Abstract
Field studies were conducted in Clinton, NC in 2007 and 2009 to determine sweetpotato crop response and Palmer amaranth control with metribuzin and oryzalin. Treatments consisted of 140 and 202 g ai ha −1 metribuzin applied immediately after transplanting [0 wk after transplanting (WAP)] or 2 WAP, 560 and 1121 g ha −1 oryzalin 0 WAP, and tank mixes of metribuzin (140 or 202 g ha −1 ) and oryzalin (560 or 1,121 g ha −1 ) 0 WAP. At 2 WAP, metribuzin alone applied 0 WAP resulted in greater crop injury (33%) than oryzalin alone (1%), and the tank mix of metribuzin plus oryzalin resulted in greater crop injury (49%) than either herbicide applied alone. Greater crop injury occurred when metribuzin was applied at 202 g ha −1 (54%) than 140 g ha −1 (34%). Levels of injury were similar at 4 WAP (34, 8, and 52% for metribuzin, oryzalin, and the tank mix, respectively). At 4 WAP, injury from metribuzin was greater when it was applied 0 WAP (34%) compared to 2 WAP (18%). By 10 WAP, injury from metribuzin applied at 2 WAP was only 4%. At 4 WAP, Palmer amaranth control was excellent for all treatments and ≥98%. At 10 WAP, control among treatments ranged from 77% to 85%. Palmer amaranth control provided by metribuzin was similar for applications made 0 WAP (78%) and 2 WAP (77%). Oryzalin alone provided similar control (85%) to metribuzin alone 0 WAP, but greater control than the tank mix (77%). Neither metribuzin nor oryzalin rate differed in weed control provided at 10 WAP. Oryzalin 0 WAP and metribuzin 2 WAP provided no. 1 sweetpotato yields equivalent to the hand-weeded check. No. 1 yields of all other treatments were less than the hand-weeded check but greater than the weedy check.
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Claims 18
Claim · model-written summary
At 2 WAP, metribuzin caused 33% injury versus 1% for oryzalin.
- Taxon
- Sweetpotato
_Flower.jpg?width=60)
Ipomoea batatast0 - Treatment
- metribuzin alone applied 0 WAPe0
- Outcome
- crop injurye0
- Direction
- greatere0
- Value
- 33%e0
- Qualifier
- 1%e0
- Comparator
- oryzalin alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“metribuzin alone applied 0 WAP resulted in greater crop injury (33%) than oryzalin alone (1%)”
t0“Sweetpotato”
Claim · model-written summary
The metribuzin and oryzalin tank mix caused 49% injury, more than either alone.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- tank mix of metribuzin plus oryzaline0
- Outcome
- crop injurye0
- Direction
- greatere0
- Value
- 49%e0
- Comparator
- either herbicide applied alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the tank mix of metribuzin plus oryzalin resulted in greater crop injury (49%) than either herbicide applied alone.”
t0“Sweetpotato”
Claim · model-written summary
The 202 g rate of metribuzin caused 54% injury versus 34% at 140 g.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- metribuzin was applied at 202 g ha −1e0
- Outcome
- crop injurye0
- Direction
- Greatere0
- Value
- 54%e0
- Qualifier
- 34%e0
- Comparator
- 140 g ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greater crop injury occurred when metribuzin was applied at 202 g ha −1 (54%) than 140 g ha −1 (34%).”
t0“Sweetpotato”
Claim · model-written summary
At 4 WAP, metribuzin injury was 34%.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- metribuzine0
- Outcome
- injurye0
- Value
- 34e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Levels of injury were similar at 4 WAP (34, 8, and 52% for metribuzin, oryzalin, and the tank mix, respectively).”
t0“Sweetpotato”
Claim · model-written summary
At 4 WAP, oryzalin injury was 8%.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- oryzaline0
- Outcome
- injurye0
- Value
- 8e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Levels of injury were similar at 4 WAP (34, 8, and 52% for metribuzin, oryzalin, and the tank mix, respectively).”
t0“Sweetpotato”
Claim · model-written summary
At 4 WAP, tank-mix injury was 52%.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- the tank mixe0
- Outcome
- injurye0
- Value
- 52%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Levels of injury were similar at 4 WAP (34, 8, and 52% for metribuzin, oryzalin, and the tank mix, respectively).”
t0“Sweetpotato”
Claim · model-written summary
Metribuzin at transplanting caused 34% injury versus 18% at 2 WAP.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- metribuzin was greater when it was applied 0 WAPe0
- Outcome
- injurye0
- Direction
- greatere0
- Value
- 34%e0
- Qualifier
- 18%e0
- Comparator
- 2 WAPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“injury from metribuzin was greater when it was applied 0 WAP (34%) compared to 2 WAP (18%).”
t0“Sweetpotato”
Claim · model-written summary
By 10 WAP, injury from metribuzin applied at 2 WAP was 4%.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- metribuzin applied at 2 WAPe0
- Outcome
- injurye0
- Value
- 4%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By 10 WAP, injury from metribuzin applied at 2 WAP was only 4%.”
t0“Sweetpotato”
Claim · model-written summary
All treatments controlled Palmer amaranth by at least 98% at 4 WAP.
- Taxon
- SweetpotatoIpomoea batatast0
- Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranth controle0
- Value
- ≥98%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 4 WAP, Palmer amaranth control was excellent for all treatments and ≥98%.”
t0“Sweetpotato”
Claim · model-written summary
At 10 WAP, treatment control of Palmer amaranth ranged from 77% to 85%.
- Taxon
- SweetpotatoIpomoea batatast0
- Outcome
- control among treatmentse0
- Value
- 77% to 85%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 10 WAP, control among treatments ranged from 77% to 85%.”
t0“Sweetpotato”
Claim · model-written summary
Metribuzin at 0 and 2 WAP gave similar Palmer amaranth control, 78% and 77%.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- metribuzine0
- Interactor
- Palmer amaranthe0weed
- Outcome
- Palmer amaranth controle0
- Direction
- similare0
- Value
- 78%e0
- Qualifier
- 77%e0
- Comparator
- 2 WAPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Palmer amaranth control provided by metribuzin was similar for applications made 0 WAP (78%) and 2 WAP (77%).”
t0“Sweetpotato”
Claim · model-written summary
Oryzalin alone controlled Palmer amaranth similarly to metribuzin alone at transplanting.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- Oryzalin alonee0
- Outcome
- controle0
- Direction
- similare0
- Value
- 85%e0
- Comparator
- metribuzin alone 0 WAPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oryzalin alone provided similar control (85%) to metribuzin alone 0 WAP”
t0“Sweetpotato”
Claim · model-written summary
Oryzalin alone gave greater control than the tank mix.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- Oryzalin alonee0
- Outcome
- controle0
- Direction
- greatere0
- Value
- 77%e0
- Comparator
- tank mixe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oryzalin alone provided similar control (85%) to metribuzin alone 0 WAP, but greater control than the tank mix (77%).”
t0“Sweetpotato”
Claim · model-written summary
Neither metribuzin nor oryzalin rate differed in weed control at 10 WAP.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- metribuzin nor oryzalin ratee0
- Outcome
- weed controle0
- Direction
- differede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither metribuzin nor oryzalin rate differed in weed control provided at 10 WAP.”
t0“Sweetpotato”
Claim · model-written summary
Oryzalin at 0 WAP produced no. 1 yields equivalent to hand weeding.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- Oryzalin 0 WAPe0
- Outcome
- no. 1 sweetpotato yieldse0
- Direction
- equivalente0
- Comparator
- hand-weeded checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oryzalin 0 WAP and metribuzin 2 WAP provided no. 1 sweetpotato yields equivalent to the hand-weeded check.”
Claim · model-written summary
Metribuzin at 2 WAP produced no. 1 yields equivalent to hand weeding.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- metribuzin 2 WAPe0
- Outcome
- no. 1 sweetpotato yieldse0
- Direction
- equivalente0
- Comparator
- hand-weeded checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oryzalin 0 WAP and metribuzin 2 WAP provided no. 1 sweetpotato yields equivalent to the hand-weeded check.”
Claim · model-written summary
All other treatments produced no. 1 yields below hand weeding.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- all other treatmentse0
- Outcome
- No. 1 yieldse0
- Direction
- less thane0
- Comparator
- hand-weeded checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No. 1 yields of all other treatments were less than the hand-weeded check but greater than the weedy check.”
t0“Sweetpotato”
Claim · model-written summary
All other treatments produced no. 1 yields above the weedy check.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- all other treatmentse0
- Outcome
- No. 1 yieldse0
- Direction
- greater thane0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No. 1 yields of all other treatments were less than the hand-weeded check but greater than the weedy check.”
t0“Sweetpotato”
The same questions in other papers
metribuzin · crop injury · Ipomoea batatas (sweet potato)Results agree
3 papers in the same direction as this paper
- negative
- negative
- no effect
transplanting · crop injury · Ipomoea batatas (sweet potato)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- negative
- negative
- positive
5 papers more in this group
See all 9 papers →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.