Current trends in control regard this method because high efficiency and non-pollutants effects of course. In this way, it follows protection of useful scale from agroecosystems and their exploitation in control of invasive population. Incidence of western corn rootworm, Diabrotica virgifera in Europe and Romania attract the specialist’s attention and European organisms regarding substantial changes, which save the yield. For distinguish the frequency zones of invasive species accomplished a statistics for establish research locations from abundant zones of Diabrotica species dependent on last years monitoring. The results distinguish the follow zones: Timişoara (783 – 900 adults), Jimbolia (603 – 4030 adults), Deta (712 – 1901 adults), Lovrin (656 – 1975 adults), Peciul Nou (898 – 1481 adults), and Şag – Arad (903 - 2000 adults). It were take the soil and surface samples for establish the presence of control biological agents. The maximum appearance period of invasive species is very important in establishing the analogy with appearance of predator’s species. From natural enemies of Diabrotica v. can be notice spiders: Theridion impressum (Araneae: Theriidae), Agriope bruennichi (Araneae: Araneidae) Speira diademata (Araneae: Araneidae), Pseudophomus rufipes (Coleoptera: Carabidae). In specialty literature from our country there not information or research results regarding the biological control of pests, so we intend to make known to all interested persons in health plants some ecological alternatives by pest reduction and damage level, too.

biological control; natural enemies; Diabrotica v.

Presentation: oral