O.M. MOVCHAN
The Main State Inspection Service of Plant Quarantine in Ukraine
P.O. MELNYK
Ukrainian Scientific-Research Station ofPlant Quarantine
N.A. KONSTANTYNOVA
Ukrainian Central Scientific-Research Laboratory of Quarantine

Corn is one of the most important cultures in Ukraine, where much attention is paid to its growing. Yearly this culture occupies the square equal to 1,7 mil. Ha.
Taking into account a considerable potential of corn in the frames of general corn balance, all technological processes directed at providing its stable production, are under special attention of specialists and scientists.
Control over the development of harmful organisms, prognosis and control in advance aimed at avoiding damages of yield, gained special weight today.
As the adventive species of Diabrotica virgifera virgifera appeared in Ukraine, the first years were dedicated, first of all, to propagandizing the knowledge about this harmful species not only among specialists, but also among common public.
As a result, these years the multitude of conferences, TV and radio programs were organized, methodical recommendations, posters and postcards were edited, containing detailed data (according to American and European authors) on biology, morphology, and other data concerning the development and harmfulness of Diabrotica virgifera virgifera.
Ukraine gave its specialists the opportunity to take part in all international conferences, dedicated to this problem. Specialists and scientists were informed about the materials, provided by researchers from abroad.
During the recent years Ukrainian National Service of Phytosanitary has been monitoring Diabrotica virgifera virgifera. Active and goal-oriented work of specialists gave its results. It helped to discover the pest in August, 2001 in Zakarpattya, on the bordering line of Ukraine with Hungary and Romania. They were caught on the pheromone traps, made in Moldova. Revealing in-time provides the effective control over distribution of Diabrotica virgifera virgifera in Ukraine in the future.
On the whole, in 2001 the specialists of National Service monitored the territory of 500 thousand Ha in 25 geographical regions and 106 administrative units of Ukraine. In general, pheromone traps of Moldavian, partly Hungarian and Ukrainian syntheses were used. The total amount of 1200 traps were made use of
Pheromone traps were installed in the second half of July. Every ten days the inspectors of Phytosanitary Service made calculations and took specimen from pheromone traps, which were sent afterwards for analysis to the Laboratory of Quarantine. Pheromone capsule in traps was changed every 30 days.
During investigations more attention was drawn to Zakarpattya, Chernivtsi and Odessa regions, as they are bordering with Hungarian and Romanian regions where Western Corn Rootworm is widely distributed.
On August 15, 2001 the first time in Ukraine the imago of Diabrotica virgifera virgifera was revealed by specialists of Phytosanitary Service in such inhabited places as Kholmovets, Julivtsi and Bobove of Vynogradiv region in Zakarpattya, a bit later - also in Dyakovo. On August 22, 2001 in Beregiv region of Zakarpattya the imagoes of Western Corn Rootworm were noticed in Kosyno and Chetovo, later - in Astcj (see Table I). These dwelled places are situated 1-7 km from Hungarian and Romanian borders. Visual inspections of corn plantations found no larvae of Western Corn Rootworm. The results of all conducted tests were recorded in a special journal.
Western Corn Rootworm was detected in the Laboratory of Quarantine in Zakarpattya zones. The identification of Diabrotica virgifera virgifera Le Conte was confirmed by Central Scientific Laboratory of Quarantine.

Scientific institutions continue their researches. So, Ukrainian Scientific Research Station of Plant Quarantine synthesized 8 analogues of natural genital liquids.
Some of them were installed along the perimeter with Romanian border in three regions of Ukraine. At the same time, thanks to friendly assistance of partners from Hungary, these liquids were used in the region with stable development of Diabrotica virgifera virgifera. The signs of effectiveness of different liquids as well as their modifications were defined and necessary results were attained. It'll be the basis of further improvement of their effectiveness and fitting to modern requirements.
At this point we'd like to underline that such co-operation helps to work out the system of control over development and distribution of adventive species on European territory more effectively.
Besides, scientific searching for the signs of corn plants resistance to Diabrotica virgifera virgifera also took place. According to this, Ukrainian Scientific Research Station of Plant Quarantine modified the device (published before by Dr. F.Bocza from Yugoslavia) for the identification of the maturity stage of corn root-system in the first half of vegetation. By means of this device we received data about resistance of root-system in different hybrids. This can be used in further approaches to selection and age of the seed of hybrids with strongly developed root-system.
So, in Ukraine the main directions of control over Diabrotica virgifera virgifera have been already identified.