Abstract:
The remanent effect of herbicides was studied by many foreign
researchers: Hurle 1980, Hime and coll. 1991, Wuerzer 1985. In Romania,
the largest number of experiments regarding the remanent effect of
herbicides based on atrazin and simazin upon various crops have been made
by dr. Șarpe and his collaborators. During the past 10 years, studies have
been also made regarding the remanent effect of dicamba and 2,4-D
herbicides upon various crops, namely maize, sunflower, sugar beet and flax
for linseed and linen.
The experiments regarding the remanent effect of Merlin Duo and
Gardoprim Plus Gold 500 SC are the first ones of this type and unique in
Romania ‒ being carried out in the Flood Plain of the Danube river. In
the years 2007-2008, experiments were performed at the Agrofam-Holding
Agricultural Company from Fetesti, Ialomita County, situated in an area with
alluvial soil specific to the aforementioned Flood Plain, the aim being to
study the remanent effect of the herbicides Merlin Duo, which contains 37,5
g/l isoxaflutol + 375 g/l terbuthylazin, Gardoprim Plus Gold 500 SC, which
contains 312,5 g/l S-metalochlor + 187,5 g /l terbuthylazin.
The Merlin Duo herbicide was applied in doses of 3 and 6 litres per
hectare, and the Gardoprim Plus Gold 500 SC was applied in doses of 5 and
10 litres per hectare. Both herbicides were applied in July, after the wheat
was harvested. After application, the herbicides were incorporated by disking
15-18 cm deep into the ground. In the spring of 2008, before sunflower was
sowed, the land was laboured 10 cm deep by the disk and the combinator.
Based on the observations made every month during the vegetation stage and
on the yield obtained, the authors have reached the conclusion that the
Merlin Duo and Gardoprim Plus Gold 500 SC did not present any remanent
effects on the alluvial soil from the Flood Plain of the Danube river.
