Abstract
ABSTRACT: The introduction of Clearfield® system for irrigated rice production provided an effective management strategy in the selective control of weeds. However, the selection pressure caused by the continuous use of herbicides such as imazapyr+imazapic belonging to the imidazolinone chemical group, without the proper integrated management of weeds, has favored the selection of resistant accessions. The goals of this work were to confirm the resistance to ALS inhibitors in accessions of E. crusgalli var. mitis collected in rice fields of the state of Rio Grande do Sul and to evaluate the control with alternative herbicides registered for weed control. Three experiments were conducted in a greenhouse using plant seeds that survived the application of the herbicide imazapyr+imazapic, collected in irrigated rice producing regions with suspected resistance escapes. For dose-response curve study, three resistant accessions (ECH1 - Pelotas/Rio Grande do Sul, ECH27 - Arroio Grande/Rio Grande do Sul and ECH38 - Rio Grande/Rio Grande do Sul) and two susceptible accessions (ECH14 - Pelotas/Rio Grande do Sul and ECH44 - Rio Grande / Rio Grande do Sul) (factor A) and 11 doses of the herbicide imazapyr+imazapic (factor B) were selected. The results indicate that barnyardgrass resistant accessions present a high resistance level to imazapyr+imazapic. ALS inhibiting herbicides such as imazethapyr+imazapic, bispyribac-sodium and penoxsulam did not control the resistant accessions either. Integrated weed management should be adopted and alternative mechanisms of action as ACCAse (cyhalofop-butyl, profoxydim and clethodim) and EPSPS (glyphosate) inhibitors are still eficients controlling barnyardgrass ALS resistant accessions.
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Claims 9
Claim · model-written summary
Barnyardgrass accessions from rice fields had high resistance to imazapyr+imazapic.
- Taxon
- Rice
Oryza sativat0 - Treatment
- imazapyr+imazapice0
- Interactor
- barnyardgrass
Echinochloa crus-gallie0weed - Outcome
- barnyardgrass resistant accessions present a high resistance levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Rice”
e0“barnyardgrass resistant accessions present a high resistance level to imazapyr+imazapic.”
Claim · model-written summary
Imazethapyr+imazapic did not control resistant barnyardgrass accessions.
- Taxon
- RiceOryza sativat0
- Treatment
- imazethapyr+imazapice0
- Interactor
- barnyardgrassEchinochloa crus-gallie1weed
- Outcome
- barnyardgrass ALS resistant accessionse1
- Direction
- did not controle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Rice”
e0“ALS inhibiting herbicides such as imazethapyr+imazapic, bispyribac-sodium and penoxsulam did not control the resistant accessions either.”
e1“controlling barnyardgrass ALS resistant accessions”
Claim · model-written summary
Bispyribac-sodium did not control resistant barnyardgrass accessions.
- Taxon
- RiceOryza sativat0
- Treatment
- bispyribac-sodiume0
- Interactor
- barnyardgrassEchinochloa crus-gallie1weed
- Outcome
- barnyardgrass ALS resistant accessionse1
- Direction
- did not controle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Rice”
e0“ALS inhibiting herbicides such as imazethapyr+imazapic, bispyribac-sodium and penoxsulam did not control the resistant accessions either.”
e1“controlling barnyardgrass ALS resistant accessions”
Claim · model-written summary
Penoxsulam did not control resistant barnyardgrass accessions.
- Taxon
- RiceOryza sativat0
- Treatment
- penoxsulame0
- Interactor
- barnyardgrassEchinochloa crus-gallie1weed
- Outcome
- barnyardgrass ALS resistant accessionse1
- Direction
- did not controle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Rice”
e0“ALS inhibiting herbicides such as imazethapyr+imazapic, bispyribac-sodium and penoxsulam did not control the resistant accessions either.”
e1“controlling barnyardgrass ALS resistant accessions”
Claim · model-written summary
Cyhalofop-butyl remained effective against ALS-resistant barnyardgrass accessions.
- Taxon
- RiceOryza sativat0
- Treatment
- cyhalofop-butyle0
- Interactor
- barnyardgrassEchinochloa crus-gallie0weed
- Outcome
- barnyardgrass ALS resistant accessionse0
- Direction
- eficients controllinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Rice”
e0“ACCAse (cyhalofop-butyl, profoxydim and clethodim) and EPSPS (glyphosate) inhibitors are still eficients controlling barnyardgrass ALS resistant accessions.”
Claim · model-written summary
Profoxydim remained effective against ALS-resistant barnyardgrass accessions.
- Taxon
- RiceOryza sativat0
- Treatment
- profoxydime0
- Interactor
- barnyardgrassEchinochloa crus-gallie0weed
- Outcome
- barnyardgrass ALS resistant accessionse0
- Direction
- eficients controllinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Rice”
e0“ACCAse (cyhalofop-butyl, profoxydim and clethodim) and EPSPS (glyphosate) inhibitors are still eficients controlling barnyardgrass ALS resistant accessions.”
Claim · model-written summary
Clethodim remained effective against ALS-resistant barnyardgrass accessions.
- Taxon
- RiceOryza sativat0
- Treatment
- clethodime0
- Interactor
- barnyardgrassEchinochloa crus-gallie0weed
- Outcome
- barnyardgrass ALS resistant accessionse0
- Direction
- eficients controllinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Rice”
e0“ACCAse (cyhalofop-butyl, profoxydim and clethodim) and EPSPS (glyphosate) inhibitors are still eficients controlling barnyardgrass ALS resistant accessions.”
Claim · model-written summary
Glyphosate remained effective against ALS-resistant barnyardgrass accessions.
- Taxon
- RiceOryza sativat0
- Treatment
- glyphosatee0
- Interactor
- barnyardgrassEchinochloa crus-gallie0weed
- Outcome
- barnyardgrass ALS resistant accessionse0
- Direction
- eficients controllinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Rice”
e0“ACCAse (cyhalofop-butyl, profoxydim and clethodim) and EPSPS (glyphosate) inhibitors are still eficients controlling barnyardgrass ALS resistant accessions.”
Claim · model-written summary
Integrated weed management was recommended for irrigated rice.
- Taxon
- RiceOryza sativat0
- Outcome
- Integrated weed management should be adoptede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigated Rice”
e0“Integrated weed management should be adopted”
The same questions in other papers
bispyribac-sodium · Echinochloa crus-galli · Oryza sativa (rice)Positive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →Penoxsulam · Echinochloa crus-galli · Oryza sativa (rice)Positive and negative results
13 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →clethodim · Echinochloa crus-galli · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
profoxydim · Echinochloa crus-galli · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
Cyhalofop-butyl · Echinochloa crus-galli · Oryza sativa (rice)Results agree
8 papers in the same direction as this paper
- positive
- positive
- 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.