Abstract
A 4 year field study was conducted from 1998 to 2001 to evaluate the response of prickly sida ( Sida spinosa L.) and hyssop spurge ( Euphorbia hyssopifolia L.) growing in either ultra narrow row (UNR) or wide row (WR) cotton ( Gossypium hirsutum L.) management systems. Weeds surviving pre‐ and postemergence herbicide treatments were harvested just prior to defoliation and the morphological characteristics were compared. Prickly sida growth was significantly reduced with regard to the number of main stem nodes, primary, secondary and tertiary branching, number of seed capsules produced and dry weight under UNR compared with WR. However, plant height was not affected by the management system. Spurge growth was significantly reduced with regard to branching and fresh weight but not height. These results show that UNR might suppress weed development by reducing vegetative and reproductive growth of prickly sida and vegetative growth of spurge. The reduction in seed and seed capsule production of prickly sida is likely to reduce its reproductive potential and also diminish the subsequent seed rain and soil seed bank reserves. Thus, a potential benefit of UNR cotton management systems might be to reduce the competitive ability of weeds and decrease seed production.
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Claims 6
Claim · model-written summary
Ultra narrow rows significantly reduced prickly sida stem nodes and branching compared with wide rows.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- UNRe0
- Interactor
- Prickly sidae0weed
- Outcome
- number of main stem nodes, primary, secondary and tertiary branchinge0
- Direction
- reducede0
- Comparator
- WRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prickly sida growth was significantly reduced with regard to the number of main stem nodes, primary, secondary and tertiary branching, number of seed capsules produced and dry weight under UNR compared with WR.”
t0“cotton”
Claim · model-written summary
Ultra narrow rows significantly reduced prickly sida seed capsules and dry weight compared with wide rows.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- UNRe0
- Interactor
- Prickly sidae0weed
- Outcome
- number of seed capsules produced and dry weighte0
- Direction
- reducede0
- Comparator
- WRe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prickly sida growth was significantly reduced with regard to the number of main stem nodes, primary, secondary and tertiary branching, number of seed capsules produced and dry weight under UNR compared with WR.”
t0“cotton”
Claim · model-written summary
Prickly sida height did not differ by row management system.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- management systeme0
- Interactor
- Prickly sidat0weed
- Outcome
- plant heighte0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, plant height was not affected by the management system.”
t0“Prickly sida (Sida spinosa L.) and spurge (Euphorbia hyssopifolia L.) response to wide row and ultra narrow row cotton”
Claim · model-written summary
Ultra narrow rows significantly reduced spurge branching and fresh weight compared with wide rows.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- ultra narrow rowt0
- Interactor
- Spurgee0weed
- Outcome
- branching and fresh weighte0
- Direction
- reducede0
- Comparator
- wide rowt0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spurge growth was significantly reduced with regard to branching and fresh weight but not height.”
t0“spurge (Euphorbia hyssopifolia L.) response to wide row and ultra narrow row cotton”
Claim · model-written summary
Spurge height was not reduced by ultra narrow rows.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- ultra narrow rowt0
- Interactor
- Spurgee0weed
- Outcome
- heighte0
- Direction
- not heighte0
- Comparator
- wide rowt0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spurge growth was significantly reduced with regard to branching and fresh weight but not height.”
t0“spurge (Euphorbia hyssopifolia L.) response to wide row and ultra narrow row cotton”
Claim · model-written summary
The authors suggest ultra narrow row cotton may suppress weed development and seed production.
- Taxon
- cottonGossypium hirsutume0
- Interactor
- weedse0weed
- Outcome
- reduce the competitive ability of weeds and decrease seed productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thus, a potential benefit of UNR cotton management systems might be to reduce the competitive ability of weeds and decrease seed production.”
The same questions in other papers
cultivation system · growth · Gossypium hirsutum (cotton)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
- negative
1 paper more in this group
See all 5 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.