Symptoms and Control Measures of Rose Grey Mold Disease
The introduction of green plants and flowers brought by the editor is about the symptoms and control measures of rose grey mold disease, with the following detailed description.
Symptoms and Control Measures of Rose Grey Mold Disease
It has been rainy for a week now, and many rose growers are worried because of the continuous rain, roses are not getting enough sunlight, which will definitely have a great impact on flowering. However, the biggest impact of the cloudy and rainy weather on roses is that it can easily lead to the bud infection of rose grey mold disease.
Symptoms of Grey Mold Disease
Rose grey mold disease usually directly affects the buds, manifested as spots on the outer layer of rose buds, which cannot open and eventually wither on the branches.
If the rose is already open, it will rot after being rained on for a long time. Therefore, if your rose has buds that cannot open, spots on the outer layer of the bud, and dryness, you should consider that it has been infected with grey mold disease and needs to take measures in a timely manner.
Control Methods of Rose Grey Mold Disease
Rose grey mold disease is most likely to occur when there is a lot of rain in the spring, as there has been quite a bit of rain this spring. After the rose buds show color, if it often rains, it is easy to get infected with grey mold disease. For grey mold disease, it is necessary to focus on prevention because once the rose buds are infected, they cannot be restored to normal.
For the prevention of grey mold disease, we need to clean up the roses in time, including the leaves, dead branches, and remaining flower petals in the flower pot, which may mildew and rot and cause the disease.
For roses that bloom early, they should be cut提前 in rainy times and placed in a vase for display. If left on the branch, after being rained on for several days, they are likely to rot, and once the flower rots, it becomes a super source of infection for grey mold disease.
In addition to eliminating the causes, we also need to use drugs for prevention. The commonly used fungicides such as carbendazim and mancozeb can be used for daily prevention. However, when there is a lot of rain, it is necessary to strengthen prevention. After the rain stops, the medicine should be applied immediately. You can use carbendazim combined with procymidone or propiconazole, and the two fungicides should be sprayed together.
Now many rose buds have started to show color, and there is a lot of rain, so it is recommended that everyone start preventing it as soon as possible. Rose buds are most susceptible to grey mold disease when they show color. Persistence in applying the fungicide once a week can have a good preventive effect.
If it has already been infected with grey mold disease, severely infected buds and flowers need to be cut off, and then the medicine should be applied. If only the outer petals are infected, causing the buds to be difficult to open, the outer petals can be removed, and then the medicine should be applied, so that the buds can still continue to open.
Spring is a very high season for rose diseases and insect pests. For more comprehensive control methods of rose diseases and insect pests, you can refer to the introduction in the book "How to Grow a Burst of Roses from Scratch".
The above specific introduction about the symptoms and control measures of rose grey mold disease is hoped to bring some floral knowledge to flower enthusiasts.