Rose Diseases and Pests Identification and Control
This article provides you with detailed experience on the identification and control of rose diseases and pests in green plant maintenance. Here is the detailed introduction.
Rose Diseases and Pests Identification and Control
Recently, there has been a lot of rain, and many rose enthusiasts have found their roses suffering from black spot disease to varying degrees. What should we do when roses get diseases and pests? Many rose enthusiasts' first reaction is to cut off the leaves with diseases and pests.
Many experienced gardeners also teach us to do this, such as removing leaves with black spots or leaves infested with red spiders. Do you do the same?
Should leaves really be cut off after roses are infected with black spot disease?
After discovering that roses have black spot disease, whether to cut the leaves should be treated differently.
Early Stage of Black Spot Disease
When you find that only a few leaves are infected with black spot disease, you can remove these leaves. Removing the leaves is equivalent to blocking the source of infection for the black spot disease pathogen, which is very beneficial for the prevention and treatment of black spot disease. After removal, you should immediately spray fungicides to prevent and treat.
Moderate to Severe Stage of Black Spot Disease
But if you find that many leaves are already infected with black spot disease when you discover it, Green Plant Enthusiast Network suggests that you directly spray fungicides instead of removing the leaves, as at this point, 1/3-1/2 of the leaves are already infected, and a large number of leaves have fallen off. If you also remove the infected leaves, there will be few leaves left on the rose.
The problem is that removing diseased leaves does not solve the problem. On the contrary, removing a large number of leaves can reduce the photosynthesis of the rose, affecting its overall growth and making the rose weaker.
Therefore, for moderate to severe black spot disease in roses, you just need to stick to using fungicides to kill the pathogens. Make sure to spray the medicine on both sides of the rose leaves and also on the surface of the potting soil to kill the pathogens comprehensively.