Something is wrong on my rose bush, help.?

Question

I live in southeastern ohio, the leaves on my roses are getting brown spots, turning yellow and falling off. My roses are still blooming.

Answer 1

I agree with Anigma,

I think you've got blackspot. It's a common problem on most modern hybrid roses. Ofcourse, I can't see your plants, so in order to have a conclusive diagnosis, take some diseased leaves to your local independent garden center or nursery. They should be able to help you.

As for dealing with it. Black spot can defoliate your plant, but next year, the plant will be back to it's old self. After years of this sort of problem, the rose can die out. I have been using a miracle of a product from a company called Bonide, the product is called "Infuse". My roses are the 'cleanest' they've ever been! Ortho makes a product called 'Daconil', which I've used in the past. Regardless of which you choose, always apply as directed on the label!

In the fall of the year, after the leaves have fallen off, apply a Lime-Sulpher spray. That will help to kill off overwintering fungal spores and insect eggs. Start your preventative fungal sprays in Mid-June of 2008.

Fertilize your Rose-bushes as normal, I recommend a highly organic fertilizer such as Espoma 'Rosetone'.

I hope that this helps
Good luck

Answer 2

It sounds like you are describing black spot which is a fungal disease caused by excess moisture. First thing you need to do is clean up all the debris around the plant including the mulch because the fungus can survive on the ground debris even through the winter. Next remove all the infected leaves and discard in the garbage. Do not put them in compost or your yard. Next you can purchase a product called Othor Rose defense. Spray the plant once a week making sure to get the tops and bottoms of the leaves as well as the canes.
If you would prefer organic way to fight black spot the get two 32oz water bottles and in one bottle add 1Tbs of Apple cider vinegar, 1/4tsp of dish soap, and 1/4tsp of canola oil, fill with water and spray once a week. In the other bottle mix everything the same except instead of vinegar add 1 Tbs of Baking soda. The vinegar solution changes the pH and the fungal spores hate that and the Baking soda solution kills the spores. Use each solution once a week, but each on a different day like one on Sunday and pne on Wednesday for example. Good luck

Answer 3

I think you're describing what is call 'rose black spot'.
Small dark spots appear on the leaves at first. This is the mycelium growing. The leaf often turns yellow and falls off weakening the rose; they may spread to the leaf stalks and the stems.
This fungus spreads by means of asexual spores (conidia) throughout the summer. These are carried in water splashes and develop into new spots especially in warm, damp weather. The infection overwinters as a mycelium on fallen leaves, in the leaf axils and as small stem infections.

Remove any fallen leaves which will carry the infection through winter to the next growing season. Cut out any stems which show signs of infection before bud break in spring. Some varieties of roses are more resistant.
You'll find the website listed below helpful.

Answer 4

Not sure about Ohio - but in the UK that is a leaf fungal infection called "rust"

If you want to treat it very effectively and are not concerned about being organic then go to your garden centre (nursery or US equivalent that sells plants!) and ask them for rust treatment. If you take a few leaves along it will clarify what the local terminology is for it and the appropriate treatment.

Those who prefer the organic route can use a mild detergent solution in a mister - but this is nowhere near as effective.

If untreated it is unsightly and will stunt this years growth - next year it may be unaffected!

Hope this helps

Answer 5

Yes - soapy water is good for aphids (and generally as it breaks down) but black spot or rust requires a spray (in my view) - the strongest you can get in its type (you gotta be careful because some of them are so diluted the do nothing!). I've tried all the herbal new aged stuff and the leaves keep going that way. If you let black spot go it will destroy the bush totally.

Answer 6

toss dishwater on them. Yeah, I'm serious. Wash some dirty dishes in a pan instead of the dishwasher, use dawn or similar dish soap. toss the water on them, and keep doing it for a while.

Why, you ask?

The soap makes the bugs go away, the extra water helps the plants, the food particles act as fertilizer.

Answer 7

it variety of seems such as you're describing black spot it somewhat is a fungal ailment brought about with the aid of extra desirable moisture. first element you will prefer to do is sparkling up all of the debris around the plant which comprise the mulch utilising fact the fungus can proceed to exist on the floor debris even indoors the direction of the wintry climate. next do away with each and all of the tainted leaves and discard indoors the garbage. do now not placed them in compost or your outdoor. next you are able to desire to purchase a product noted as Othor Rose risk-free practices. Spray the plant as at as quickly as as each week making particular to get the tops and bottoms of the leaves as precise utilising fact the canes. in case you are able to p.c. organic and organic and organic and organic thank you to wrestle black spot the get 2 32oz water bottles and in one bottle upload 1Tbs of Apple cider vinegar, a million/4tsp of dish cleansing cleansing soap, and a million/4tsp of canola oil, fill with water and spray as at as quickly as as each week. interior of diverse bottle combination each ingredient a similar diverse than as a substitute of vinegar upload a million Tbs of Baking soda. The vinegar answer differences the pH and the fungal spores hate that and the Baking soda answer kills the spores. Use each answer as at as quickly as as each week, yet each on a diverse day like one on Sunday and pne on Wednesday as an celebration. reliable success

Answer 8

Watering too late in the evening? This can cause s fungus.