Effect of some herbicides on the productivity of common dry bean (Phaseolus vulgaris L.)
Zornitsa Petrova • Ivan Kiryakov • Dimitar Genchev
Dobrudzha Agricultural Institute - General Toshevo, 9521, General Toshevo, Bulgaria
Резюме
The investigations were carried out during 2016–2017 at Dobrudzha Agricultural
Institute – General Toshevo (DAI). The aim of this investigation was to determine
the effect of the treatment with herbicides in varieties common dry bean on
the productivity. The following herbicides combinations were used: 1 variant:
petoxamide (200 ml)+linuron (300 ml)+cikloksidim (200 ml); 2 variant: petoxamide
(200 ml)+bentazon (200 ml)+cikloksidim (200 ml); 3 variant: petoxamide
(200 ml)+bentazon (200 ml)+ cikloksidim (200 ml); 4 variant: dimetenamid-
P+pendimetalin (400 ml)+linuron (300 ml)+ cikloksidim (200 ml); 5 variant:
dimetenamid-P+pendimetalin (400 ml)+bentazon (200 ml)+cikloksadim (200 ml);
6 variant: dimetenamid-P+pendimetalin (400 ml)+bentazon (200 ml)+cikloksidim
(200 ml). The vegetation herbicides were applied separate at variant 2 and 5 but
at variant 3 and 6 – combined. The herbicides were applied at stage 01 (BBCH),
and bentazon (200 ml) and cikloksidim (200 ml) at stage 12 (BBCH) on three
varieties common dry bean “GTB-Usrtem“, “GTB-Blijan“ and “GTB-Elixir“. The
herbicide effect was determined by the quantitative weight method and evaluated
by the EWRS scale. These were the followed parameters: productivity (kg/da),
number of pods per plant, number of grains per plant, weight of grain per plant (g),
weight of 1000 grains (g). Variety “GTB-Elixir“ has the highest productivity of the
three varieties studied in all tested variants. Herbicide combinations for variant 5.
Dimethenamid-P+pendimetalin-400 ml/da+bentazon-200 ml/da+cikloksidim-200ml/da-separate application and variant 4. Dimethenamid-P+pendimetalin-400 ml/
da+linuron-300 ml/da+cikloksidim-200 ml/da achieved the highest productivity,
respectively 236.9 kg /da and 209.1 kg /da, average over the investigated period.
The productivity of the tested herbicides in varieties “GTB-Ustrem“ and “GTBBlijan“
is much lower. The correlation between most biometric parameters is
positive and strongly expressed in the studied varieties. Negative and weakly
correlated relationships between some biometric parameters have been established
of variety “GTB-Ustrem“.
Key words: Common dry bean, Herbicides, Weeds, Productivity, Structural
elements of productivity
