Common ragweed (Ambrosia artemisiifolia L.) in maize, soybean and stubbles in Obrenovac area [Serbia] | Prisustvo ambrozije (Ambrosia artemisiifolia L.) u kukuruzu, soji i strništu na teritoriji Obrenovca [Srbija]
2010
Stanković-Kalezić, R., Institut za pesticide i zaštitu životne sredine, Beograd (Serbia) | Jovanović, V., Institut za pesticide i zaštitu životne sredine, Beograd (Serbia) | Janjić, V., Institut za pesticide i zaštitu životne sredine, Beograd (Serbia) | Radivojević, Lj., Institut za pesticide i zaštitu životne sredine, Beograd (Serbia) | Šantrić, Lj., Institut za pesticide i zaštitu životne sredine, Beograd (Serbia) | Gajić-Umiljendić, J., Institut za pesticide i zaštitu životne sredine, Beograd (Serbia)
Obrenovac Municipality is a part of the Belgrade City area some 29 km away from its inner parts and has a population of some 71,000. It is situated in the central Lower Kolubara Basin and the valleys of the Kolubara and Tamnava rivers, it borders on the Šumadija region to the east and south, on Mt. Pocerina to the west, and the Sava river to the north. The municipality has an area of 410 square km that includes 23 local communes. Field research of the presence of common ragweed in the territory of Obrenovac was conducted from July through October 2009. All of the 410 square km area was investigated. Sites with common ragweed were identified using a GPS device. A partially modified Braun-Blanquet (1965) method was used to determine common ragweed distribution. The presence of common ragweed in different habitats (agricultural area, urban greenery zones and ruderal habitats) was found to vary. The species poses no significant problem in cultivated greenery zones of the urban part of Obrenovac and central parts of its suburban areas. However, common ragweed was found to grow at high density over a large area of agricultural fields. Different degrees of its presence depend on the type of soil utilization, i.e. crops grown in the fields (wheat, maize and soybean), their sowing time, agricultural practices and chemical substances applied. Regarding agricultural areas, stubbles were the most highly represented type of habitat with a total of 415 relieves, which is 92% of the overall area infested with common ragweed (531 ha). It is an indication of the size of its seed bank in soil accumulated after harvests, when fields are free of their plant cover, air temperature is still high and soil sufficiently moist, which provides perfect conditions for fast germination and growth of common ragweed plants.
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