What is a black spot disease?
black spot disease is fungal diseases that affect roses. The sponge, called diplocarpon Rosae , develops on pink leaves and stems and creates round black spots. Although it is called black spot disease, this fungus can also produce a brown and red spot. This disease causes the leaves of leaves and a drop of leaves, leading to unsightly appearances and weakened plants. Diplocarpon Rosae develops in warm, humid weather and tends to attack at the end of summer.
This disease of plants may lie sleeping on roses during cold or dry weather. When the conditions become favorable, the fungus begins to proliferate. Rosae diplocarboards begin to evolve when the temperature is between 65 and 75 ° F (about 18 to 23 ° C) and the conditions are humid. Late summer, when the weather is often hot and the air is humid, it is the most common time for the disease in the rose garden to evolve.
As soon as the fungus is activated by a combination of the right thread of the pearl and moisture, tIt takes seven hours to start. During this time, there must be pink leaves on which a developing fungus lives. The resulting black spots usually appear within seven to 14 days. The temperature window is quite strict - when the weather rises above 85 ° F (about 29 ° C), the sponge cannot continue to evolve.
The disease of the black spots causes the color of the leaves. Spots can grow up to 1/2 inches (about 1.3 cm) in diameter. The collection of leaves occurs around black spots and eventually spreads throughout the leaf. This fungal infection may eventually cause complete defoliation.
It is also important to realize that irrigation of the infected plant can cause the disease to spread. When water spraying from the leaves, the disputes are caught in drops and can be transferred to nearby plants. Roses should be connected to the base to prevent the prevention and keep the leaves dry. In addition, in hot weather the roses should be connected in the morning to any moisture on leaves BThe heat of the day dried up.
Fungicidal sprays work well in the fight against black spot. There are many products that specifically focus on diplocarpon Rosae . Depending on the concentration, most fungicid sprays are designed for use once a week or once every two weeks until the fungus is removed. Removing dead wood from the plant and infected plant material from the area helps to control the spread of black spot disease. Since the fungus can remain in cold and cold weather sleeping, all plant material should be destroyed in the incinerator to prevent it from spreading.