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When
using any of the chemicals listed below, always be sure to read and
follow all of the manufacturer’s directions before application.
SPIDER MITES
Tiny microscopic spider-like pests that suck juices from the plant.
Cause a stippling effect or webbing on the undersides and/or tops of
leaves.
Some remedies
include:
- Neem Oil (Rose
Defense)
- Bonide All Seasons
Spray Oil (Apply only in cooler weather. Some varieties may experience
some temporary leaf drop)
- Orthonex
- Bayer 2-in-1
Systemic Rose & Flower Care
- Bayer Systemic
All-in-One Rose & Flower Care
- Hose off with water
APHIDS
Tiny green, red or black insects that suck plant juices. Generally they
are seen on the tips of the tender new growth or on flower buds. They
can distort the new leaves and spread viruses.
Some remedies
include:
- Neem Oil (Rose
Defense)
- Bonide All Seasons
Spray Oil (Apply only in cooler weather. Some varieties may experience
some temporary leaf drop)
- Safer Insecticidal
Soap
- Malathion
- Bayer 2-in-1
Systemic Rose & Flower Care
- Bayer Systemic
All-in-One Rose & Flower Care
- Hose off with a
strong jet of water
- Ladybugs and other
predatory insects
ROSE SLUG
The larval form of the adult Sawfly. The upper or lower surfaces of the
leaves are eaten between the veins leaving a lacy, translucent layer of
tissue that turns brown.
Some remedies
include:
- Monterey Garden
Insect Spray (Spinosad bacteriae) used to control the larva.
- Sevin to control
hatching pupae.
POWDERY MILDEW
A
white powdery fungus that can distort leaves and flowers. Usually occurs
in spring or during periods of low clouds or humid weather.
Some remedies
include:
- Planting roses in
full sun
- Hose off with water
in the mornings
- Immunox Fungicide
- Neem Oil (Rose
Defense)
- Bonide All Seasons
Spray Oil (Apply only in cooler weather. Some varieties may experience
some temporary leaf drop)
- Lilly Miller
Polysul - Lime-sulphur fungicide
- Funginex
- Bayer Systemic
All-in-One Rose & Flower Care
RUST
A
fungus that causes rust-colored spots underneath leaves.
Some remedies
include:
- Avoid over-head
watering
- Stripping infected
foliage from canes
- Immunox Fungicide
- Neem Oil (Rose
Defense)
- Lilly Miller
Polysul - Lime-sulphur Fungicide
- Funginex
- Bayer Systemic
All-in-One Rose & Flower Care
- Watering early in
the morning
BLACK SPOT
Most common in areas with moist and humid summers. Small black spots
appear on leaves which then yellow and drop.
- Some remedies
include:
- Neem oil (Rose
Defense)
- Stripping canes of
infected foliage
- Immunox Fungicide
- Lilly Miller
Polysul - Lime-sulphur fungicide
- Funginex
- Bayer Systemic
All-in-One Rose & Flower Care
DOWNY MILDEW
Before the incredible rains of early 2005, most of us had never
experienced Downy Mildew. This was a disease that was more prevalent on
the coast or
areas that have substantial rainfall. Downy Mildew is an air-born
fungus. Leaf symptoms include purple-brown spots that resembles Black
Spot. The leaves may then turn yellow and drop off rapidly. The
fungus is most active when humid weather
conditions persist (over 85% humidity and 55-65 degrees).
- Reduced incidence
is achieved by lowered humidity, a rise in temperature and a
preventative application of fungicide. Since temperature and humidity
can not be controlled, a regular application of the fungicide, Aliette,
is recommended
- Neem Oil (Rose
Defense)
- Keep rose beds
clean of leaves, debris and clippings
- Air circulation is
important when choosing a site for your rose garden
- Avoid overhead
watering
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