Spreading, bioecological caracteristics [i.e. characteristics] and suuppression [i.e. suppression] of Iva (Iva xanthifolia Nutt.). [Doctoral dissertation] | Rasprostranjenost, bioekoloske karakteritike i suzbijanje ive (Iva xanthifolia Nutt.). Doktorska disertacija
2007
Marisavljevic, D.
Giant sumpweed (Iva xanthifolia Nutt.) is newly introduced, invasive weed from Asteracea family, appreared in Vojvodina (Serbia) 60-th years in last century. This weed is mostly present on ruderal sites, but in last ten years it infested field crops as well. In the aim of introducing characteristics of this plant we examinate: spreading Giant sumpweed in Vojvodina region, characteristics of seed and conditions of germinating, morphometric characteritics, chemical control possibilities, and amount of nutrition elements nitrogen, phosphorus and potassium which this weed taken from soil. According to investigations provided between 2002-2006, Giant sumpweed was recorded in Vojvodina on 43 localities. Giant sumpweed is very well adapted in our habitats, in two basic seed fractions bigger part is taken by larger seed (which has better rate of emergence), has continental temperature ratio for seed emerging (from 5 to 20 deg C). In our sites Giant sumpweed have higher height than plants from original habitat, complete life cycle and offspring. In sugar beet and soybean Giant sumpweed can be well controlled with soil and foliar herbicides. Total amount N, P and K in air dried plant material is N 1.22-1.64%, P 0.39-0.51% and K 0.22-0.29%, and according that amount of this elements, which Giant sumpweed takes from soil, is multiplied higher than usual amount of fertilizer, and that suggested soil impovershment caused by this weed.
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