why is my roses getting black spots on my roses leaves?
Answers:
Black spot is a fungus disease that appears as round, black spots on the leaves of rose plants. There may be a distinctive yellow band around the black spot and leaves may fall prematurely. Left untreated, black spot may infect young canes.
1. Look for black spot on the leaves of rose plants. This fungus disease will appear as round, black spots ringed by yellow tissue.
2. Water roses only from below. Try not to get the foliage wet when you water.
3. Water in the early morning hours so the rose plant has time to dry during the day.
4. Rake up any fallen leaves from the soil surrounding the plant. Black spot as well as other fungus diseases are transmitted by water splashing back up onto the leaves and stems.
5. Remove any diseased leaves. Pick off and destroy any foliage that has evidence of black spot. Dispose of infected foliage in a sealed plastic bag.
6. Dust roses infected with black spot with sulfur powder. Sulfur will not kill the fungus spores, but it will prevent a new generation from germinating.
7. Spray a solution of 1 tsp. baking soda mixed in 1 qt. warm water in the early morning hours.
8. Spray roses with a dormant oil or Bordeaux mixture when plants are dormant (usually in winter).
Tips:
Black spot is very difficult to eliminate once it appears. Prevention is the best form of defense.
Spray organic fungicides early in the day for best results.
Chemical fungicides are also available for the control of black spot.
Always use the least toxic method of pest control first.
Hope this helps.
Good Luck.
Other answers:
Because you are watering them with a mixture of heroin and water. you should try coke and water instead. Or lsd.
Because you are watering them with a mixture of heroin and water. you should try coke and water instead. Or lsd.
u have to water your roses early in the morning otherwize they get moldy and it is called black spot get some spray at your local hardware store or at a nurseray don't water to much or in the middle of the day or at night. try not to get water on the roses u r saposed to water the roses roots not the leaves. GOD BLESS and happy gardening
its called what it is,black spot. try a fungiside like con-san triple action 20 or orths fungaway. and dont water the leaves, hose water helps spread decise. ps taja is a fool.
Tom
Ohhhh, not good. There is a fungus called Black Spot that is common in humid climates. The result is the characteristic fuzzy edged rounded blackish or purplish spots on the rose leaf. The spots are about 1/8 to 1/4 inch in diameter. On the canes it appears as raised dark reddish or black blotches. Blackspot usually doesn't occur in early spring, but starts to show up in mid summer. The fungus then spreads across the leaf until it finally kills it. The leaf turns yellow and drops to the ground. A rose can quickly become completely defoliated by a bad attack of black spot. Whenever black spot is sighted in the garden it is very important to immediately remove and destroy any infected leaves, including those on the ground and remove them from the garden into the trash. Even if you have to remove the majority of the foliage, it will pay off to do so. The sooner you attack the problem the better off you will be. Spraying after you see symptoms has little effect. Any spraying for black spot must be preventative in nature.
Preventitive treatments for blackspot:
1. The least toxic spray for blackspot is baking soda. Combine 1 tablespoon baking soda and either 2 tablespoons horticultural oil or a few drops of dishwashing liquid detergent with 1 gallon of water. Mix as thoroughly as possible, and try to spray both sides of the leaves once a week. The liquid detergent helps the baking soda stick to the leaves. Reapply after a rainstorm. Baking soda changes the P.H. of the surface of the leaves, making a hostile environment for the fungus to grow.
2. Another treatment is sulfur dust, sulpher or lime sulpher used every 7-10 days.
3. As a last resort there are the more toxic chemical fungicides. They are often used once every week or two and are very effective, provided it is used as a preventative and is not used after the disease is present. As with all toxic chemicals, follow the label directions carefully. Be especially careful to spray properly in hot weather to avoid leaf burn. Spray the undersides of the leaves first.
4. Since a single fungicide may not completely wipe out all the fungi, using that fungicide over and over may actually cause fungus to build up a resistance to that fungicide. Alternating between two fungicides, such as Triforine (Funginex) and Daconil, is recommended to keep fungal resistance from occuring.
In general, fungicides generally can prevent blackspot and other fungal diseases, but do not work too well on an existing case of the affliction.
I agree with the 3rd response. Watering them at the end of the day will cause the black spots. If you must water at that time water from below, making sure water does not hit the leaves. Otherwise it is best to water in the am (before 10 am )
Water in the morning and water at the base, don't get the leaves wet. Some varieties are more prone to this than others.