Phytosanitary Treatments – Endotherapy Vegetation is considered an irreplaceable element. In fact, it accomplishes health and architectural functions of primary importance; therefore, until the green can carry out these functions, it is necessary to know how to correctly handle agronomic techniques in all of its aspects. The urban green and not, represent an artificially constructed ecosystem and are subject to uncontrollable parasitic attacks. The phytosanitary treatments come out of the necessity to guarantee clients control over the adversities of ornamental plants utilizing biological and biotechnological methods able to combat parasites with the use of antagonistic organisms like this reducing the cost on an environmental level. Besides the classic aspersion treatments, the active principle can quickly enter the lymph circuit of the plant by radical absorption employing specific formulas. Endotherapy under controlled pressure is a very valid method for the cure of problems of arboreous plants (phytophagi, fungi) respecting the surrounding environment and people destroying public health risks. Taking advantage of the plant’s own vascular system, the active principle is injected directly into the trunk of the tree, which is moved with the natural ascendent lymphatic current of the plant. This technique is effective and active compared to the conventional methods in that it is very selective and avoids the dispersion of the phytosanitary products in the environment. Endotherapy is particularly indicated for the disinfestation of Cameraria ohridella (Horse chestnut leaf miner) and of Corytucha ciliata (Sycamore lace bug), as well as, aphids and other infections, even fungi, on various essences. It is recommended that endotherapeutic interventions are only executed by highly specialized companies.