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Blooming roses in the garden are not only beautiful to look at, unfortunately, they also attract many pests, such as the rose cicadas. These three-millimeter-long and yellow-green insects usually set the roses in the very warm summer months. The consequence of an infestation shows up on the leaves, which turn yellow and go with mold formation. Then must be acted quickly. The rose cicadas can be controlled by recommended natural remedies and in the worst case, of course, with chemical cudgels.
Unfortunately, a massive infestation of rose bushes by rose cicadas in some cases means the safe death of the plant. Because the already hatched larvae live on the stem of the rose and suck out there the important plant juice. It follows that the leaves first assume a yellow color in the middle of the veins, which later extends over all the stemmed leaves. Even the buds receive too little plant juice and do not even bloom, but wither away. However, as the leaf has been damaged, the rose is also susceptible to mold which, without treatment, is the safe end of the plant. Therefore, an attack of rose cicadas should never be taken lightly. The unpleasant animals bring it to two generations in a year, with the second deposit of eggs in the fall, which then hatch again in the early spring next spring and can begin early with the destruction of the rose plants. Especially in very warm summers, the rose cicadas can multiply unhindered and very well.
If you have a lot of roses in the garden, you should take a close look at them, especially in the warm summer, to see if the plants have not been attacked by a pest. Among the most common pests in roses include the rose cicadas, which can cause massive damage to the rose bushes. Therefore, it is important to detect an infestation of small insects early and curb. If the leaves turn yellow and have a white mottling along the veins, then the roses are most likely infested:
- Damage is similar to that of spider mites
- in spider mite infestation, however, there are no animals below the leaf
- Cicadas are yellow, about three millimeters in size and narrow
- the insects resemble aphids and sit on the underside of the leaf
- from here they suck it
- if the nymphs are disturbed, they will escape with wide leaps
- adult rose cicadas, on the other hand, fly away in the event of a disturbance
- their larvae hatch from the eggs laid in the bark
- From here they suck the sap from the stems
- the larvae are cream colored
- they sit on the stems and on the leaves
Unfortunately, there are hardly any measures to prevent the rose cicadas. Because every rose can be attacked by the insects, which are very common worldwide. But if the rose bushes are in a sheltered location, such as near a house wall, then they are more vulnerable. It is better to prevent against cicadas to choose the following stands
- plant the roses in an airy location.
- do not choose a very sunny location
- In addition, a balanced nutrient supply helps to make the roses more resistant to any kind of disease and pests
- Insect hotels near the roses offer, as for example wasps feed on cicadas
If cicadas are found on the leaves in the summer, the rose bush should definitely be cut back vigorously in autumn. Because the pests lay in the summer their eggs for wintering in the bark of the rose. To prevent them from hatching again next year, a radical cutback helps. Use a corresponding sharp and above all disinfected rose scissors, so that the damaged plants can not take any more damage and any bacteria can penetrate unhindered. Other preventive measures are:
- sprinkle around the roses neem powder in early spring, regardless of whether the rose bushes were already infected in the previous year or not
- Neem powder is commercially available and one of the most effective ways to prevent rose cicadas
- after a sufficient irrigation, the active ingredients also reach the upper part of the rose
- The cicadas usually do not infest the pretreated roses
The rose cicadas, like many pests, also have natural enemies with which they can be fought. These include predatory mites, ground beetles, raub bugs and spiders. If the hobby gardener settles these insects directly in the rose bushes, the cicadas can be fought quickly and naturally.
If the first signs of attack by rose cicadas are observed, it is also possible to use chemical means to combat the pests. The trade offers here a variety of insecticides, which should help to combat the cicadas sensibly. The fight should take place immediately after the hatching of the first larvae, so that they can not grow up and thus a second generation is prevented. Therefore, the chemical control should be as follows:
- Leaf undersides with a suitable insecticide, such as against aphids, spray
- Early in the morning is the best time to catch the older animals
- Even roses in the bucket can be affected by an infestation
- For this there is a Quick Granules, which is distributed on the ground and a little incorporated
- Despite being used with the insecticides, it is worth considering radically cutting back the rose plants in the fall of the year in which the plants were infested
- This ensures that eggs are not left in the rose bushes, which could cause new damage next year
If rose bushes are attacked by rose cicadas, this is unfortunately not only a visual, but above all a health problem for the beautiful plants. Because by an infestation not only the leaves are damaged because the stems are sucked out by the larvae. Due to this damage, even dangerous mold fungi can spread on the plant and in the worst case, let them die completely. Against the infestation of cicadas are appropriate preventive measures with various measures, which should also be carried out if the rose bushes were not attacked in the previous year. Because only a healthy and strong plant can assert itself against an infestation. If a rose bush has been attacked, however, only a radical pruning usually helps, so that the plant can drive out new and healthy again next spring.