Rose Diseases

Rose Diseases Pests
Rose diseases and rose leaf diseases can be a problem for rosegardeners.
The reality of growing roses are that they are vulnerable to rose plant diseases and rose pests, and are not always trouble free.But they are still worth growing, because they add such unsurpassed beauty to
our gardens.Not to worry, here you will find easy solutions for preventing these pesky shrub rose diseases and tips for controlling them.


Preventing Common Rose Diseases
The key here is to prevent trouble from the beginning. To control black spot on roses and other diseases,
there are certain things you can do, right from the start, to prevent or minimize troubles.
Number one, is to choose tough roses that are suited for your particular region.
If your summers are quite hot and humid, buy only varieties that do well and thrive under
those conditions.
Get advise from a good local nursery with a knowledgeable staff. They will guide you to
the correct plant selections.
If you are having problems with you roses, but you don't want to use toxic chemicals, because you have children and pets, or you just hate toxic stuff, and who doesn't, here is a link to my own favorite non-toxic garden products that I use for my roses, flowers and vegetables, Effective Natural and Poison Free Pest Contol , it's a good idea to have some of these products on hand so you can take action right away, before things get out of hand.
Powdery Mildew On Roses
Rose diseases such as powdery mildew is a fungus that thrives on humid nights and warm or hot days. The
symptom is a white powdery residue on leaves. The leaves then become crinkle and distorted.
An exellent proven preventative and Non-Toxic treatment for powdery mildew, as well as Blackspot, is to spray with a baking soda solution.
To Mix Your Own:
Mix together 2 tablespoons fine horticultural oil with 1 tablespoon mild dish soap and a large
tablespoon of baking soda. Mix with one gallon of water and stir thouroughly.
Before spraying, it's best to water your rose plants well and hose down the foilage with a garden hose.
Spray only when the roses are shaded, early morning or evening. Spray all foilage and the canes comletely.
To prevent powdery mildew from attacking your roses, spray weekly with the baking soda solution when leaves
first appear in the spring, then every two weeks thereafter.
This is the proper way to apply the Baking Soda Solution:
To prevent spreading the disease, remove all affected leaves and destroy
them. Water the soil, BEFORE spraying the rose bush and spraying the soil
beneath it, making sure you spray the leaves undersides as well on top of
the leaves. Spray all canes, in fact, thoroughly soak the bush with the
solution, leaving nothing unsprayed. The reason the soil should be sprayed
as well, is because there are 'fungus spores' in the soil as well. So you
want to get rid of those also, to prevent the fungus from coming back."


Most people blame humid weather for rose diseases such as black spot on roses , when the real culprit is overhead
watering and rain, because the leaves have to stay wet for almost eight hours before the
fungal spores can germinate.
It can take between 3-15 days before brownish-black spots with fuzzy edges on the leaves
develop into yellow area. Only treat the plant with spray early morning or evening,
when your roses are shaded.
Some types of roses are considerably resistant to black spot. The rugosa and hybrid rugosa
roses are often said to be immune.
Another variety are the Knockout Roses and the Easy Elegance roses. They are simply the most
disease resistant roses you can find.
Rust On Roses
Rust on roses is a fungus rose disease that most frequently afflicts hybrid teas
and roses with large stiff leaflets.
It's occurs mostly on the Pacific Coast, although given the right climate and
cultivation conditions it can show up anywhere.
The symptoms show up as rusty spots on the underside of the leaves and yellow spots
on top of the leaves.
To control rust on roses, remove all affected leaves and destroy them.
Spray with a dormant non-toxic oil.
To prevent rust diseases, use good sanitation and proper and timely pruning. Prune
before bud breaking in early spring to reduce the number of fungus spores.


Unfortunately, our gardens are home to a lot of insects. However, some are beneficial insects.
The ones that create havoc in your garden are the ones you like to get rid of or minimize. Click on the highlighted headline above for information about the most coomon insects and how to deal with them.
Rose Pests - Aphids
It's no secret that insects love roses. It's almost impossible to have a garden
with no rose pests, especially aphids.
These insects love the new growth, so daily inspection is recommended to avoid infestation.
Aphids excrete a sticky sweet honeydew substance that will turn black when mold grows on it.
The best way to control aphids is to knock them off with blast from your garden hose.
Spray with non-toxic insecticidal soaps available at your nursery. It's smart to purchase
this product while shopping for roses.
A terrific organic way to get rid of aphids is using a homemade organic rhubarb spray. Click on the link below for the receipe and the information you need to apply this spray.
Organic Rhubarb Spray For Aphids

Aphids Feeding On Roses

Japanese Beetles
Most of the problems with japanese beetles occur East of the Mississipi River, but they
can also be a problem in many Western states.
Japanese beetles travel in groups, or swarms, so if you see one there are lot more of them.
The adult beetles are a half inch long with metallic copper-green colored wings.

Japanese Beetles Feeding On Roses

The easiest way to deal with japanese beetles is to pick them off by hand and drop them in
a bucket of soapy water. Do not squash them as this will attract other japanese beetles.
Also, be sure to go after their larvae by treating your lawn, where they live before turning into
beetles that attack your roses.
For your lawn: use Milky Spore or Parasitic Nematodes.
Spider Mites And Other Rose Insects
To prevent other pests such as spider mites from infesting your roses, check your plants
often (daily is best).
Hit the bush with a blast of water from the garden hose, aiming especially for the
leaves undersides.
Spray with non-toxic insecticidal soap if needed.
As I mentioned before, an ounce of prevention.... The healthier your roses are and the more diligant
you are, the less problems with rose diseases you will have.
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