Dependence of potato yield on weed infestation
2020
Barbaś, P. | Sawicka, B.
Results of the research were based on a field experiment carried out in 2007–2009 atthe Experimental Plant of the IHAR-PIB in Jadwisin, on podzolic soil with a granulometriccomposition of loamy sand. The experiment was established by means of a random sub-blockmethod in a dependent split-plot pattern, in triplicate. The first order factor were the potatocultivars: ‘Irga’ and ‘Fianna’, the second order factor were the methods of weeds regulation:1) control − without chemical protection; 2) extensive mechanical treatments (every 2 weeks)from planting to closing the rows; 3) Sencor 70 WG – 1 kg ha-1 before potato emergence;4) Sencor 70 WG – 1 kg ha-1 + Titus 25 WG – 40 g ha-1 + Trend 90 EC – 0.1% before potatoemergence; 5) Sencor 70 WG – 0.5 kg ha-1after potato emergence; 6) Sencor 70 WG –0.3 kg ha-1 + Titus 25 WG – 30 g ha-1 + Trend 90 EC – 0.1% after potato emergence; 7) Sencor70 WG – 0.3 kg ha-1 + Fusilade Forte 150 EC – 2 dm3 ha-1after potato emergence; 8) Sencor70 WG – 0.3 kg ha-1 + Apyros 75 WG 26.5 g ha-1 + Atpolan 80 SC – 1 dm3 ha-1after potatoemergence. The number, floristic compositions, fresh weight and dry matter of weeds weredetermined. A high, yield-protective effect of herbicides was obtained as a result of limitedcompetition of weeds. Mechanical care contributed to the increase in the total potato yield by36.2%, and the marketable yield by 45.7%, as compared to the control object.
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