Abstract
Transgenic, herbicide-resistant cultivars and equipment to spindle-pick 38-cm rows has renewed interest in narrow-row cotton production. Field experiments were conducted at four locations in North Carolina during 2004 and 2005 to evaluate weed management systems in glufosinate-resistant cotton planted in 38- and 97-cm rows. Weeds included broadleaf signalgrass, goosegrass, fall panicum, large crabgrass, Palmer amaranth, smooth pigweed, pitted morningglory, and tall morningglory. Greater than 90% control of annual grasses and Amaranthus spp. in 2004 and Ipomoea spp. in both years was obtained in narrow-row cotton with glufosinate applied early POST (EPOST) and mid-POST (MPOST) to two- and six-leaf cotton, respectively. With good early-season control by glufosinate and rapid canopy closure, there was little benefit from pendimethalin, fluometuron, or pyrithiobac applied PRE, S-metolachlor or pyrithiobac mixed with glufosinate applied MPOST, or trifloxysulfuron applied late POST (LPOST) to 11-leaf cotton in 2004. In 2005, with larger weeds at initial application, glufosinate EPOST and MPOST did not adequately control annual grasses and Amaranthus spp. Pendimethalin PRE increased control to greater than 90% and increased yields 59 to 75%. Pendimethalin PRE followed by S-metolachlor or pyrithiobac mixed with glufosinate at MPOST was no more effective than pendimethalin alone. Without PRE herbicides, trifloxysulfuron applied LPOST increased Amaranthus but not annual grass control. Cotton row spacing had no effect on cotton yield and little effect on weed control.Nomenclature: Fluometuron; S-metolachlor; MSMA; pendimethalin; prometryn; pyrithiobac; trifloxysulfuron; broadleaf signalgrass, Brachiaria platyphylla (Griseb.) Nash BRAPP; fall panicum, Panicum dichotomiflorum Michx. PANDI; goosegrass, Eleusine indica (L.) Gaertn. ELEIN; large crabgrass, Digitaria sanguinalis (L.) Scop. DIGSA; Palmer amaranth, Amaranthus palmeri (S.) Wats. AMAPA; pitted morningglory, Ipomoea lacunosa L. IPOLA; smooth pigweed, Amaranthus hybridus L. AMACH; tall morningglory, Ipomoea purpurea (L.) Roth PHBPU; cotton, Gossypium hirsutum L. ‘FM 958LL’.
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Claims 11
Claim · model-written summary
Glufosinate EPOST and MPOST in narrow-row cotton controlled annual grasses and Amaranthus above 90% in 2004.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- glufosinate applied early POST (EPOST) and mid-POST (MPOST)e0
- Interactor
- Amaranthus spp.
_with_green_foliage%2C_photographed_in_Tamil_Nadu%2C_India.jpg?width=60)
Amaranthuse0weed - Outcome
- control of annual grasses and Amaranthus spp.e0
- Direction
- Greater thane0
- Value
- 90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_with_green_foliage%2C_photographed_in_Tamil_Nadu%2C_India.jpg?width=500)
Verbatim
e0“Greater than 90% control of annual grasses and Amaranthus spp. in 2004 and Ipomoea spp. in both years was obtained in narrow-row cotton with glufosinate applied early POST (EPOST) and mid-POST (MPOST) to two- and six-leaf cotton, respectively”
Claim · model-written summary
Glufosinate EPOST and MPOST controlled Ipomoea above 90% in both years.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- glufosinate applied early POST (EPOST) and mid-POST (MPOST)e0
- Outcome
- Ipomoea spp.e0
- Direction
- Greater thane0
- Value
- 90%e0
IpomoeaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greater than 90% control of annual grasses and Amaranthus spp. in 2004 and Ipomoea spp. in both years was obtained in narrow-row cotton with glufosinate applied early POST (EPOST) and mid-POST (MPOST) to two- and six-leaf cotton, respectively”
Claim · model-written summary
Additional herbicides offered little benefit after glufosinate and rapid canopy closure in 2004.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- pendimethalin, fluometuron, or pyrithiobac applied PREe0
- Outcome
- little benefite0
- Direction
- little benefite0
- Comparator
- glufosinatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With good early-season control by glufosinate and rapid canopy closure, there was little benefit from pendimethalin, fluometuron, or pyrithiobac applied PRE, S-metolachlor or pyrithiobac mixed with glufosinate applied MPOST, or trifloxysulfuron applied late POST (LPOST) to 11-leaf cotton in 2004”
Claim · model-written summary
Glufosinate EPOST and MPOST inadequately controlled annual grasses and Amaranthus in 2005.
- Taxon
- cottonGossypium hirsutumt0
- Interactor
- Amaranthus spp.Amaranthuse0weed
- Outcome
- control annual grasses and Amaranthus spp.e0
- Qualifier
- larger weeds at initial applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2005, with larger weeds at initial application, glufosinate EPOST and MPOST did not adequately control annual grasses and Amaranthus spp.”
t0“Cotton”
Claim · model-written summary
Pendimethalin PRE raised weed control above 90%.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Pendimethalin PREe0
- Outcome
- controle0
- Direction
- increasede0
- Value
- greater than 90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pendimethalin PRE increased control to greater than 90% and increased yields 59 to 75%”
t0“Cotton”
Claim · model-written summary
Pendimethalin PRE raised cotton yields by 59 to 75%.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Pendimethalin PREe0
- Outcome
- yieldse0
- Direction
- increasede0
- Value
- 59 to 75%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pendimethalin PRE increased control to greater than 90% and increased yields 59 to 75%”
t0“Cotton”
Claim · model-written summary
Adding S-metolachlor or pyrithiobac at MPOST was no more effective than pendimethalin alone.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- Pendimethalin PRE followed by S-metolachlor or pyrithiobac mixed with glufosinate at MPOSTe0
- Outcome
- no more effectivee0
- Direction
- no more effectivee0
- Comparator
- pendimethalin alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pendimethalin PRE followed by S-metolachlor or pyrithiobac mixed with glufosinate at MPOST was no more effective than pendimethalin alone”
t0“Cotton”
Claim · model-written summary
Without PRE herbicides, late trifloxysulfuron increased Amaranthus control.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- trifloxysulfuron applied LPOSTe0
- Interactor
- AmaranthusAmaranthuse0weed
- Outcome
- Amaranthuse0
- Direction
- increasede0
- Comparator
- Without PRE herbicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Without PRE herbicides, trifloxysulfuron applied LPOST increased Amaranthus but not annual grass control”
t0“Cotton”
Claim · model-written summary
Late trifloxysulfuron did not increase annual grass control.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- trifloxysulfuron applied LPOSTe0
- Outcome
- annual grass controle0
- Direction
- note0
- Comparator
- Without PRE herbicidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Without PRE herbicides, trifloxysulfuron applied LPOST increased Amaranthus but not annual grass control”
t0“Cotton”
Claim · model-written summary
Cotton row spacing had no yield effect.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- row spacinge0
- Outcome
- cotton yielde0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton row spacing had no effect on cotton yield and little effect on weed control”
Claim · model-written summary
Cotton row spacing had little effect on weed control.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- row spacinge0
- Outcome
- weed controle0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton row spacing had no effect on cotton yield and little effect on weed control”
The same questions in other papers
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- no effect
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1 paper in the same direction as this paper
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See all 171 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.