Dinamika populacije zlatice kukuruza (Diabrotica virgifera virgifera Le Conte) u Bosni i Hercegovini
2010
Nedžad Karić | Husnija Festić
Diabrotica virgifera virgifera is a corn pest that has been present in Bosnia and Herzegovina since 1996. Following its first appearance, it very quickly infested the main corn producing areas in our country. The population size has been increasing from year to year, particularly in the areas under corn monoculture. In some years, it reached critical values that caused economic damage. The only limiting factor in our conditions are changing climatic conditions that significantly affect the number and other parameters of population dynamics. Thus this research is important from both scientific and practical aspects. The survey was conducted in infested areas under intensive corn production on a total of 30 sites. The aim was to investigate the population dynamics of the Western corn rootworm under the climatic conditions of Bosnia and Herzegovina. The study included the emergence and dynamics of adults, population numbers and sexual index as the main indicators of dynamic changes in insect populations. The research was conducted between 2003 and 2005. Yellow sticky traps and entomological cages were used to trap insects. The traps and cages were installed in early June, and the last check was conducted on the 30th of October. The results indicate that climatic factors have the leading influence on all studied parameters. There are major differences in population numbers between years on all studied sites. The time of emergence of adults differed significantly depending on the year of research. Egg-laying period did not overlap in all years. The period of adult activity differed by up to two months. In addition, differences were found in the sexual index caused by different climatic factors. Many other factors affecting population dynamics were noted, which need to be explored in detail under production conditions of Bosnia and Herzegovina.
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