Abstract
POST combinations of photosystem II (PSII) and the 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors are effective for control of broadleaf weeds in corn. Field studies were conducted during 2007 and 2008 in Urbana and Dekalb, IL, to determine the nature of interactions between two PSII inhibitors, atrazine and bromoxynil, and the HPPD inhibitor mesotrione, based on control of common waterhemp, common lambsquarters, and giant ragweed. Two rates of each herbicide were evaluated, with the highest representing a typical recommended rate, and the lowest a fraction of that rate. Synergistic interactions occurred for common waterhemp control from 10 to 30 d after treatment (DAT) regardless of herbicide rates, rainfall accumulation, or plant height. Synergism between mesotrione and bromoxynil was not observed for common lambsquarters control at Urbana in 2008 at the lower herbicide rates, possibly due to taller weed heights at the time of herbicide application relative to 2007. Giant ragweed control indicated that a synergistic interaction occurred for all herbicides and rates in 2008. However, synergism between bromoxynil and mesotrione did not occur in 2007, likely due to limited rainfall before herbicide application. Reduced herbicide rates and adverse environmental conditions have the potential to regulate the expression of synergism between mesotrione and PSII inhibitors, and therefore may limit their effectiveness for weed management in corn.
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Claims 4
Claim · model-written summary
Synergistic interactions between PSII and HPPD herbicide combinations occurred for common waterhemp control in corn, regardless of herbicide rate, rainfall or weed height.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- atrazine and bromoxynile1
- Interactor
- common waterhempe1weed
- Outcome
- common waterhemp controle2
- Qualifier
- regardless of herbicide ratese2
- Setting
- Urbana and Dekalb, ILe1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POST combinations of photosystem II (PSII) and the 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors are effective for control of broadleaf weeds in corn”
e1“Field studies were conducted during 2007 and 2008 in Urbana and Dekalb, IL, to determine the nature of interactions between two PSII inhibitors, atrazine and bromoxynil, and the HPPD inhibitor mesotrione, based on control of common waterhemp, common lambsquarters, and giant ragweed”
e2“Synergistic interactions occurred for common waterhemp control from 10 to 30 d after treatment (DAT) regardless of herbicide rates, rainfall accumulation, or plant height”
Claim · model-written summary
Synergism between mesotrione and bromoxynil was not observed for common lambsquarters control in corn at Urbana in 2008 at the lower herbicide rates.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- mesotrione and bromoxynile3
- Interactor
- common lambsquarters
Chenopodium albume3weed - Outcome
- common lambsquarters controle3
- Direction
- no_changeinferrede3
- Qualifier
- possibly due to taller weed heightse3
- Setting
- Urbanae3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POST combinations of photosystem II (PSII) and the 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors are effective for control of broadleaf weeds in corn”
e3“Synergism between mesotrione and bromoxynil was not observed for common lambsquarters control at Urbana in 2008 at the lower herbicide rates, possibly due to taller weed heights at the time of herbicide application relative to 2007”
Claim · model-written summary
A synergistic interaction occurred for giant ragweed control in corn across all herbicides and rates in 2008.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- all herbicidese4
- Interactor
- Giant ragweed
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Ambrosia trifidae4weed - Outcome
- Giant ragweed controle4
- Qualifier
- synergistic interaction occurrede4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“POST combinations of photosystem II (PSII) and the 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors are effective for control of broadleaf weeds in corn”
e4“Giant ragweed control indicated that a synergistic interaction occurred for all herbicides and rates in 2008”
Claim · model-written summary
Synergism between bromoxynil and mesotrione did not occur in corn in 2007, likely due to limited rainfall before herbicide application.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- bromoxynil and mesotrionee5
- Outcome
- synergisme5
- Qualifier
- likely due to limited rainfall before herbicide applicatione5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“POST combinations of photosystem II (PSII) and the 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors are effective for control of broadleaf weeds in corn”
e5“However, synergism between bromoxynil and mesotrione did not occur in 2007, likely due to limited rainfall before herbicide application”
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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.