Abstract
In southern Chile, glyphosate is often complemented with broadleaf herbicides to improve the control of weeds like Taraxacum officinale Weber ex F. H. Wigg., Hypochaeris radicata L., Plantago lanceolata L., Raphanus raphanistrum L., Veronica persica Poiret , and Trifolium repens L. prior to sowing lupin or canola. The broadleaf herbicides may persist in the soil for unpredictable periods, depending on soil and climatic conditions. Narrow-leafed lupin ( Lupinus angustifolius ) cv. Gungurru and canola (Brassica napus) cv. Coronet were sown 1, 8, 15, and 30 days after spraying herbicides. Treatments were (A) glyphosate alone (1080 g/ha), glyphosate in tank-mixture with (B) fluroxypyr (100 g/ha), (C) 2,4-D ester (350 g/ha), and (D) metsulfuron (3 g/ha) + picloram (24 g/ha), all with 200 L/ha of water. The soil was a silty loam andisol with 15.5% organic matter and pH 5.9. The plots (RCB design with 3 replications) were maintained weed-free. Plant stand (plants per square meter) was recorded at 21 and 31 days, plant height at 31 days, and aboveground and belowground dry biomass was measured 63 days after sowing. Compared to glyphosate alone, treatments C and D significantly reduced plant height, aboveground and belowground dry biomass of lupins sown after 1 day. Only treatment D maintained that harmful effect on lupins sown 8, 15, and 30 days after herbicide spraying. Canola was less affected than lupin, but treatment D significantly reduced belowground and total dry biomass, compared to unaided glyphosate. Based on these results, the use of metsulfuron + picloram tank mixed with glyphosate in pre-seeding applications should be avoided.
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Claims 6
Claim · model-written summary
Glyphosate with 2,4-D ester significantly reduced height and aboveground and belowground dry biomass of lupins sown after one day.
- Treatment
- 2,4-D estere1
- Outcome
- plant height, aboveground and belowground dry biomasse0
- Direction
- reducede0
- Qualifier
- sown after 1 daye0
- Comparator
- glyphosate alonee0
LupinusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to glyphosate alone, treatments C and D significantly reduced plant height, aboveground and belowground dry biomass of lupins sown after 1 day”
e1“Treatments were (A) glyphosate alone (1080 g/ha), glyphosate in tank-mixture with (B) fluroxypyr (100 g/ha), (C) 2,4-D ester (350 g/ha), and (D) metsulfuron (3 g/ha) + picloram (24 g/ha), all with 200 L/ha of water”
Claim · model-written summary
Glyphosate with metsulfuron and picloram significantly reduced height and aboveground and belowground dry biomass of lupins sown after one day.
- Treatment
- metsulfuron (3 g/ha) + picloram (24 g/ha)e1
- Outcome
- plant height, aboveground and belowground dry biomasse0
- Direction
- reducede0
- Qualifier
- sown after 1 daye0
- Comparator
- glyphosate alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to glyphosate alone, treatments C and D significantly reduced plant height, aboveground and belowground dry biomass of lupins sown after 1 day”
e1“Treatments were (A) glyphosate alone (1080 g/ha), glyphosate in tank-mixture with (B) fluroxypyr (100 g/ha), (C) 2,4-D ester (350 g/ha), and (D) metsulfuron (3 g/ha) + picloram (24 g/ha), all with 200 L/ha of water”
Claim · model-written summary
The harmful effect of treatment D on lupins persisted at sowing intervals of 8, 15, and 30 days.
- Treatment
- metsulfuron (3 g/ha) + picloram (24 g/ha)e1
- Outcome
- harmful effect on lupinse0
- Direction
- harmfule0
- Qualifier
- 8, 15, and 30 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only treatment D maintained that harmful effect on lupins sown 8, 15, and 30 days after herbicide spraying”
e1“Treatments were (A) glyphosate alone (1080 g/ha), glyphosate in tank-mixture with (B) fluroxypyr (100 g/ha), (C) 2,4-D ester (350 g/ha), and (D) metsulfuron (3 g/ha) + picloram (24 g/ha), all with 200 L/ha of water”
Claim · model-written summary
Canola was less affected than lupin by the herbicide treatments.
- Taxon
- Canola
.jpg?width=60)
Brassica napus var. napuse0 - Outcome
- affectede0
- Direction
- lesse0
- Comparator
- lupine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Canola was less affected than lupin”
Claim · model-written summary
Treatment D significantly reduced belowground and total dry biomass in canola versus glyphosate alone.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- metsulfuron (3 g/ha) + picloram (24 g/ha)e1
- Outcome
- belowground and total dry biomasse0
- Direction
- reducede0
- Comparator
- unaided glyphosatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment D significantly reduced belowground and total dry biomass, compared to unaided glyphosate”
t0“Canola was less affected than lupin”
e1“Treatments were (A) glyphosate alone (1080 g/ha), glyphosate in tank-mixture with (B) fluroxypyr (100 g/ha), (C) 2,4-D ester (350 g/ha), and (D) metsulfuron (3 g/ha) + picloram (24 g/ha), all with 200 L/ha of water”
Claim · model-written summary
The authors recommend avoiding pre-seeding glyphosate mixtures with metsulfuron and picloram.
- Outcome
- metsulfuron + picloram tank mixed with glyphosate in pre-seeding applications should be avoidede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of metsulfuron + picloram tank mixed with glyphosate in pre-seeding applications should be avoided”
t0“narrow-leafed lupin”
The same questions in other papers
metsulfuron methyl · growth · Brassica napus (oilseed rape)Positive and negative results
1 in the opposite direction
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.