* Vigorous basal breaks after pruning or spring growth.

* Vigorous basal breaks after pruning or spring growth.

* [[Herbicide Injury]], especially glyphosate or growth-regulator drift, which can cause narrow leaves, distorted clusters, and stunting.

* [[Herbicide Injury]], especially glyphosate or growth-regulator drift, which can cause narrow leaves, distorted clusters, and stunting.

* Aphids, chilli thrips, spider mites, and other pests deforming soft tips.

* Aphids, chilli thrips, spider mites, and other pests deforming soft tips.

* Heat, drought, root stress, transplant shock, fertiliser burn, spray burn, or winter injury.

* Heat, drought, root stress, transplant shock, fertiliser burn, spray burn, or winter injury.

* Rose phyllody or weather-caused flower oddities, where one flower looks strange but the plant is otherwise healthy.

* Rose phyllody or weather-caused flower oddities, where one flower looks strange but the plant is otherwise healthy.

=== What makes RRD more concerning ===

=== What makes RRD more concerning ===

* Symptoms are concentrated on one cane and get worse over time.

* Symptoms are concentrated on one cane and get worse over time.

* New growth is distorted, clustered, and unusually thorny compared with normal growth on that same rose.

* New growth is distorted, clustered, and unusually thorny compared with normal growth on that same rose.

* Buds abort or flowers are malformed along with cane distortion.

* Buds abort or flowers are malformed along with cane distortion.

* Nearby roses or multiflora roses show suspicious symptoms.

* Nearby roses or multiflora roses show suspicious symptoms.

* The pattern is not explained by a recent weedkiller event, heat wave, pest outbreak, or pruning response.

* The pattern is not explained by a recent weedkiller event, heat wave, pest outbreak, or pruning response.

=== Photo checklist ===

=== Photo checklist ===

* Whole plant and the affected cane from multiple angles.

* Whole plant and the affected cane from multiple angles.

* Close-ups of leaves, thorns, buds, and cane base.

* Close-ups of leaves, thorns, buds, and cane base.

* A healthy new shoot from the same rose for comparison.

* A healthy new shoot from the same rose for comparison.

* Nearby roses and any wild multiflora rose.

* Nearby roses and any wild multiflora rose.

* Timeline: when it appeared, whether it hardened normally, and whether it spread.

* Timeline: when it appeared, whether it hardened normally, and whether it spread.

=== Moderation language ===

=== Moderation language ===

Use possible, suspicious, or needs extension/lab review until evidence is strong. Avoid saying confirmed unless a lab, extension specialist, or clearly documented progression supports it.

Use possible, suspicious, or needs extension/lab review until evidence is strong. Avoid saying confirmed unless a lab, extension specialist, or clearly documented progression supports it.

=== Sources ===

=== Sources ===

* [RHS: Rose problems FAQ](https://www.rhs.org.uk/plants/roses/frequently-asked-questions)

* [RHS: Rose problems FAQ](https://www.rhs.org.uk/plants/roses/frequently-asked-questions)

* [University of Maryland Extension: Rose Rosette Disease](https://www.extension.umd.edu/resource/rose-rosette-disease)

* [University of Maryland Extension: Rose Rosette Disease](https://www.extension.umd.edu/resource/rose-rosette-disease)

* [Oklahoma State Extension: Rose Rosette Disease](https://extension.okstate.edu/fact-sheets/rose-rosette-disease.html)

* [Oklahoma State Extension: Rose Rosette Disease](https://extension.okstate.edu/fact-sheets/rose-rosette-disease.html)

* [UC IPM: Roses diseases and abiotic disorders](https://ipm.ucanr.edu/home-and-landscape/roses-diseases-and-abiotic-disorders/)

* [UC IPM: Roses diseases and abiotic disorders](https://ipm.ucanr.edu/home-and-landscape/roses-diseases-and-abiotic-disorders/)

[[Category:RRD]]

[[Category:RRD]]

[[Category:Diseases]]

[[Category:Diseases]]

[[Category:Identification]]

[[Category:Identification]]