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Controlling Insect Pests in the Garden

Controlling Insect Pests in the Garden

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Controlling Insect Pests in the Garden

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  1. Controlling Insect Pests in the Garden Dr. Monica Valentovic And Dr. Gary Rankin

  2. Control of Pests is a decision making process • Plant selection – Japanese beetles • Horticulture practices • Pesticide management

  3. Horticultural practices to minimize disease • Planting • Plant at maximum distances for air flow • 28- 30” HT • Prune • Prune centers to maintain air flow • Minimize disease • Prune diseased canes or buds

  4. Horticultural practices to minimize disease

  5. Horticultural practices to minimize disease

  6. Horticultural practices to minimize disease • Water • Essential for growth of roses • Water to minimize splashing of leaves • Overhead watering prior to spraying to cool off roses and remove spray residue • Mulch to minimize water loss • Watering but splashing rose leaves can induce black spot • Remove bottom leaves

  7. Check your garden for disease • Or get the Past President of the ARS to survey your garden

  8. PESTS?? • An undesirable substance in the garden • Fungus • blackspot • Insect • Spider mites • Weed • Individual

  9. Insecticides • Use only when needed • Seasonal problems • April Aphids and Midge • May & June Thrip & Japanese beetles • July & August Spider Mites • September Cucumber beetles • -October Scale

  10. Insecticides- April & MayAphids and Midge • Aphids • Water • Insecticidal soap, dish soap • Pyrethrin • Bayer products

  11. Insecticides- April & MayAphids and Midge • Aphids • Water • Insecticidal soap, dish soap • Pyrethrin • Bayer products • Midge • First step eliminate larvae prior to dispersal from soil • Talstar, Imidacloprid & cyfluthrin

  12. Midge • Control: Monitor plants in early spring to detect midge. Cut off damaged blooms, foliage. • Treat rosebeds with Triazicide or other soil insecticide. • Spray with insecticide –every two weeks

  13. We need to protect our blooms in the summer from..

  14. May & June Thrips & J. Beetles

  15. Thrips • Thrips cause damage such as browning on the inside petals of light colored roses. • Tiny, slender, brownish winged insects, barely visible to naked eye. • Look for them in the petals of light colored roses, especially in the spring. • Damage caused by rasping mouthparts. • Cause some blooms not to open.

  16. Thrips • Treatment: Mist flowers and top foliage with Orthene, Cygon 2E, Bayer Rose and Flower, Merit, Conserve, flower bonnets.

  17. Japanese Beetles • Treat lawn for grubs • Treat roses • Carbaryl (Sevin) 2times/week • Remove beetles and place in soapy water • Imidacloprid + cyfluthrin • Pyrethrin + Rotenone • Neem oil is deterrent, tastes bad

  18. Rose Cane Borer • Bores holes in larger canes • Prune below hole • Cut at 45o or greater • Seal cuts • Spray pyr/rotenone, cyfluthrin, cygon 2E

  19. July & August Spider Mites • Water underside every 3 days • Water rose beds • Avid • Imidacloprid/cyfluthrin • Pyrethrin/Rotenone • Floramite

  20. Miticides • Life cycle is 5-20 days depending on temperature • Higher temp more eggs are laid, higher infestation • No systemic miticides-Why? • Mites feed near plant veins and midrib not in xylem or phloem so never come in contact with systemic miticides

  21. Miticide selection • Avid/Lucid • Translaminar • Only Kills adults • Works on opening Cl channel in nerves • Floramite • Works by Contact, must spray underside of leaves • Kills all stages of life cycle • Closes Cl channels in nerves

  22. Miticide selection • Hexygon • Kills adults and Larvae • Contact spray, must spray underside of leaves to be effective • Inhibits embryo and larva formation • Forbid 4F • Translaminar and contact; lipid synthesis inhibitor causes water imbalance and dehydration in mites and whiteflies • Kills all stages • Residual action for 4-8 weeks

  23. Miticide selection • TetraSan • Translaminar • Kills eggs and larva, minimal effect on adults • Inhibits formation of exoskeleton • Prevent eggs and larva developing normally • Akari, Sanmite and Shuttle • Inhibit mitochondria • Akari contact and stomach • Akari, Sanmite and Shuttle work by contact

  24. Sept & Oct – Cucumber Beetles -Pyrethrin/rotenone -Neem oil -Ultrafine oil -Cyfluthrin -Water jet for eggs

  25. October - Rose Scale • Rose scale is an insect • Attaches to canes • May look scaly • Appears in Fall • Lime Sulfur, Dormant oil

  26. Enjoy your roses

  27. Thank you for your attention