If you have recently attempted to water your roses and have discovered that they have become discolored, the next step is to find out why. Will black spot kill my roses? If you discover that the leaves of your rose plants have developed an unsightly black spot on them, it could be a serious problem. Before concluding that your roses are suffering from this disease, you should first find out exactly what it is. Here are some helpful facts regarding this problem.
Black spot, Diplocarpon semperculata, is an invasive fungal disease specifically to roses. It is caused primarily by a particular fungus that usually thrives in full sun, wet, and warm conditions. The spots initially are flat and round, with irregular edges. However, when a severe fungal infection is present, the patient roses may also appear as one large lump.
To stop the spreading of this plant disease, you should try applying one of several solutions available: neem oil, lemon juice, essential oils, or tea tree oil. Neem Oil kills off the bacteria that causes the infection. Lemon juice eliminates the sour smell coming from the infected leaves. Essential oils such as tea tree help to fight off the fungus and reduce the severity of the spot formation.
If you live in a climate where the seasons are often changeable, your rose garden can be severely affected if only partial sunlight is offered to the plants. For example, partial shade can prevent formation of black spots in your rose bushes if your garden is situated in the shade. You can also use mulch to prevent the stems from drying out during dry periods. Mulch can provide good protection for the roses from cold weather.
A second method is to use a black spot on your roses using natural methods. First, you need to remove all dead leaves, stems, or pruning away from the main plant. After this is done, spray the plant with organic fungicide (spores, prevention, or rot) by brushing the leaves, then allow them to dry completely. Wait for the fungus to dry completely before spray it again.
For prevention, you can prevent the occurrence of black spots on your roses by washing or rinsing your roses at least once a week with soap or a water-based fungicide. In addition, avoid watering your roses. Just like with diseases, excessive watering encourages fungi growth. This encourages the survival of fungal diseases among the leaves, stems, and roots.
Powdery Mildew: Powdery Mildew is another common disease control for your roses. It can be found on the lower leaf surfaces and stems. You can apply the fungicide directly on the affected areas by using a sprayer or powdery mildew can also be added to a water-based fungicide. The powdery mildew will cause yellowing of the leaves and will eventually turn the entire plant black.
The treatment is simple. You can first soak the infected leaves in water and allow them to dry. Then wash them with a sprinkler of water and let them dry.
To prevent Powdery Mildew, you can dip the leaves in a fungicide. If the leaves are not allowed to dry, it will spread on the entire plant. The fungus could survive and continue to infect new canes, resulting to a fatal situation on your tea roses. If you notice that some of the new canes are already infected by the fungus, you can spray the leaves with fungicide.
Dry Shrub Disease: Rose plants’ health depends on moisture. Most plants require only moderate humidity levels to thrive. In cases of extreme drought, especially in hot, dry conditions, moisture levels drop below the desired levels for the plants. This can result to a lack of nutrients and ultimately, plant diseases. The leaves and stems of your plants may turn yellow and fall off.
To prevent this from happening, you can use a fungicide. It has been found out that the most effective and quickest way to kill fungal diseases is by using fungicides. You can spray your garden or plant with a fungicide at least four steps before the onset of fungal disease. If the infection hasn’t spread yet, you can apply them all four steps before the disease spread on your roses. If you can manage to control the weather conditions, you can spray your plants at least one day before a heavy rainfall or summer heat.
Neem Oil kills microorganisms and protects the physical plant structure. Its high neem oil content makes it a perfect fungicide. Neem oil is available at different rose garden stores or you can order it online. When choosing where to buy neem oil, make sure that it’s natural and organic. The most popular source of new oil today is through internet stores. To get the best result, it’s suggested that you shop through reputed store.