Kordulian R. Monitoring and forecast of American white butterfly (Hyphantria сunea Drury) and western corn beetle (Diabrotica virgifera virgifera Le Conte) in the western steppes of Ukraine

Improved methods of monitoring American white butterfly (Hyphantria сunea Drury) and western corn beetle (Diabrotica virgifera virgifera Le Conte). For the American white butterfly monitoring appropriate to the primary in June, while the emergence of mass breeding caterpillars third and fifth centuries. After 5-7 days to conduct a second monitoring. Under these conditions, the detection rate of the caterpillars in private households is 80 %. Start monitoring nests pest detection is important to the second generation in late July to early August. Re-examination is carried out in 5-7 days after the previous one. Monitoring corn beetle (Diabrotica virgifera virgifera Le Conte) should be carried out using pheromone traps by conventional methods. Control seasonal adult fly is advisable to start visual inspection of the corn phase before flowering, and the number of larvae assessment of their impact on the physiological condition of crops determined by conventional methods specified by us recommendations. Key words: American white butterfly, western corn rootworm, monitor, forecast distribution, plant quarantine, mapping.