Abstract
ABSTRACT Crop stand directly affects ability of any crop to compete with weeds. To capture this form of cultural weed control, final crop stands need to be uniform. Peanut stands are frequently non-uniform, despite the use of precision vacuum planters. Trials were conducted from 2009 through 2011 in Tifton, GA to determine the effect of non-uniform peanut stands on weed control, grade, and marketable peanut yield. Non-uniform peanut stands were established by modifying vacuum planter discs that created skips 18 cm wide and 36 cm wide at regular intervals and compared with peanut at a uniform stand. The weed control regimes chosen reflected differing degrees of residual weed control provided by flumioxazin or imazapic and addressed the need for residual weed control when peanut stands are non-uniform. Postemergence (POST) herbicides bentazon, paraquat, and 2,4-DB were chosen to test the theory that properly timed applications of non-residual herbicides will control weeds in skips without the need for preemergence (PRE) herbicides. There was no significant interaction between peanut stand uniformity and weed control regime for any parameter. Weed response to peanut stand was variable among species and inconsistent. Weed densities tended to be lower when the residual herbicides flumioxazin and/or imazapic were part of the herbicide regime. Peanut yields and percent total sound mature kernels were not affected by narrow (18 cm) skips, but were reduced two years out of three by wide (36 cm) skips. Peanut yields and grade were similar among weed control regimes that used PRE herbicides and POST herbicides with no residual weed control properties. These results indicate that weed control considerations are not a factor when peanut skips are <18 cm. The herbicide choices evaluated are capable of controlling weeds allowing peanut to compensate for non-uniform stands and not have yield reduction when skips are <18 cm.
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Claims 7
Claim · model-written summary
No significant interaction occurred between stand uniformity and weed regime.
- Taxon
- peanut
Arachis hypogaeae0 - Treatment
- weed control regimee0
- Outcome
- interaction between peanut stand uniformity and weed control regimee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant interaction between peanut stand uniformity and weed control regime for any parameter.”
Claim · model-written summary
Weed response to stand was variable and inconsistent.
- Taxon
- peanutArachis hypogaeae0
- Outcome
- Weed responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed response to peanut stand was variable among species and inconsistent.”
Claim · model-written summary
Residual herbicides tended to lower weed densities.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- flumioxazin and/or imazapice0
- Outcome
- Weed densitiese0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed densities tended to be lower when the residual herbicides flumioxazin and/or imazapic were part of the herbicide regime.”
t0“Peanut”
Claim · model-written summary
Narrow skips did not affect peanut yield or mature kernel percentage.
- Taxon
- PeanutArachis hypogaeae0
- Treatment
- narrow (18 cm) skipse0
- Outcome
- Peanut yields and percent total sound mature kernelse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peanut yields and percent total sound mature kernels were not affected by narrow (18 cm) skips”
Claim · model-written summary
Wide skips reduced yield and mature kernel percentage in two of three years.
- Taxon
- PeanutArachis hypogaeae0
- Treatment
- wide (36 cm) skipse0
- Outcome
- Peanut yields and percent total sound mature kernelse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peanut yields and percent total sound mature kernels were not affected by narrow (18 cm) skips, but were reduced two years out of three by wide (36 cm) skips.”
Claim · model-written summary
Yield and grade were similar among pre and postemergence herbicide regimes.
- Taxon
- PeanutArachis hypogaeae0
- Treatment
- PRE herbicidese0
- Outcome
- Peanut yields and gradee0
- Direction
- similare0
- Comparator
- POST herbicides with no residual weed control propertiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peanut yields and grade were similar among weed control regimes that used PRE herbicides and POST herbicides with no residual weed control properties.”
Claim · model-written summary
Weed control was not a factor for skips below 18 cm.
- Taxon
- peanutArachis hypogaeae0
- Outcome
- weed control considerations are not a factore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed control considerations are not a factor when peanut skips are <18 cm.”
The same questions in other papers
flumioxazin · weed · Arachis hypogaea (peanut)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
imazapic · weed · Arachis hypogaea (peanut)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →herbicide · yield · Arachis hypogaea (peanut)Positive and negative results
57 papers in the same direction as this paper · 172 in the opposite direction
- positive
- positive
- positive
226 papers more in this group
See all 230 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.