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I just planted my first rose plan (tea hybrid)t 2 weeks ago. Not long after that, I discovered the leaves were getting black spots. I sprayed some 'Rose Clear Ultra' a week ago. Now, a week later, more leaves are having black spots. What shall I do to it?
It should survive. Black Spot is about the most common rose problem.
There's not much you can do once the disease is in place. You can't kill it off. Bear in mind, too, that you can spread the disease via your hands and things like secateurs. The rose will shed its leaves for winter. Gather up all the diseased leaves, destroy them, and always try to keep the surrounding area clear of diseased bits of plant.
Spraying against any fungal disease has to be preventive - which is to say, before the symptoms appear. So if you spray next season, start early.
For the first year ever my roses got blackspot. Spayed them with no luck. Will spray them earlier next year. thanks Italophile
I've tryed everything but the only thing that seems to work but not 100% is Jeyes Fluid
the Discinfectant, or washing up liquid plus water spray it keeps it down but doesn't
Black spot seems to start really early, disappointed to read there is no way to prevent, once it appears.. Heading out to the garden now
weather here in Dun Laoghaire is perfect
Lots of useful info here http://www.rosemagazine.com/articles02/pages/blackspot.asp and buying resistent varieties certainly makes a difference.
Sadly one of my favourites, Mme Alfred Carriere, has proved to be very susceptible.
As has been said, garden hygiene is a good preventative - this means picking up and burning all affected leaves when the fall off the bush.
Mulching over winter and spring helps prevent the spores from reinfecting the plant, and don't forget that a strong and healthy plant will have much better resistance to the effects of black spot, so when you plant your roses prepare the soil well and remember to feed them.
And on the bright side, the reason black spot is more prevalent than it was in our parents' youth is because of the improved quality of the air we breathe - when it was full of sulphur and smoke from coal fires the black spot fungus couldn't cope
kathleen salter wrote (see)
I've tryed everything but the only thing that seems to work but not 100% is Jeyes Fluid the Discinfectant, or washing up liquid plus water spray it keeps it down but doesn't cure.
What solution of Jeyes fluid do you use, please, Kathleen?
As I have ranted before, this year's Roseclear3 formulation is half the strength of last year's in that for the same price you will only be able to make up half the volume of spray!!! WHY!!!!
I do know that Roseclear was banned in 1996 and must have been reformulated at that point; and that in 2010 it was reformulated because of an ingredient called Bifenthrin. Maybe the reduction in strength is because of ongoing problems?