Efficiency and selectivity of herbicides in common dry bean (Phaseolus vulgaris L.)
Zornitsa Petrova • Ivan Kiryakov • Dimitar Genchev
Dobrudzha Agricultural Institute - General Toshevo, 9521, General Toshevo
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 efficiency and selectivity of herbicides in varieties common dry
bean. 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. Regardless of the used cultivar, the herbicide
combination 1 variant: petoxamide (200 ml)+linuron (300 ml)+cikloksidim (200
ml); 2 variant: petoxamide (200 ml)+bentazon (200 ml)+cikloksidim (200 ml); 5
variant: dimetenamid-P+pendimetalin (400 ml)+ bentazon (200 ml)+cikloksidim
(200 ml) had highest efficiency (100%) on the annual grassy (green hides - Setatia viridis L. and cockspur - Echinochloa crus-galli L.) and broadleaved weeds (wild
mustard - Sinapis arvensis L., common amaranth - Amaranths retroflexus L., thornapple
- Datura stramonium L., rough cocklebur - Xanthium strumarium L., fathen
- Chenopodium album L. After application of the tested set of herbicides, no
symptoms of phytotoxity were observed at the investigated varieties from 7 to 56
days after their use.
Key words: Common dry bean, Herbicides, Weeds, Efficiency, Selectivity
