Water-soaked black and brown stains on plant leaves and stems are frequently indicative of a fungal or bacterial illness. Adjust the watering schedule and don't let plants sit in standing water. Remove and discard any soft or discolored stems or leaves. If the problem persists, see a botanist.
Leaf spot is a fungus and bacteria-caused ailment that causes dark, black splotches to appear on the leaves of afflicted plants. These spots are primarily aesthetic in nature, although severe occurrences can be harmful to the plant's health. Leaf spot is common on many plants, but some are more prone to its occurrence than others. The best way to prevent leaf spot is to provide your plant with adequate sunlight and good air circulation. Make sure not to overwater your plant.
If you are seeing these black spots on your leaves, it may be time to give your plant a good cleaning. Use a soft brush to gently sweep away any dead or diseased material. Do not use chemicals to clean your plant, as this will only harm them further. Instead, try using horticultural oil or water in place of soapy water.
If you continue to see these black spots on your leaves, call a local gardening center or agricultural department for advice. They may have suggestions on how to prevent further occurrences.
Dark, water-soaked patches on the leaves of your basil plant may suggest a bacterial leaf spot infection caused by the bacterium Pseudomonas cichorii. Wet stem rot may develop as a result of the symptoms. Remove affected leaves when your basil plant is dry to control bacterial leaf spot. This is important because infected leaves will spread the bacteria to other parts of the plant.
Dark spots on the leaves of your basil plant may also be due to insects. These spots are usually not water soaked and do not involve the whole leaf, so they should not be removed. Instead, use insecticidal soap or agricultural sprays to kill the insects.
Finally, dark spots on basil leaves can be caused by environmental factors such as sunlight or moisture. The spots will not be water soaked and there should be no stalk left behind, so removing the whole plant rather than just the leaves is necessary to prevent spreading of the disease.
Basil is an herb that is used in many dishes around the world. It has a distinct flavor that some people love and others find too strong for their taste. Dark spots on basil leaves are also considered an offense by some people because they think it means the plant was not taken care of properly. However, these spots are actually more common on plants that were grown in improper conditions.
Watering. Plants' leaves can become black if they are overwatered. By this point, the plant usually has irreparable rot and cannot be rescued. To avoid this, don't overwater your plants and make sure the container they're in has a hole at the bottom for any extra water to escape. If some of your plants start to look sick or yellow, check with a garden expert before taking action so you don't cause more damage by trying to rescue them yourself.
Black spots on leaves are usually caused by insects feeding on the leaf tissue. Black spots on flowers are often caused by beetles that feed on the pollen or seed pods. Insects that eat plants's roots include beetles, flies, wasps, and worms. Root-eating animals include mice, gerbils, squirrels, and birds. The most effective way to control insect pests is with pesticides, but you can also use cultural practices such as keeping weeds around your plants under control and choosing attractive planting materials that will help deter pests.
Plants need sunlight to grow healthy leaves and flowers. If their environment isn't right, their leaves may turn black due to stress. Dark-colored plants are considered unhealthy because they lack the light needed to produce nutritious food. When selecting plants for your yard, choose varieties that are vigorous and have dark green leaves. These indicate that the plant is doing well and that it should survive in your garden.
These blotches are produced by a fungal illness known colloquially as "Tar Spot." In many cases, the leaves with the black spots are falling prematurely, adding to the anxiety. The black patches that resemble large drips of tar are unsightly, yet the illness does not harm the tree or impair its overall health.
The cause of the Tar Spot is a fungus called Monotropa uniflora. This fungus grows only on members of the family Lomaridaceae which includes hydrangeas and trilliums. The spores of M. uniflora are spread by air currents and water droplets to other lomaroid plants. When they reach another host plant, they infect it with new growth and more spores. There is no evidence of virus involvement in this disease.
Maple trees grow well in rich soil with plenty of organic matter. They like full sunlight but don't require much heat. Maple seeds need moisture to germinate, so try to provide adequate rainfall. Once seedlings emerge, they can handle some drought once they develop their own storage roots.
Trees infected with Tar Spot lose their lower leaves early in the fall before their upper leaves appear. Because these fallen leaves contain high levels of toxic chemicals, don't burn them. Instead, throw them in the compost pile or leave them where they will decompose naturally.