A contribution to studies of the ruderal vegetation of Southern Srem, Serbia

Floristic research investigating the presence and phytocoenological differentiation of ruderal vegetation, and how it is conditioned structurally and anthropogenically, was undertaken over a period of several years (2007-10) in the south Srem region. The ruderal flora of the research area comprised 249 plants categorized into 63 families, of which the most frequent were: Asteraceae (36), Poaceae (29), Fabaceae (18), Lamiaceae (15), Polygonaceae (15), Brassicaceae (11) and Rosaceae (11). Three ruderal communities are analyzed in this work: Asclepietum syriacae Kojić et al., 2004, as well as Chenopodio-Ambrosietum artemisiifoliae ass. nova and Amorpho-Typhaetum ass. nova, which are described for the first time. It was established that the level of moisture at the habitat, anthropogenic factors, and the immediate proximity to cultivated areas had the most pronounced effect on the differentiation of the researched vegetation.Projekat ministarstva br. 17301

Adventive and invasive weed species in Serbia

Invasive alien species are taxa that are deliberately or incidentally dispersed from their natural habitats and introduced into new ecosystems, where they show ability to out compete native species and occupy new habitats. The ecology of invasion by animals and plants has been analyzed in numerous articles. As more powerful competitors, introduced taxa may threaten the existence of native (in some cases rare or endemic) species. Moreover, introduction of new species may cause an introduction of organisms that are pathogenic to natives, but not to the introduced species. In such cases, the pathogenic disease may cause significant reduction in the biodiversity of native habitats. The problem of introduced species has been emphasized in recent times because of the globalization of markets, increased trade, travel and tourism. Considering such unfavorable trends, invasive alien species are recognized as one of the major threats to biodiversity (Convention on Biological Diversity). We analyzed effects of invasive alien species on agricultural communities, and surveyed such species in agricultural, ruderal and aquatic ecosystems in Serbia. We analyzed strategies that can be employed to prevent invasive spread of alien species.nul

Biological Spectrum of Weed Flora and Vegetation of Raspberry Plantings in Serbia

A timely and proper weed control imposes the need to identify the floristic composition and biology of weed community in raspberry plantings. A survey was conducted in more than 40 raspberry plantings (southwest part of Serbia) and about 85 weed species (68 broadleaf and 17 grass species) were registered. At the study area, the predominant grass weed species according to abundance and cover values were: Panicum crus-galli L., Setaria glauca (L.) P. B., Setaria viridis (L.) P. B. and Digitaria sanguinalis Scop.; and broadleaf species: Amaranthus retroflexus L., Amaranthus hybridus L., Chenopodium polyspermum L., Erigeron canadensis L., Galinsoga parviflora Cav., Glechoma hederacea L., Polygonum lapathifolium L., Convolvulus arvensis L., Calystegia sepium R. Br. and Rubus caesius L. In biological spectra of weed flora and weed vegetation dominate annual (therophytes, 26) and perennial species from hemicriptophytes life form (25)

Weed Control in Raspberry and Blackberry Plantings by Herbicides

Weed control in rapsberry and blackberry plantings during the 2007 vegetation season was evaluated using three herbicides: Casoron G (a.i. dichlobenil 67.5 g/kg) with application rates of 60 and 80 kg/ha, foliar treatments of Galop (a.i. paraquat 200 g/L) at 4.0 L/ha and Bonaca EC (a/o/fluroxypyr-meptyl 360 g/L) at 0.8 and 1.0 L/ha. Bonaca (1 L/ha) showed the best efficacy against all broad leaf weed species and Casoron G (80 kg/ha) against all grass weed species. None of the combinations showed sufficient efficacy ( gt 95%) against Cynodon dactylon or Sorghum halepense

Weed Control in Raspberry and Blackberry Plantings by Herbicides

Weed control in rapsberry and blackberry plantings during the 2007 vegetation season was evaluated using three herbicides: Casoron G (a.i. dichlobenil 67.5 g/kg) with application rates of 60 and 80 kg/ha, foliar treatments of Galop (a.i. paraquat 200 g/L) at 4.0 L/ha and Bonaca EC (a/o/fluroxypyr-meptyl 360 g/L) at 0.8 and 1.0 L/ha. Bonaca (1 L/ha) showed the best efficacy against all broad leaf weed species and Casoron G (80 kg/ha) against all grass weed species. None of the combinations showed sufficient efficacy ( gt 95%) against Cynodon dactylon or Sorghum halepense