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Roses

Roses. Classification of roses. Modern garden roses Old garden roses Species roses. Types of modern roses. Hybrid teas Grandifloras Floribundas Shrub Climbing Rambling Patio Miniatures. Grandiflora (large-flowered bush). Floribunda (cluster-flowered bush). Shrub roses.

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Roses

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  1. Roses

  2. Classification of roses • Modern garden roses • Old garden roses • Species roses

  3. Types of modern roses • Hybrid teas • Grandifloras • Floribundas • Shrub • Climbing • Rambling • Patio • Miniatures

  4. Grandiflora (large-flowered bush)

  5. Floribunda (cluster-flowered bush)

  6. Shrub roses • David Austin (English) • Dr. Griffith Buck • Knockout • Belinda’s Dream

  7. Old (European) garden roses • Alba • Bourbon • Centifolia • China • Damask • Gallicas • Hybrid musk • Moss • Noisette • Portland • Tea

  8. Alba roses

  9. Centifolia roses

  10. Damask roses

  11. Species Roses • Wild • Wild hybrids • Rugosas

  12. Buying roses • Bareroot • Potted

  13. Planting roses

  14. Planting roses

  15. Rose maintenance • Fertilization • Once per month during growing season

  16. Rose maintenance • Sanitation • To limit disease • Remove leaf litter, pruning waste • Do not compost! • Sanitize pruners • 10% clorox, 3-5 minutes (but corrosive over time) • Rubbing alcohol

  17. Pruning

  18. Pruning • Deadheading

  19. Yearly pruning • Prune when dormant (between leaf fall and spring bud break; not in winter) • Remove dead/dying canes • Remove pencil-thin canes • Tear off suckers on grafted roses

  20. Rose insect pests • Japanese beetles • Spider mites • Thrips • Aphids

  21. Rose pests- japanese beetles

  22. Japanese beetle control

  23. Japanese beetle grub control

  24. Rose pests - aphids

  25. Rose pests - thrips

  26. Rose diseases • Black spot • Powdery mildew • Botrytis blight (gray mold)

  27. Blackspot- a fungal disease

  28. Viral disorders • Rose yellow mosaic (RYMV) • Rose (common) mosaic (RMV)

  29. Disease management • Good sanitation (planting bed, tools) • Fungicides • Daconil, thiomyl (systemic), baking soda

  30. Rose Class Resistant Intermediate Susceptible Floribundas 7% 36% 57% Grandifloras 0% 75% 25% Hybrid teas 10% 35% 55% Shrub roses 63% 26% 11% Rugosa hybrids 100% 0% 0% Species/hybrids 96% 0% 4% Basye roses 100% 0% 0% Plant disease resistant cultivars 120 rose cultivars, breeding lines, and species were planted in field trials at two sites (College Station and Overton with Dr. Brent Pemberton) in Texas in 1993 and 1994 to evaluate their resistance to the blackspot fungus. The plants were set on 3 foot centers with 4 replications in a randomized block design. Rating were done 3 to 4 times per year for percent of the leaflets with blackspot and leaf defoliation

  31. “Easy going”

  32. Pest control

  33. Biological pest control • Wheel bugs

  34. Biological control link

  35. Propagating roses • Seed propagation • Requires 3-4 weeks stratification • Hardwood cuttings • Semi-ripe cuttings • Bud grafting • Layering

  36. Hardwood cuttings • 3 months old

  37. Rose Information • American Rose Society

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