Abstract
An experiment was conducted at two locations in 2003 and 2004 to determine the timing and rate of thifensulfuron that is safe to use on sweetpotato. Thifensulfuron was applied 1, 2, and 4 wk after transplanting (WAP) in 2003 and 4, 6, and 8 WAP in 2004. Within each timing, thifensulfuron treatments were 1.1, 2.1, 3.2, 4.3, and 8.5 g ai/ha plus a weed-free control. The 1 and 2 WAP timings of thifensulfuron reduced the yield of number 1 roots greater than 25%. The 4, 6, and 8 WAP timings had less than 15% reduction in yield, with the 6 WAP timing reducing number 1 roots and total yield 10% or less. When 4.3 g/ha of thifensulfuron was applied 4 WAP, total yield was reduced 13%. The 6 and 8 WAP timings had little yield reduction, with no rate response observed. Application of 4.3 g/ha of thifensulfuron at 6 WAP would allow for control of problematic weed species while limiting potential yield loss. Yield loss from a 4 WAP application of thifensulfuron may in fact be a delay in crop maturity that could be recovered if the sweetpotato harvest was delayed to allow for the optimal amount of number 1 grade roots to be produced.
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Claims 8
Claim · model-written summary
Applications one or two weeks after transplanting reduced number 1 root yield by more than 25%.
- Taxon
- sweetpotato
_Flower.jpg?width=60)
Ipomoea batatast0 - Treatment
- 1 and 2 WAP timings of thifensulfurone0
- Outcome
- yield of number 1 rootse0
- Direction
- reducede0
- Value
- greater than 25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“The 1 and 2 WAP timings of thifensulfuron reduced the yield of number 1 roots greater than 25%.”
t0“Sweetpotato”
Claim · model-written summary
Applications at four, six and eight weeks after transplanting reduced yield by less than 15%.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- 4, 6, and 8 WAP timingse0
- Outcome
- yielde0
- Direction
- reductione0
- Value
- less than 15%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 4, 6, and 8 WAP timings had less than 15% reduction in yield”
t0“Sweetpotato”
Claim · model-written summary
Six-week application reduced number 1 root yield by no more than 10%.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- 6 WAP timinge0
- Outcome
- number 1 rootse0
- Direction
- reducinge0
- Value
- 10% or lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the 6 WAP timing reducing number 1 roots and total yield 10% or less”
t0“Sweetpotato”
Claim · model-written summary
Six-week application reduced total yield by no more than 10%.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- 6 WAP timinge0
- Outcome
- total yielde0
- Direction
- reducinge0
- Value
- 10% or lesse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the 6 WAP timing reducing number 1 roots and total yield 10% or less”
t0“Sweetpotato”
Claim · model-written summary
Applying 4.3 g/ha thifensulfuron at four weeks reduced total yield 13%.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- 4.3 g/ha of thifensulfuron was applied 4 WAPe0
- Outcome
- total yielde0
- Direction
- reducede0
- Value
- 13%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When 4.3 g/ha of thifensulfuron was applied 4 WAP, total yield was reduced 13%.”
t0“Sweetpotato”
Claim · model-written summary
Six- and eight-week applications had little yield reduction and no observed rate response.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- 6 and 8 WAP timingse0
- Outcome
- little yield reduction, with no rate response observede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 6 and 8 WAP timings had little yield reduction, with no rate response observed.”
t0“Sweetpotato”
Claim · model-written summary
The authors recommend 4.3 g/ha thifensulfuron at six weeks to control weeds while limiting yield loss.
- Taxon
- sweetpotatoIpomoea batatast0
- Interactor
- weed speciese0weed
- Outcome
- Application of 4.3 g/ha of thifensulfuron at 6 WAPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 4.3 g/ha of thifensulfuron at 6 WAP would allow for control of problematic weed species while limiting potential yield loss.”
t0“Sweetpotato”
Claim · model-written summary
The authors suggest yield loss from four-week application may reflect delayed crop maturity recoverable by later harvest.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- 4 WAP application of thifensulfurone0
- Outcome
- delay in crop maturitye0
- Qualifier
- if the sweetpotato harvest was delayede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield loss from a 4 WAP application of thifensulfuron may in fact be a delay in crop maturity that could be recovered if the sweetpotato harvest was delayed”
t0“Sweetpotato”
The same questions in other papers
thifensulfuron · yield · Ipomoea batatas (sweet potato)Results agree
1 paper in the same direction as this paper
- no effect
transplanting · yield · Ipomoea batatas (sweet potato)Positive and negative results
5 papers in the same direction as this paper · 12 in the opposite direction
- no effect
- no effect
- positive
14 papers more in this group
See all 18 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.