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Tobacco Budworm on Roses: The "Water Moccasin" Caterpillar

A caller described a rose caterpillar with triangular markings resembling a water moccasin—likely the tobacco budworm (Helicoverpa virescens). It bores into buds and is a sporadic but distinctive pest.

See also: "Roses: Insect and Mite Pests and Beneficials."

About Gardening: 'Mr. Lincoln' Rose History: European Lookalike in 1940s Scotland; Finding the 'Nicole' Wedding Rose: A Florist Variety Challenge; Growing 'Abracadabra' Rose: Stripe Stability, Climate Preferences & Sport Behavior; Propagating 'Candy Apple' Rose (1974): Cuttings Only—It's Off the Market; Growing 'Sterling Silver' Rose in Zone 9: Specialized Care for First Two Years; Transplanted Rose With 7-Inch Roots: Rescue After Multiple Mistakes; Why Identifying a Red Hybrid Tea Rose by Photo Alone Is Usually Impossible; Planting Pink Double Knockout Rose Tree in Staten Island (Zone 7): Fall or Spring?; The Story Behind the 'Mister Lincoln' Rose Name; Tobacco Budworm on Roses: Hidden Caterpillars Require Systemic + Spray

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