Transcript Controlling Insects in the Rose Garden for 2010 (Needs MS

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
– 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
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Water
Insecticidal soap, dish soap
Pyrethrin
Bayer products
Insecticides- April & May
Aphids and Midge
– Aphids
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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..
May & June Thrips & J. Beetles
Thrips
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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
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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
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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
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October - Rose Scale
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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