Hello! From the attached photo, you can see the presence of scale insects. To control them, we recommend insecticide treatments with in a dose of 7.5 ml/10 L water and , in a dose of 3 g/10 L water. It is recommended to carry out 2 treatments, 7 days apart, and to alternate products. More precisely, if you carry out the first treatment with , you can carry out the second treatment with , 7 days after the first one. In order to increase the effectiveness of the insecticides, it is advisable to add an adjuvant such as Break Thru S 240, 2 ml in a dose of 2 ml/10 L to the solutions. Spray () the mixtures as finely as possible, so that they are distributed evenly on the plant, both on the topside and on the underside of the leaves, as well as on the stem. After they die, these pests remain on the stem and leaves, so it is recommended to remove them with a damp sponge. The prepared solution has a maximum shelf life of 24 hours, so it is advisable to prepare only the amount you need for a treatment, in the appropriate volume of water.
Afterwards, 7-10 days after the treatments, it is advisable to apply a fertilizer that increases the frost resistance and improves the water balance of the plant, such as . It is administered by spreading it around the plants, followed by gentle incorporation and watering according to the label recommendations.
For more information on how to care for your plant can be found in the following article: Magnolia, planting guide and care work .