Judas Tree Glue

Question: Judas Tree Glue

Hi, I have a problem with my three guide trees that I have in the garden and I very much hope that you can give me definitive help, since we have tried many things but with no result.
Every year from the end of April until the end of May, little animals appear on the leaves that produce many drops of white glue. This glue is washed away with soap and water, but it is really very annoying, even for my dog, who lies down in the garden and sticks all the hair under his fingertips. We tried many pesticides for lice and lately in a nursery they told us to try an "Eko Oil Spray" product, but even this didn't work ...
Can you tell me some products that can finally solve our problem?! Thanks in advance

Answer: Judas Tree Glue

Dear Nadia,
the cercis siliquastrum (Judas tree) are medium-sized saplings, or large shrubs, with deciduous leaves, with a beautiful flowering in late winter, when the tree is still without leaves; every year, punctually, as soon as the minimum rises, and the leaves begin to develop, small parasites lurk on the underside of the cercis leaves; generally it is psylli, or tiny flies, which in the first stages of life stop on the underside of the plants, whose sap they suck. The metabolic residue of these insects are annoying droplets of honeydew, which sometimes also appear hard to the touch, and very sticky. Unfortunately these insects are quite difficult to defeat, also because the adults winter in the folds of the wood of the tree, and therefore, when we notice the droplets of honeydew, it means that these adults have already laid their eggs, and these have already hatched; therefore the main problem lies in the fact that when we realize the presence of insects on our cercis, a kind of invasion has already taken place and therefore we must already struggle with a large population of insects, and not with the first few specimens. In addition to this, often the use of broad-spectrum insecticides in the garden, causes the lack of predatory insects, which could already help us to contain the larvae and nymphs of psylla. Generally, soft soap is simply used, with which a washing solution is prepared for the leaves; I understand, however, that since it is a tree with large leaves and thick foliage, washing is neither easy nor decisive, since it becomes very difficult to remove all the specimens that populate it. You could use biological insecticides, low deficiency, mixed wanting to white oil; in essence the oil dissolves the waxy coating on insects, allowing the insecticide to hit them; in addition to this, the white oil allows the insecticide to adhere to the leaves, acting for some time as a barrier to the presence of other insects. Clear that, to make the operation simpler, it is quite useful to think of pruning the little tree, which has already blossomed, shortening all the branches by about a third, and thus making the number of insects on the plant smaller. .