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Rose Leaf Roll Without Visible Pests: Weather or Chemical Stress?

A Reading, UK gardener had leaf roll on roses but no sawfly signs (no eggs, grubs, silk). Asked for other causes.

Tortrix Moth

Lays eggs on leaf underside, uses silk to roll leaf. If no silk, not this pest.

Physiological Causes

Sudden cold weather or disliked fertilizer can cause leaf rolling. If no pests, new normal leaves appear in ~10 days. Recent cold snaps caused similar symptoms in many gardens.

Roses: Managing Black Spot on Knockout Roses in Humid Climates; Mildew Damage on Potted Roses in South Florida; Managing Powdery Mildew on Potted Roses in Mallorca; Preventing Winter Dieback on Red Carpet Roses: Stop Late Fertilizing and Spring Pruning; Mini Roses Losing Leaves Indoors: Light, Water, and Spider Mites; Managing Black Spot on Roses in Wet Weather: Prevention and Treatment; Brown, Crumbling Leaf Tips on Climbing Rose: Late Frost Damage on New Foliage; Roses Losing All Leaves: Heat Stress Response; Transplant Shock in 'Chrysler Imperial' Rose: Yellowing and Leaf Drop in South Florida; Tomato Leaf Roll: A Temporary Disorder

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