Analysis of Diabrotica virgifera le conte beetles invasion of maize crops in Podkarpackie region: based on pheromone and food trap catching in the 2006-2008.

摘要

Field studies were conducted in Poland, from 2006 to 2008, to analyse Diabrotica virgifera invasion of maize crops using 2 types of Csalomon beetle traps, i.e. pheromone (with a sexual attractant) and food (with a food attractant). Both types of traps were installed simultaneously in maize crops beginning from the second half of June. In the first year D. virgifera beetles appeared only in the locality Terliczka, whereas in remaining years they were recorded in all 3 localities. First beetles were caught from the first half of July to the first decade of August. Comparing 3 years of research, the earliest pest appearance was recorded on 12 July 2007 in Terliczka. Until the half of August, most beetles (males) were caught by pheromone traps. Only a few individuals were found in the food traps during this season. After the first half of August, the pheromone traps attracted only single males, while the number of beetles (mainly females) caught in the food traps considerably increased. Last beetles were usually observed at the end of September.