Chemical control of perennial and annual weeds in herbicide resistant soybean crops.
In Romania, the first tests with Roundup Ready on soybean crops were performed in 1998, on 2 soil types: a) at Teleorman Station on chernozem containing 3.5% humus, 4.5% clay b) at Brăila Station placed in Danube Meadow on alluvial soil containing 3.90% humus and 46% clay. In every locality cultivated soybean cultivar S.2254 was resistant to glyphosate. During the three years of experiments (1998-2000) the crop of soybean was infested with various species of weeds (both annual and perennial) of which the most important are: Sorghum halepense (60-80%), Echinochloa crus-galli, Setaria glauca, Amaranthus retroflexus, Solarium nigrum, Yanthium italicum, Abutilon theoprasthi, Sinapis arvensis, Datum stramonium, Polygonum persicaria, Calystegia sepium, Cirsium arvense. In 3 years of experience the best weed control and the highest soybean production were obtained in the variants treated 2 times postemergent with Roundup Ready at a dose of 3 + 3 l/ha. Similar results were also obtained in the farms of the Academy of Agricultural Forestry Sciences, where GMO soybean was cultivated on 1500 hectares.
Sarpe
N
N
Academy of Agricultural and Forestry Sciences, 61, Blvd. Marasti, Bucharest, Romania.
Roibu
C
C
Negrila
E
E
Bodescu
F
F
Fuia
S
S
Popa
C
C
Beraru
C
C
D004305:Dose-Response Relationship, Drug; D004351:Drug Resistance / Q000235:genetics; D005998:Glycine / Q000031:analogs & derivatives* / Q000494:pharmacology*; D006540:Herbicides / Q000494:pharmacology*; D010944:Plants / Q000187:drug effects*; D030821:Plants, Genetically Modified / Q000187:drug effects* / Q000502:physiology; D011897:Random Allocation; D013025:Glycine max / Q000187:drug effects* / Q000235:genetics / Q000502:physiology; D000097797:Glyphosate
D005998:Glycine; D006540:Herbicides; D000097797:Glyphosate