Abstract
Synergistic interaction between the insecticide terbufos and the herbicide nicosulfuron may result in severe injury to corn. Greenhouse and laboratory experiments were conducted to determine if using the imidazolinone-resistant corn ‘Pioneer-3343 IR’ (P-3343 IR) or coating corn seeds with naphthalic anhydride (NA) would reduce herbicidal injury imposed by the nicosulfuron-terbufos interaction. Greenhouse experiments showed nicosulfuron-terbufos interactions resulting in herbicidal injury in both P-3343 IR and ‘DeKalb 689’ (D-689) corn varieties, but the D-689 was more sensitive than the P-3343 IR corn. The greenhouse experiments also demonstrated protection against the nicosulfuron-terbufos interaction by NA seed treatments. Studies with radiolabeled nicosulfuron showed that terbufos inhibited the metabolism of nicosulfuron, but pretreatment of D-689 and P-3343 IR corn seed with NA decreased the inhibition in excised corn leaves. The differences in sensitivity to nicosulfuron in the two corn varieties resulted in part from the differential metabolism and primarily from the differential sensitivity of the target enzyme, acetolactate synthase, to the herbicide.
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Claims 8
Claim · model-written summary
The nicosulfuron-terbufos interaction injured P-3343 IR corn.
- Taxon
- corn
Zea mays subsp. mayse0 - Material
- P-3343 IRe0
- Treatment
- nicosulfuron-terbufose0
- Outcome
- herbicidal injurye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nicosulfuron-terbufos interactions resulting in herbicidal injury in both P-3343 IR and ‘DeKalb 689’ (D-689) corn varieties”
Claim · model-written summary
The nicosulfuron-terbufos interaction injured D-689 corn.
- Taxon
- cornZea mays subsp. mayse0
- Material
- D-689e0
- Treatment
- nicosulfuron-terbufose0
- Outcome
- herbicidal injurye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nicosulfuron-terbufos interactions resulting in herbicidal injury in both P-3343 IR and ‘DeKalb 689’ (D-689) corn varieties”
Claim · model-written summary
D-689 was more sensitive than P-3343 IR to the herbicide interaction.
- Taxon
- cornZea mays subsp. mayse0
- Material
- D-689e0
- Outcome
- sensitivee0
- Direction
- moree0
- Comparator
- P-3343 IRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the D-689 was more sensitive than the P-3343 IR corn.”
Claim · model-written summary
Naphthalic anhydride seed treatment protected corn from nicosulfuron-terbufos injury.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- NA seed treatmentse0
- Outcome
- protection against the nicosulfuron-terbufos interactione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“protection against the nicosulfuron-terbufos interaction by NA seed treatments.”
t0“Corn”
Claim · model-written summary
Terbufos inhibited nicosulfuron metabolism in corn leaves.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- terbufose0
- Outcome
- metabolism of nicosulfurone0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“terbufos inhibited the metabolism of nicosulfuron”
t0“Corn”
Claim · model-written summary
NA pretreatment decreased inhibition of nicosulfuron metabolism in excised corn leaves.
- Taxon
- cornZea mays subsp. mayse0
- Organ / stage
- excised corn leavese0
- Treatment
- pretreatment of D-689 and P-3343 IR corn seed with NAe0
- Outcome
- inhibitione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pretreatment of D-689 and P-3343 IR corn seed with NA decreased the inhibition in excised corn leaves.”
Claim · model-written summary
Varietal sensitivity differences partly reflected differential nicosulfuron metabolism.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- differences in sensitivity to nicosulfurone0
- Qualifier
- differential metabolisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The differences in sensitivity to nicosulfuron in the two corn varieties resulted in part from the differential metabolism”
Claim · model-written summary
Varietal sensitivity differences were primarily due to differential acetolactate synthase sensitivity.
- Taxon
- cornZea mays subsp. mayst0
- Gene
- acetolactate synthasee0
- Outcome
- differential sensitivitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“primarily from the differential sensitivity of the target enzyme, acetolactate synthase, to the herbicide.”
t0“Corn”
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