Two field experiments were carried out in 1990/1991 and
1991/1992 seasons at the Research and Experimental Station,
Faculty of Agriculture, Moshtohor, Qalyoubia. The aim of
this investigation was to study the effect of using atra—
aine metribuzin and Primextra herbicides either single or
ir combination at different doses on weed control and yield
and its components of faba bean.
All weed control treatments significantly decreased
fresh and dry weights of weeds during the two experimental
seasons compared with unweeded check. Weed control was
improved with hand hoeing and herbicidal mixtures than
single herbicides in both seasons
Herbicidal treatments significantly decreased the estab
lishment of faba bean seedlings, specially at high rates
compared with hand hoeing or unweeded check during the two
seasons. Hand hoeing surpassed other treatments in increas
ing number as well as fresh and dry weights of branches,
leaves and pods/plant in 1990/1991 season. The signifi
cantly highest on number, fresh and dry weight of pods/plant
in 1991/1992 season, was obtained by hand hoeing and mixture
of atrazine + Primextra at the high rate (complete rates of
each)
The highest increases in yield component values were
obtained with hand hoeing followed by atrazine ÷ Prirnextra
(at 50 % rates of each) in the first season, and with atra—
zine + metrjbuzin (at 50 % rates of each) in the second sea
son, The heaviest 100—seed weight was recorded with atra—
aine alone or in combination with Primextra (at 50 % rates
of each) The highest seed yield/fed. was obtained with
hand hoeing followed by metribuzin tri 1990/1991 season and
with Primextra + metribuzin (complete rates of each) fol—
towed by mel-ribuzin in 1991/1992 season Low rates of
herbicidal mixtures were genera.)y better as single
|
