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The effect of eggplant rootstock on yield and quality characteristics of tomato fruit have been studied in a three subsequent cropping years at the Faculty of Agriculture in Novi Sad, Serbia. Tomato cultivar ‘Jeremy’ was used as scion and as an ungrafted control, and as rootstock eggplant cultivar ‘Madona’ and Lycopersicon esculentum ssp. subspontaneum var. cerasiformae. In the case of Lycopersicon esculentum ssp. subspontaneum var. cerasiformae as a rootstock high percentage (82%) of successful grafting was observed, while survival rate of treatment ‘Jeremy’ as a scion and eggplant ‘Madona’ as a rootstock was only 68%. A negative effect of grafting on the eggplant rootstock was observed regarding fruit yield per plant, number of fruits per plant and total yield. These parameters were significantly higher in the ungrafted treatments and in the treatment Lycopersicon esculentum ssp. subspontaneum var. cerasiformae as a rootstock. Organic acid and lycopene content was significantly higher when the eggplant ‘Madona’ was used as a rootstock. Total sugar and vitamin C content was highest in the treatment Lycopersicon esculentum ssp. subspontaneum var. cerasiformae as a rootstock.
In the paper are presented results of three years studies performed in the period 2008–2010 on effects of cultural practices in stands of Panico-Galinsogetum Tx. et Beck. 1942. association in conventional potato production on the experimental plots in the vicinity of Becej (Northern Serbia). Composition of association Panico-Galinsogetum in experimental control variant builds 31 weed species. From Panico-Galinsogetum community, in the variant with one cultivation (with earthing up) without herbicide applying was found 22 weed species, and at the variant with two cultivation without herbicide 17 weed species, respectively. Herbicide treatments of potato crops as well as cultivation led to significant impoverishment of the weed flora, i.e., reduction in number of weed species, their coverage value, as well as the degree of presence in potato crop. Due to reduction of weed infestation, in variants untreated by herbicides, by application of two cultivations, achieved potato yield was for 8% higher in comparison to the variant with one cultivation. In variants treated by herbicides, potato yield was for 32% higher in relation to the yield on untreated experimental variants. The average number of tubers per plant achieved in variants treated by herbicides was for 40% higher in comparison to the number of tubers in untreated variants. In both cases, in comparison to control variant, cultivation resulted in significantly higher number of tubers per plant.
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