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Green Peach Aphid on Roses: Identification by Cornicles

Those rear "spikelets" on the green bug are cornicles—aphid hallmark structures secreting defensive fluids. This is likely green peach aphid. They damage plants by sucking sap; undigested sap becomes sticky honeydew, hosting black sooty mold. Easiest control: blast with water. Aphids are slow; predators will handle the rest.

About Gardening: Managing Aphids on Shrubs: Identification and Control Options; Aphids on Avocado Seedlings: Organic Removal and Prevention; Rose Cane Galls: Bacterial Tumors on Stems; Why Your Roses Aren't Blooming: Troubleshooting Tips for High-Altitude Gardens; Rose Shoots from Old Transplant Sites—Suckers or Original?; Effective Organic Control of Rose Slugs (Sawfly Larvae) on Rose Bushes; Aphids on Roses: Sticky Leaves and Simple Control; Aphids: Identification, Natural Control, and When to Spray; Aphids on Pansies: Early Spring Invaders; Aphids on Tomatoes: Wash Off or Spray Soap/Insecticide

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