The invasive species are known as main threats of the bio-diversity. The important economical impact they have in the field of agriculture is placing them in a front place among the biotic harmful factors. Each year, the rate of the invasion of the harmful species is increasing all over the world, due to the development of the commerce and of the tourism. The entrance of the invasive species in new areas without a biologic natural control represents a disaster for the agrarian ecosystems. Recently, Europe was invaded by the Western worm of the corn roots, Diabrotica virgifera virgifera Le Conte. The incidence of the harmer in Europe and Romania captured the specialists’ attention and of the European bodies for the substantial changes, to protect the corn production. The first objective considered by the biological combat of this species, new entered species in the corn agrarian ecosystem is consisting of establishing the series of local natural enemies. An exploring of the complex of foreign agents involved in the biological control of the invading species from the origin area is very important, because it is possible to make a selection of those presents at us, too. The necessity of these studies takes place in an initial extension moment, as response to the answer if it is or not possible the introduction of the classical control method in the population reduction of the invasive species and, implicitly, of the economic impact. Another actuality and high importance stage of the project is sustained by the idea of testing some modern biological products, existent on the commercial market, in order to combat the invasive agents. By using the biological methods it is intended the implementation of some non polluting management strategies against them. The present tendency of this combat orientations is regarding this method, due to the high efficiency, but also due to the non-polluting effects. It is intended to protect the utile series from the agrarian ecosystems and also their exploitation in the invasive population control.