Hideous blackspot on all my roses, can I cut them back?...

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Hideous blackspot on all my roses, can I cut them back?...

Post by Kriss » Sat, 11 Aug 2012 00:55:29



Hi
We moved to a house with a lovely rose garden, however, that lovely rose
Garden is seriously ill! All the roses (David Austins) are covered in
black spot. I began to remove the offending leaves before spraying but
it is too prolific!
I am completely new to gardening and caring for roses and I as such, I
have two questions that I hope someone can help me with...

I was wondering if I could just cut all the rose bushes right back (the
steams look ill too).

Can black spot spread to other plants, as my clematis and some weeds,
are now covered in spots that look very similar!

Thanks guys.
Krissy

--
Krissy

 
 
 

Hideous blackspot on all my roses, can I cut them back?...

Post by mjcicca.. » Sat, 11 Aug 2012 23:48:41


Quote:

> Hi

> We moved to a house with a lovely rose garden, however, that lovely rose

> garden is seriously ill! All the roses (David Austins) are covered in

> black spot. I began to remove the offending leaves before spraying but

> it is too prolific!

> I am completely new to gardening and caring for roses and I as such, I

> have two questions that I hope someone can help me with...

> I was wondering if I could just cut all the rose bushes right back (the

> steams look ill too).

> Can black spot spread to other plants, as my clematis and some weeds,

> are now covered in spots that look very similar!

> Thanks guys.

> Krissy

> --

> Krissy

How hot is it where your are and or when will it be cooling off? You don't want to cut them back if it is hot, take off as many leaves as you can and wait for cooler weather. Black spot does spread.
MJ
 
 
 

Hideous blackspot on all my roses, can I cut them back?...

Post by Kriss » Sun, 12 Aug 2012 01:42:00


How hot is it where your are and or when will it be cooling off? You
don't want to cut them back if it is hot, take off as many leaves as you
can and wait for cooler weather. Black spot does spread.
MJ

Thanks for replying...
I'm in Gloucestershire and it has been very wet, although glorious the
last few days!
I have noticed, now that I'm aware of the disease, that our pear and apple
trees are riddled with it and they are impossible for me to attack! In
fact, it is bloomin' everywhere!
Shall I just live with it until Autumn, then get rid of all leaves and
prune the roses?
Thanks
Krissy

--
Krissy

 
 
 

Hideous blackspot on all my roses, can I cut them back?...

Post by mjcicca.. » Mon, 13 Aug 2012 20:20:46


Quote:

> How hot is it where your are and or when will it be cooling off? You

> don't want to cut them back if it is hot, take off as many leaves as you

> can and wait for cooler weather. Black spot does spread.

> MJ

> Thanks for replying...

> I'm in Gloucestershire and it has been very wet, although glorious the

> last few days!

> I have noticed, now that I'm aware of the disease, that our pear and apple

> trees are riddled with it and they are impossible for me to attack! In

> fact, it is bloomin' everywhere!

> Shall I just live with it until Autumn, then get rid of all leaves and

> prune the roses?

> Thanks

> Krissy

> --

> Krissy

Yes, that is what I would do. Are you spraying?
MJ
 
 
 

Hideous blackspot on all my roses, can I cut them back?...

Post by allen7 » Sat, 18 Aug 2012 16:01:55


Krissy;966417 Wrote:

Quote:
> Hi
> We moved to a house with a lovely rose garden, however, that lovely rose
> garden is seriously ill! All the roses (David Austins) are covered in
> black spot. I began to remove the offending leaves before spraying but
> it is too prolific!
> I am completely new to gardening and caring for roses and I as such, I
> have two questions that I hope someone can help me with...

> I was wondering if I could just cut all the rose bushes right back (the
> steams look ill too).

> Can black spot spread to other plants, as my clematis and some weeds,
> are now covered in spots that look very similar!

> Thanks guys.
> Krissy

Blackspot, "Diplocarpon rosae", is a *** fungus that manifests itself
on rose bushes as black spots on leaves progressing to black spots
fringed with yellow rings on both sides of the leaves. As they develop
the spots enlarge. Eventually, as the disease spreads, the entire leaves
will go from green to yellow and then drop to the ground. With time the
entire rose bush may become defoliated. Leaves less than two weeks old
are the most susceptible to this disease.

Once you have discovered that your rose bushes are infected it is best
to prune off the damaged parts of the plant and gather the diseased
foliage. Dispose of this diseased material in bags or burn it. Do not
add to the composter, as the fungus shall only return to haunt you when
you recycle the soil back into the garden. It is vital to do an end of
season cleanup so the spores will have no where to hide over winter.

After having removed the diseased parts from your rose bushes it is
necessary to apply a preventative formula to minimize further attack.
Using fungicidal soap or sulphur several times over the course of summer
is one solution (especially after rain as these products tend to wash
off). There are a few home remedies that have met with some success and
are worth trying, especially for those that really do prefer organic
garden methods. One is a solution made with baking soda: dissolve 1
teaspoon baking soda in a quart of water, add a few drops of liquid soap
to the mix to help it cling better to the foliage, spray infected plants
thoroughly. Another unusual remedy for fighting fungal diseases is
manure tea. This formulation fights blackspot, as well as mildew and
rust, while providing foliar nutrition. Place one gallon of
well-composted manure in a 5-gallon bucket and fill with water. Stir the
mixture well and let sit in a warm place for three days. Strain the
mixture through a cheesecloth or mesh and use the resulting tea to spray
disease affected plants (the solids left behind can be applied around
the base of the plants as added fertilizer).

--
allen73