What to do if the shoot of the rose is bitten by insects
For most women, the small experience of green plant maintenance when the shoot of the rose is bitten by insects is as follows, here is a comprehensive introduction.
What to do if the shoot of the rose is bitten by insects
Recently, in a home flower training camp, a flower enthusiast asked such a question. One of her rose bushes was first laid eggs by rose sawflies and then bitten by insects, suffering from bacterial infection, with a section of the epidermis on the branch turning black.
Facing such a rose branch, pruning is definitely necessary. It can be seen that due to the infection of the wound, not only some of the epidermis of the branch has turned black, but the branch also has a slightly yellowish appearance. If no treatment is performed, it will definitely be pruned later.
However, this branch is still quite thick, and it is a bit regrettable to cut it off directly. Therefore, I suggested to our flower enthusiasts to perform a high-pressure treatment, and if it survives, it can be used as a backup seedling.
Specific method: High-air layering is also a propagation method of layering. It has a high survival rate. For this problem branch, the following treatment is recommended:
1. Clean the epidermis of the black part, make a circumferential cut, and take some healthy epidermis.
As shown in the above image, the red框 part should be treated with a circumferential cut. After the circumferential cut, apply a solution of carbendazim, with a concentration of 500-800 times, dip a cotton swab and apply it to the ring peeled area.
After the carbendazim dries, apply a rooting solution, or you can apply rooting powder directly if available. But for this kind of diseased branch, it is recommended to use a reliable rooting agent, as most of the free rooting powders are just psychological安慰, with little practical significance.
After the ring cut is treated, wrap one end with a plastic bag and fill it with sterile soil such as perlite, vermiculite, or sphagnum moss, then wrap it well.
Like this picture, of course, this picture is from a previous layering that has already developed many roots.
This is a rescue layering for our flower enthusiast's diseased branch. Layering can also be used for propagation in daily cultivation.
When performing high-air layering, it is first necessary to select a suitable branch for layering. The branch should not be too soft or too thin, as it may break easily.
What to do if the shoot of the rose is bitten by insects
Select the part to be layered and first perform a ring stripping. The width of the ring stripping should be 1.5 times the diameter of the branch. It should not be too wide, as the branch may break easily, nor too narrow, as the wound may heal without forming roots.
In order to promote rapid root formation, you can apply a rooting agent, simply dip a cotton swab and apply it to the cut epidermis, then wrap it with soil in a plastic bag.
Under higher temperatures, with the application of a rooting agent, roots can grow in 20 days. Without using a rooting agent, roots will grow in 40 days under natural conditions, and it will take longer if the temperature is low.
It should be noted that when doing high-air layering, if the plastic bag is transparent, it is best to wrap it with a layer of black tape on the outside, otherwise it may grow moss. Too much moss can cause hypoxia and affect root growth.
Let's take a look at the effect of the high-air layering done by Green Plant Enthusiast website a month ago.
This is the result of 30-day high-air layering on an old rose stock. Are these roots impressive?