Abstract
Dry bean producers have limited postemergence broadleaf weed control options. The purpose of this research was to determine whether bentazon increased dry edible bean tolerance to postemergence imazethapyr applications. Imazethapyr and bentazon were applied with a petroleum oil adjuvant to ‘Olathe’ pinto bean in the field and greenhouse. Imazethapyr injured pinto bean 7 DAT in the field and greenhouse. Chlorophyll a content, a quantitative measure of bean chlorosis, decreased compared to the untreated control following imazethapyr application. When 840 g ha −1 of bentazon was tank-mixed with 53 g ha −1 of imazethapyr, bean injury decreased and chlorophyll a increased compared to imazethapyr alone. Fifty three g ha −1 of imazethapyr delayed physiological maturity by 8 and 15 d compared to the untreated control in 1991 and 1992, respectively. Pinto bean seed yields were not reduced compared to the untreated control. When 840 g ha −1 of bentazon was tank-mixed with 53 g ha −1 of imazethapyr, maturity was not delayed. 14 C-Imazethapyr absorption decreased by more than 40% and translocation of 14 C from the treated leaf decreased by more than 50% when 14 C-imazethapyr was tank-mixed with bentazon compared to 14 C-imazethapyr alone. The addition of 20 mM Na-acetate inhibited absorption of 14 C-imazethapyr, but did not inhibit translocation of 14 C. The decreased absorption and translocation of imazethapyr when tank-mixed with bentazon likely accounts for the safening effect observed in greenhouse and field studies.
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Claims 13
Claim · model-written summary
Imazethapyr injured pinto bean 7 DAT in field and greenhouse.
- Taxon
- pinto beane0
- Treatment
- Imazethapyre0
- Outcome
- injurede0
- Direction
- injurede0
- Qualifier
- 7 DATe0
- Setting
- field and greenhousee0
Not reportedComparator
Verbatim
e0“Imazethapyr injured pinto bean 7 DAT in the field and greenhouse”
Claim · model-written summary
Imazethapyr decreased chlorophyll a relative to untreated control.
Verbatim
e0“Chlorophyll a content, a quantitative measure of bean chlorosis, decreased compared to the untreated control following imazethapyr application”
Claim · model-written summary
Bentazon tank mixing reduced bean injury relative to imazethapyr alone.
Verbatim
e0“When 840 g ha −1 of bentazon was tank-mixed with 53 g ha −1 of imazethapyr, bean injury decreased and chlorophyll a increased compared to imazethapyr alone”
Claim · model-written summary
Bentazon tank mixing increased chlorophyll a relative to imazethapyr alone.
Verbatim
e0“When 840 g ha −1 of bentazon was tank-mixed with 53 g ha −1 of imazethapyr, bean injury decreased and chlorophyll a increased compared to imazethapyr alone”
Claim · model-written summary
Imazethapyr delayed maturity by 8 days in 1991.
Verbatim
e0“Fifty three g ha −1 of imazethapyr delayed physiological maturity by 8 and 15 d compared to the untreated control in 1991 and 1992, respectively”
t0“Pinto Bean”
Claim · model-written summary
Imazethapyr delayed maturity by 15 days in 1992.
Verbatim
e0“Fifty three g ha −1 of imazethapyr delayed physiological maturity by 8 and 15 d compared to the untreated control in 1991 and 1992, respectively”
t0“Pinto Bean”
Claim · model-written summary
Pinto bean seed yield was not reduced relative to untreated control.
Verbatim
e0“Pinto bean seed yields were not reduced compared to the untreated control”
e1“Fifty three g ha −1 of imazethapyr delayed physiological maturity by 8 and 15 d compared to the untreated control in 1991 and 1992, respectively”
Claim · model-written summary
Bentazon tank mixing prevented a maturity delay.
- Taxon
- Pinto Beant0
- Treatment
- 840 g ha −1 of bentazon was tank-mixed with 53 g ha −1 of imazethapyre0
- Outcome
- maturitye0
- Direction
- not delayede0
Not reportedComparator
Verbatim
e0“When 840 g ha −1 of bentazon was tank-mixed with 53 g ha −1 of imazethapyr, maturity was not delayed”
t0“Pinto Bean”
Claim · model-written summary
Bentazon tank mixing decreased 14 C-Imazethapyr absorption by more than 40%.
Verbatim
e0“14 C-Imazethapyr absorption decreased by more than 40% and translocation of 14 C from the treated leaf decreased by more than 50% when 14 C-imazethapyr was tank-mixed with bentazon compared to 14 C-imazethapyr alone”
t0“Pinto Bean”
Claim · model-written summary
Bentazon tank mixing decreased 14 C translocation from treated leaf by more than 50%.
Verbatim
e0“14 C-Imazethapyr absorption decreased by more than 40% and translocation of 14 C from the treated leaf decreased by more than 50% when 14 C-imazethapyr was tank-mixed with bentazon compared to 14 C-imazethapyr alone”
t0“Pinto Bean”
Claim · model-written summary
Na-acetate inhibited 14 C-imazethapyr absorption.
- Taxon
- Pinto Beant0
- Treatment
- 20 mM Na-acetatee0
- Outcome
- absorption of 14 C-imazethapyre0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“The addition of 20 mM Na-acetate inhibited absorption of 14 C-imazethapyr, but did not inhibit translocation of 14 C”
t0“Pinto Bean”
Claim · model-written summary
Na-acetate did not inhibit 14 C translocation.
- Taxon
- Pinto Beant0
- Treatment
- 20 mM Na-acetatee0
- Outcome
- translocation of 14 Ce0
- Direction
- did not inhibite0
Not reportedComparator
Verbatim
e0“The addition of 20 mM Na-acetate inhibited absorption of 14 C-imazethapyr, but did not inhibit translocation of 14 C”
t0“Pinto Bean”
Claim · model-written summary
Reduced absorption and translocation likely explain bentazon safening.
- Taxon
- Pinto Beant0
- Treatment
- bentazone0
- Outcome
- safening effecte0
- Qualifier
- decreased absorption and translocation of imazethapyre0
Not reportedDirection
Verbatim
e0“The decreased absorption and translocation of imazethapyr when tank-mixed with bentazon likely accounts for the safening effect observed in greenhouse and field studies”
t0“Pinto Bean”
The same questions in other papers
bentazone · physiology: pigments · Phaseolus vulgaris (common bean)Positive and negative results
1 in the opposite direction
- negative
Imazethapyr · physiology: pigments · Phaseolus vulgaris (common bean)Positive and negative results
1 in the opposite direction
- negative
Imazethapyr · crop injury · Phaseolus vulgaris (common bean)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- negative
3 papers more in this group
See all 7 papers →bentazone · crop injury · Phaseolus vulgaris (common bean)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- negative
- positive
- negative
3 papers more in this group
See all 7 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.