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

Horticultural practices to minimize disease

Horticultural practices to minimize disease

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

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 Insect Weed 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 Water Insecticidal soap, dish soap Pyrethrin Bayer products

Insecticides- April & May Aphids and Midge 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 Add photo of midge fly --

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

May & June Thrips & J. Beetles

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.                                                              Add picture—See rose insect plate, Chapter IX

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 45o 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

Life cycle is 5-20 days depending on temperature 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 Floramite 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 Forbid 4F 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 Akari, Sanmite and Shuttle 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

Enjoy your roses

Thank you for your attention