Rose black spot

• Rose black spot is caused by a fungus
• This causes the leaves to develop purple or black spots - the leaves then turn yellow and fall off
• Rose black spot causes the rate of photosynthesis to fall which reduces the rate of growth of the plant
• Rose black spots fungus can be spread by water or by wind
• One way to treat rose black spot is by spraying the plants with chemicals which kill the fungi (fungicides)
• another way to treat rose black spot is by removing the infected leaves and destroy them