What causes the black-brown spots on the abnormal leaves of Chinese roses?
For most women, the small experience of caring for green plants caused by the reasons for the abnormal leaves of Chinese roses with black-brown spots is as follows:
Recently, many friends have found that the new leaves of their Chinese roses have obvious abnormal phenomena, and even the buds have many black-brown scars, which look very ugly and strange. So what exactly causes this?
Some friends suspect that it might be a disease? Could it be the famous black spot disease?
But careful friends will find that at the beginning, there were no black-brown scars, just the deformation and distortion as shown in the above picture.
In the training camp group, some students also encountered the same problem, so what exactly is the problem? Is it really a disease? Black spot disease?
What causes the black-brown spots on the abnormal leaves of Chinese roses?
In fact, it is just a common pest of Chinese roses, thrips. Whenever the green plant enthusiasts net tells the friends that it is a pest, there are always some friends who doubt and say: I have looked carefully and found no pests.
In fact, thrips are very difficult to detect, as the pests are very small and are mostly active at night, so it is quite difficult to find thrips pests.
However, thrips can cause significant harm to Chinese roses, easily leading to leaf deformation, new bud shrinkage, and growth cessation.
The harm of thrips to Chinese roses is most evident in summer and autumn. Although there are many thrips in spring, no obvious harm can be seen.
In May and June, it is the breeding season for thrips. If prevention is not taken during this period, Chinese roses are easily invaded by thrips in summer. To prevent the outbreak of thrips in Chinese roses, green plant enthusiasts net suggests that you persist in using medicine for prevention in spring, especially in May and June when thrips are at their peak breeding season, and make sure to spray in time to reduce the number of pests.