Abstract
Protoporphyrinogen oxidase- (PPO-) resistant Amaranthus palmeri (S.) Wats. (Palmer amaranth) was confirmed in Arkansas in 2015. Field trials were conducted in Crawfordsville, Gregory, and Marion, Arkansas in 2016, and Crawfordsville and Marion in 2017, assessing PPO-resistant Palmer amaranth control options in Glycine max (L.) Merr. (soybean). Twelve trials consisted of 26 preemergence (PRE) treatments, evaluated for Palmer amaranth control and density reduction at 28 days after treatment (DAT). Treatments that consisted of PPO- or acetolactate synthase- (ALS-) inhibiting herbicides such as flumioxazin (72 g ai ha−1) or sulfentrazone + cloransulam (195 g ha−1 + 25 g ha−1) controlled Palmer amaranth <60%. At 28 DAT, treatments including mixtures of a very-long-chain fatty acid (VLCFA) plus the photosystem II- (PSII-) inhibiting herbicide metribuzin provided increased control over single herbicide sites of action (SOA) or herbicides mixtures to which Palmer amaranth was resistant. Pyroxasulfone + metribuzin (149 g ha−1 + 314 g ha−1) controlled Palmer amaranth 91% control across twelve trials at 28 DAT. S-metolachlor alone did not provide consistent, acceptable control of PPO-resistant Palmer amaranth (55–77%); subsequent research has determined that these populations are resistant to S-metolachlor. A minimum of two effective herbicides should be included in soybean PRE programs for control of PPO-resistant Palmer amaranth.
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Claims 5
Claim · model-written summary
Flumioxazin, or sulfentrazone plus cloransulam, controlled Palmer amaranth below 60%.
- Taxon
- soybean
Glycine maxe0 - Treatment
- flumioxazine1
- Interactor
- Palmer amaranthe1weed
- Outcome
- Palmer amaranthe1
- Direction
- controllede1
- Value
- <60%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“assessing PPO-resistant Palmer amaranth control options in Glycine max (L.) Merr. (soybean)”
e1“such as flumioxazin (72 g ai ha−1) or sulfentrazone + cloransulam (195 g ha−1 + 25 g ha−1) controlled Palmer amaranth <60%”
Claim · model-written summary
Mixtures with metribuzin gave increased control over single herbicide sites of action.
- Taxon
- soybeanGlycine maxe0
- Treatment
- metribuzine2
- Interactor
- Palmer amaranthe0weed
- Outcome
- controle2
- Direction
- increasede2
- Comparator
- single herbicide sites of action (SOA)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“assessing PPO-resistant Palmer amaranth control options in Glycine max (L.) Merr. (soybean)”
e2“herbicide metribuzin provided increased control over single herbicide sites of action (SOA)”
Claim · model-written summary
Pyroxasulfone plus metribuzin controlled Palmer amaranth by 91% across twelve trials at 28 DAT.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Pyroxasulfone + metribuzine3
- Interactor
- Palmer amaranthe3weed
- Outcome
- controle3
- Direction
- controllede3
- Value
- 91%e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“assessing PPO-resistant Palmer amaranth control options in Glycine max (L.) Merr. (soybean)”
e3“Pyroxasulfone + metribuzin (149 g ha−1 + 314 g ha−1) controlled Palmer amaranth 91% control across twelve trials at 28 DAT”
Claim · model-written summary
S-metolachlor alone did not provide consistent, acceptable control of Palmer amaranth (55-77%).
- Taxon
- soybeanGlycine maxe0
- Treatment
- S-metolachlor alonee4
- Interactor
- Palmer amaranthe4weed
- Outcome
- controle4
- Direction
- did not providee4
- Value
- 55–77%e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“assessing PPO-resistant Palmer amaranth control options in Glycine max (L.) Merr. (soybean)”
e4“S-metolachlor alone did not provide consistent, acceptable control of PPO-resistant Palmer amaranth (55–77%)”
Claim · model-written summary
At least two effective herbicides should be included in soybean PRE programs for PPO-resistant Palmer amaranth.
- Taxon
- soybeanGlycine maxe5
- Interactor
- Palmer amaranthe5weed
- Outcome
- A minimum of two effective herbicidese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“A minimum of two effective herbicides should be included in soybean PRE programs for control of PPO-resistant Palmer amaranth”
The same questions in other papers
metribuzin · control · Glycine max (soybean)Positive and negative results
42 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- no effect
44 papers more in this group
See all 48 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.