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2012, vol. 27, br. 1, str. 69-75
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Selektivnost nekih herbicida prema ježevici (Dactylis glomerata L.) gajenoj za proizvodnju semena
Selectivity of some herbicides to cocksfoot (Dactylis glomerata L.), grown for seed production
Sažetak
U periodu 2008-2010. godine ispitivana je selektivnost nekih herbicida prema gajenoj ježevici (Dactylis glomerata L.) i njihov uticaj na produkciju semena. Ogled je postavljen na eksperimentalnim površinama Institute of Forage Crops, Plovdiv, na blago ispranom černozemu. Na osnovu izvedenih istraživanja konstatovano je sledeće: herbicidi Arat (550 g/l dikamba + 250 g/l tritosulfuron) primenjen u količini 100 ml/ha, Korida 75 VDG (750 g/kg tribenuron- metil) - 15 g/ha, Cambio SL (320 g/l bentazon + 90 g/l dikamba) - 1250 ml/ha i Grasp 25SK (250 g/l tralkoksidim) + Atplus u količini 1000 + 1000 ml/ha, primenjeni u fazi 2-4 lista u godini zasnivanja ježevice i do početka vlatanja u godini proizvodnje semena, pokazali su visok stepen selektivnosti prema ježevici. Herbicid Topik 080EK (80 g/l klodinofop-propargil + antidot) u količini primene 300 ml/ ha, izazvao je fototoksične efekte na D. glomerata koji su se odrazili na smanjenu produkciju semena i nižu produktivnost suve biomase.
Abstract
The study was conducted to determine selectivity of some herbicides to cocksfoot (Dactylis glomerata L.), and their influence on the seed production, during the years 2008- 2010. The trial was set on the experimental field of the Institute of Forage Crops - Pleven, on slightly leached chernozem. As a result of the research the following was found: herbicides Arat (500 g/l dicamba + 250 g/l tritosulfuron) at the dose of 100 ml/ha, Korida 75 VDG (750 g/kg tribenuron-methyl) - 15 g/ha and Cambio SL (320 g/l bentazon + 90 g/l dicamba) - 1250 ml/ha and Grasp 25SK (250 g/l tralkoxyidim) + Atplus at rate of 1000 + 1000 ml/ha had high selectivity to cocksfoot, applied at 2-4 leaf stage during establishing year of the stand, and until the stage of the beginning of shooting up in seed production year. Herbicide Topik 080EK (80 g/l clodinofop - propargyl + antidote) at rate of 300 ml/ha, showed phytotoxic effect to D. glomerata and caused the reduction of seed and dry biomass productivity.
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