OBSERVATIONS REGARDING THE BIODIVERSITY OF ENTOMOFAUNA IN SOME COLZA CULTURES PUBLISHEDNela Tălmaciu, M. Tălmaciu, Monica Herea
Collection of material was made with entomological fillet on colza crops research institute belonging to the cultivation of potatoes and sugar beet for Brasov and its surroundings kidnapped "rapeseed cultivation". Were made a number of five scythes to the two variants, in June the following date: 2.06, 6.06, 16.06, 26.06 and 30.06.2008. The material thus collected was then cleaned of scrap plant then was kept in a solution in alcohol concentration of about 20%, where they were kept for a period of time. Following determination of material was present in material collected of species of insects helpful and harmful. In some situations, especially if coleopterelor determination was made to species level, in other cases the determination was made to family or genus, less to species. Finally there was a greater presence as a species are harmful to the order Coleoptera species Meligethes aeneus, Phyllotreta nemorum and Ceuthorrynchus assimilis. Fauna is especially useful order Hymenoptera with several families: Braconidae, Calcididae, Ichneumonidae and Formicidae. Fauna density useful, harmful and total / m², had different values depending on the variant and the time of collection. The variant trated rape cultivated percentage of useful fauna was 5.36% while the spontaneous variant kidnapped, the percentage of useful fauna was 16.98%.
treatment; pests; fauna useful