Abstract
Abstract Weed control is a challenging aspect of pumpkin production. Winter rye mulches may offer growers a means to manage weeds in pumpkin; however, rye degradation leads to an immobilization of soil nitrogen. Combining winter rye with a nitrogen fixing legume such as hairy vetch is an interesting option that may solve this problem. Twelve combinations including three hairy vetch seeding rates, two termination dates and the use or not of glyphosate before rolling cover crops were studied during the 2013 and 2014 growing seasons at the Laval University Agronomic Station in Saint-Augustin-de-Desmaures, Quebec, Canada to evaluate weed control and effects on pumpkin production. Adding hairy vetch to winter rye provided no benefits because of severe winterkill of the legume. Using glyphosate was necessary to prevent rye regrowth. Pumpkin growth was better and yields were higher than in the plots were no glyphosate was used. Mulches established at flowering (Zadoks 69) provided about 2,000 kg ha −1 more aboveground dry biomass than at early heading (Zadoks 51). This high biomass was essential in glyphosate treated plots in order to maintain excellent weed control throughout the growing season. When compared with the no-mulch weed-free control, yield in Zadoks 69+glyphosate treatment was lower in 2013 but comparable in 2014.
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Claims 8
Claim · model-written summary
Adding hairy vetch to winter rye gave no benefit because of winterkill.
- Taxon
- pumpkint0
- Treatment
- Adding hairy vetch to winter ryee0
- Interactor
- hairy vetch
Vicia villosae0weed - Outcome
- no benefitse0
- Direction
- no benefitse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding hairy vetch to winter rye provided no benefits because of severe winterkill of the legume.”
t0“Pumpkin”
Claim · model-written summary
Glyphosate prevented rye regrowth.
- Taxon
- Pumpkint0
- Treatment
- glyphosatee0
- Interactor
- rye
Secale cerealee0weed - Outcome
- rye regrowthe0
- Direction
- prevente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using glyphosate was necessary to prevent rye regrowth.”
t0“Pumpkin”
Claim · model-written summary
Pumpkin growth improved with glyphosate relative to no glyphosate.
Verbatim
e0“Pumpkin growth was better and yields were higher than in the plots were no glyphosate was used.”
Claim · model-written summary
Pumpkin yields were higher with glyphosate than without.
Verbatim
e0“Pumpkin growth was better and yields were higher than in the plots were no glyphosate was used.”
Claim · model-written summary
Flowering-stage mulch supplied about 2,000 kg ha −1 more biomass than early-heading mulch.
Verbatim
e0“Mulches established at flowering (Zadoks 69) provided about 2,000 kg ha −1 more aboveground dry biomass than at early heading (Zadoks 51).”
t0“Pumpkin”
Claim · model-written summary
High mulch biomass maintained excellent weed control in glyphosate-treated plots.
- Taxon
- Pumpkint0
- Treatment
- glyphosatee0
- Outcome
- excellent weed controle0
- Qualifier
- throughout the growing seasone0
Not reportedDirection
Verbatim
e0“This high biomass was essential in glyphosate treated plots in order to maintain excellent weed control throughout the growing season.”
t0“Pumpkin”
Claim · model-written summary
Zadoks 69 plus glyphosate yielded less than the weed-free control in 2013.
Verbatim
e0“When compared with the no-mulch weed-free control, yield in Zadoks 69+glyphosate treatment was lower in 2013 but comparable in 2014.”
t0“Pumpkin”
Claim · model-written summary
Zadoks 69 plus glyphosate yield was comparable to the weed-free control in 2014.
Verbatim
e0“When compared with the no-mulch weed-free control, yield in Zadoks 69+glyphosate treatment was lower in 2013 but comparable in 2014.”
t0“Pumpkin”
The same questions in other papers
glyphosate · yield · Cucurbita (pumpkins)Positive and negative results
1 in the opposite direction
- negative
glyphosate · growth · Cucurbita (pumpkins)Positive and negative results
1 in the opposite direction
- negative
glyphosate · Secale cereale · Cucurbita (pumpkins)Positive and negative results
1 in the opposite direction
- negative
stage · growth · Cucurbita (pumpkins)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.