Presentation on theme: "Controlling Insect Pests in the Garden Dr. Monica Valentovic And Dr. Gary Rankin."— Presentation transcript:
Controlling Insect Pests in the Garden Dr. Monica Valentovic And Dr. Gary Rankin
Control of Pests is a decision making process Plant selection – Japanese beetles Horticulture practices Pesticide management
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
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
Check your garden for disease Or get the Past President of the ARS to survey your garden
PESTS?? An undesirable substance in the garden Fungus – blackspot Insect – Spider mites Weed Individual
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
Insecticides- April & May Aphids and Midge – Aphids Water Insecticidal soap, dish soap Pyrethrin Bayer products
Insecticides- April & May Aphids and Midge – Aphids Water Insecticidal soap, dish soap Pyrethrin Bayer products – Midge First step eliminate larvae prior to dispersal from soil Talstar, Imidacloprid & cyfluthrin
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
We need to protect our blooms in the summer from..
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.
Thrips Treatment: Mist flowers and top foliage with Orthene, Cygon 2E, Bayer Rose and Flower, Merit, Conserve, flower bonnets.
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
Rose Cane Borer Bores holes in larger canes Prune below hole Cut at 45 o or greater Seal cuts Spray pyr/rotenone, cyfluthrin, cygon 2E
July & August Spider Mites Water underside every 3 days Water rose beds Avid Imidacloprid/cyfluthrin Pyrethrin/Rotenone Floramite
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
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
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
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
Sept & Oct – Cucumber Beetles - Pyrethrin/rotenone -Neem oil -Ultrafine oil -Cyfluthrin -Water jet for eggs
October - Rose Scale Rose scale is an insect Attaches to canes May look scaly Appears in Fall Lime Sulfur, Dormant oil