engleski

ECB (Ostrinia nubilalis) AND WCR (Diabrotica virgifera virgifera) IN EAST SLAVONIA (CROATIA)

European corn borer (Ostrinia nubilalis) is one of the most economic important corn pest on in Croatia. ECB is present every year with no such low intensity of attack and its control is not implemented. Attack of ECB was 59 % in the last eight years. In 1998 attack was 55 %, and in 1999, 68% on the territory of Slavonia. Some domestic varieties showed good results such as investigations of tolerant hybrids to ECB, but these investigations should be continued. Experiments of bilogical control were done by Biobit XL (Bacillus thuringiensis) too, and attack of ECB was decreased by 46%. The second pest Western corn rootworm (Diabrotica virgifera virgifera) was found in Croatia in 1995 in Bošnjaci village in east Slavonia. Since then, the pest has been present and spreaded every year. During 1998 and 1999 the investigation of this pest was carried out in the Osijek and Gunja area , close to the border with Jugoslavia where this pest was discovered in 1992 for the first time in Europe. Pheromone traps – CsalomonN and yelow stick trap were used for monitoring. The first adult was found in Osijek area on 3rd of July and the last one on 26th of September 1998. Majority of the pest was captured at the end of July and beginning of August. Adults per one trap were 87 average during the monitoring period at Osijek territory. The first adult was cought at Gunja locality on 8th of July and the last one on the 30th of September 1998. In 1999 the first adult was found on 29th of June and the last one on the 4th of October at the same locality. Pheromone traps were better and about 94 % adults was captured by these method compared to the yelow stick. During 1999 at Gunja locality 1376 adults were captured and calculated to the number of plants it amounted 0,59 imago per plant. The roots were compared too, but the number of larvae were not so significane. The injured simptoms on the corn plant were very rear. In Croatia this is the new corn pest and should be monitored in the east of our country to prevent their spreading to the west region.

Ostrinia nubilalis; Diabrotica virgifera virgifera; corn

nije evidentirano