Take this action on the roses now
Let's talk about the experience of maintaining green plants by taking this action on roses now, and follow the editor to see it together!
There has been a lot of rain during this period, with continuous rain in many areas. The rainy spring combined with the warm winter last year is not really good for roses. After being soaked in the rain for a few days, our rose friends have found that the roses have grown hair!
Of course, growing hair is a bit too much, usually it doesn't happen, maybe it's because it's been suppressed for too long...
Just kidding, the reason for this hairy growth is mainly because the branch is withered and not pruned, coupled with long-term humidity. You just need to cut off this branch and apply carbendazim to the cut to kill germs.
Hairy growth is rare, but yellow leaves and black spots due to long-term cloudy and rainy weather are really normal. Especially this year, it seems that various diseases and insect pests are more severe than previous years. To prevent rose diseases and pests, besides spraying chemicals, we can also reduce the incidence of diseases and pests by removing some rose leaves and branches in advance.
Properly remove rose leaves to prevent diseases and pests
This pot of roses has developed a large number of yellow leaves with black spots after being rained on continuously for a week. It's time to remove these yellow leaves when the rain stops.
If these yellow leaves are not removed, they will fall off naturally, but the decaying process in the pot is more likely to lead to rose diseases, so removing them in advance is a better choice.
When removing yellow leaves, it is recommended that you also remove some old leaves and blind branches. Rose black spot disease usually first infects old leaves, and the red spider mite also first occurs on old leaves.
If old leaves at the bottom of the plant are removed in advance, the black spot disease pathogens and red spider mites on the surface of the potting soil are less likely to infect the leaves. Pruning internal blind branches can also enhance ventilation inside the plant and reduce the incidence of yellow leaves, black spots, and red spider mites.
Many rose friends do not recognize blind branches of roses. The picture above shows a blind branch of a rose. A blind branch is a branch without a terminal bud. The blind branch in the picture is relatively easy to identify. There is another type of blind branch that is shorter and smaller, please see the picture below.
This kind of bud that is completely invisible is also a blind branch, which most easily occurs in the interior of the rose plant and on weak branches. This type of blind branch should be directly removed. If there is a branch that has grown a blind branch, you can cut the branch below without completely breaking it off. Of course, if it's very weak, it's recommended to break it off directly.
If your seedlings are very young, then the external blind branches should be kept, as the young seedlings have weak roots and need to rely on these leaves for photosynthesis to produce nutrients.
After a round of cleaning, this pot of roses feels much cleaner, but it's still not enough. While it's not raining, quickly spray a fungicide and insecticide again. You can mix carbendazim and dinotefuran together for spraying, which can prevent black spot disease and aphids.
This article shares comprehensive knowledge on how taking this action on roses now can effectively prevent black spot disease and red spider mites, hoping it can help you.