Abstract
Field experiments were conducted at Oakes, Absaraka, and Tappen, ND, in 2006 and repeated at Oakes and Absaraka, ND, in 2007 to evaluate early season weed control of common lambsquarters and redroot pigweed in onion with POST herbicides applied at multiple reduced rates (microrates) and to determine whether microrate herbicide treatments effectively reduced early season broadleaf weed competition, caused crop injury, or affected yield. Application rates of bromoxynil, oxyfluorfen, metribuzin, and acifluorfen were reduced to 0.25, 0.13, and 0.06× of their lowest labeled rate and applied in sequential applications (every 7 d) either two or three times. The 0.25× rate of bromoxynil (70.1 g ae/ha) provided the greatest control of common lambsquarters (95%). The 0.25× rates of bromoxynil and oxyfluorfen (70.1 g ai/ha) provided the greatest control of redroot pigweed (93 and 85%, respectively). Microrate applications of metribuzin or acifluorfen did not effectively control common lambsquarters or redroot pigweed. In 2006, no onion injury was observed. However, in 2007, applications of oxyfluorfen resulted in approximately 15% injury, regardless of the herbicide rate or the number of applications. Plants outgrew symptoms by 4 wk after treatment and were similar to the untreated plants. Onion treated with oxyfluorfen had the greatest total yield, followed by onion treated with bromoxynil. Onion treated with acifluorfen had a greater total marketable bulb yield than onion treated with metribuzin, but yield was considered poor compared to the other herbicide treatments. Three microrate applications provided greater weed control and increased yield compared with two applications across herbicides and rates. Results suggest that microrate applications of bromoxynil and oxyfluorfen will provide early season broadleaf weed control in onion.
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Claims 13
Claim · model-written summary
Bromoxynil at 0.25× controlled common lambsquarters by 95%.
- Taxon
- onion
Allium cepat0 - Treatment
- 0.25× rate of bromoxynil (70.1 g ae/ha)e0
- Interactor
- common lambsquarters
Chenopodium albume0weed - Outcome
- control of common lambsquarterse0
- Direction
- greateste0
- Value
- 95%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.25× rate of bromoxynil (70.1 g ae/ha) provided the greatest control of common lambsquarters (95%)”
t0“onion”
Claim · model-written summary
Bromoxynil at 0.25× controlled redroot pigweed by 93%.
- Taxon
- onionAllium cepat0
- Treatment
- 0.25× rates of bromoxynile0
- Interactor
- redroot pigweede0weed
- Outcome
- control of redroot pigweede0
- Direction
- greateste0
- Value
- 93e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.25× rates of bromoxynil and oxyfluorfen (70.1 g ai/ha) provided the greatest control of redroot pigweed (93 and 85%, respectively)”
t0“onion”
Claim · model-written summary
Oxyfluorfen at 0.25× controlled redroot pigweed by 85%.
- Taxon
- onionAllium cepat0
- Treatment
- oxyfluorfen (70.1 g ai/ha)e0
- Interactor
- redroot pigweede0weed
- Outcome
- control of redroot pigweede0
- Direction
- greateste0
- Value
- 85%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.25× rates of bromoxynil and oxyfluorfen (70.1 g ai/ha) provided the greatest control of redroot pigweed (93 and 85%, respectively)”
t0“onion”
Claim · model-written summary
Metribuzin microrates did not effectively control the two weeds.
- Taxon
- onionAllium cepat0
- Treatment
- Microrate applications of metribuzine0
- Outcome
- control common lambsquarters or redroot pigweede0
- Direction
- did not effectivelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microrate applications of metribuzin or acifluorfen did not effectively control common lambsquarters or redroot pigweed”
t0“onion”
Claim · model-written summary
Acifluorfen microrates did not effectively control the two weeds.
- Taxon
- onionAllium cepat0
- Treatment
- acifluorfene0
- Outcome
- control common lambsquarters or redroot pigweede0
- Direction
- did not effectivelye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microrate applications of metribuzin or acifluorfen did not effectively control common lambsquarters or redroot pigweed”
t0“onion”
Claim · model-written summary
No onion injury was observed in 2006.
- Taxon
- onionAllium cepae0
- Outcome
- onion injurye0
- Direction
- noe0
- Qualifier
- 2006e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2006, no onion injury was observed”
Claim · model-written summary
Oxyfluorfen caused about 15% onion injury in 2007 irrespective of rate or application number.
- Taxon
- onionAllium cepat0
- Treatment
- applications of oxyfluorfene0
- Outcome
- injurye0
- Direction
- increaseinferrede0
- Value
- approximately 15%e0
- Qualifier
- regardless of the herbicide rate or the number of applicationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in 2007, applications of oxyfluorfen resulted in approximately 15% injury, regardless of the herbicide rate or the number of applications”
t0“onion”
Claim · model-written summary
Onion plants outgrew injury by four weeks and resembled untreated plants.
- Taxon
- onionAllium cepat0
- Outcome
- symptomse0
- Direction
- outgrewe0
- Qualifier
- 4 wk after treatmente0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants outgrew symptoms by 4 wk after treatment and were similar to the untreated plants”
t0“onion”
Claim · model-written summary
Oxyfluorfen treated onion had the greatest total yield.
- Taxon
- OnionAllium cepae0
- Treatment
- oxyfluorfene0
- Outcome
- total yielde0
- Direction
- greateste0
- Comparator
- onion treated with bromoxynile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion treated with oxyfluorfen had the greatest total yield, followed by onion treated with bromoxynil”
Claim · model-written summary
Acifluorfen gave greater marketable bulb yield than metribuzin.
- Taxon
- OnionAllium cepae0
- Treatment
- acifluorfene0
- Outcome
- total marketable bulb yielde0
- Direction
- greatere0
- Comparator
- onion treated with metribuzine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Onion treated with acifluorfen had a greater total marketable bulb yield than onion treated with metribuzin”
Claim · model-written summary
Three microrate applications gave greater weed control than two.
- Taxon
- onionAllium cepat0
- Treatment
- Three microrate applicationse0
- Outcome
- weed controle0
- Direction
- greatere0
- Comparator
- two applicationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three microrate applications provided greater weed control and increased yield compared with two applications across herbicides and rates”
t0“onion”
Claim · model-written summary
Three microrate applications increased yield versus two.
- Taxon
- onionAllium cepat0
- Treatment
- Three microrate applicationse0
- Outcome
- yielde0
- Direction
- increasede0
- Comparator
- two applicationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three microrate applications provided greater weed control and increased yield compared with two applications across herbicides and rates”
t0“onion”
Claim · model-written summary
The authors suggest bromoxynil and oxyfluorfen microrates for early broadleaf weed control in onion.
- Taxon
- onionAllium cepae0
- Treatment
- microrate applications of bromoxynil and oxyfluorfene0
- Outcome
- early season broadleaf weed controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“microrate applications of bromoxynil and oxyfluorfen will provide early season broadleaf weed control in onion”
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See all 6 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.