Abstract
The conversion to no-tillage (NT) may seem risky to some producers who rely on tillage to control weeds, some insect pests and disease-causing pathogens that can reduce crop yield. Weeds, arthropods, and disease incidence were monitored in silage corn (Zea mays L.) and soybean (Glycine max L. Merr.) agroecosystems with CT and newly established NT plots in Ste-Anne-de-Bellevue, Québec. During the first 2 establishment years, there were more annual grass and fewer annual broadleaf weeds in NT than in CT plots, but the surface area covered by weeds (broadleaf,grasses and perennials) was greater in CT than NT plots. Foliar arthropods were more numerous in soybean than corn plots in both years, but were unaffected by tillage. There were more ground-dwelling generalist predators, especially Coleoptera and Carabidae, in CT than NT plots, while spiders and harvestmen (Araneae and Opiliones) were dominant in NT plots. Crop damage from insect pests and diseases was below economic thresholds, but 5 yr of yield monitoring (2000–2004) revealed a trend of greater silage corn and soybean yields in CT than NT plots. The reduction in crop yield after establishing NT practices at this site was probably due to rooting constraints from inadequate seedbed preparation in the NT system, rather than from weed competition, insect damage or crop diseases. Key words: Arthropods, crop disease, silage corn, soybean, tillage, weed control
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Claims 11
Claim · model-written summary
Annual grass weeds were more abundant under NT than CT.
Verbatim
e0“there were more annual grass and fewer annual broadleaf weeds in NT than in CT plots”
e1“silage corn (Zea mays L.)”
Claim · model-written summary
Annual broadleaf weeds were fewer under NT than CT.
- Taxon
- soybean
Glycine maxe1 - Treatment
- NTe0
- Interactor
- annual broadleaf weedse0weed
- Outcome
- annual broadleaf weedse0
- Direction
- fewere0
- Comparator
- CT plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were more annual grass and fewer annual broadleaf weeds in NT than in CT plots”
e1“soybean (Glycine max L. Merr.)”
Claim · model-written summary
Weed cover was greater under CT than NT.
Verbatim
e0“the surface area covered by weeds (broadleaf,grasses and perennials) was greater in CT than NT plots”
e1“silage corn (Zea mays L.)”
Claim · model-written summary
Foliar arthropods were more numerous in soybean than corn plots.
- Taxon
- soybeanGlycine maxe0
- Interactor
- Foliar arthropodse0other
- Outcome
- Foliar arthropodse0
- Direction
- more numerouse0
- Comparator
- corn plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar arthropods were more numerous in soybean than corn plots in both years”
Claim · model-written summary
Tillage did not affect foliar arthropod abundance.
- Taxon
- soybeanGlycine maxe0
- Treatment
- tillagee0
- Interactor
- Foliar arthropodse0other
- Outcome
- Foliar arthropodse0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar arthropods were more numerous in soybean than corn plots in both years, but were unaffected by tillage”
Claim · model-written summary
Ground-dwelling generalist predators were more numerous in CT than NT.
Verbatim
e0“There were more ground-dwelling generalist predators, especially Coleoptera and Carabidae, in CT than NT plots”
e1“silage corn (Zea mays L.)”
Claim · model-written summary
Spiders and harvestmen dominated NT plots.
- Taxon
- soybeanGlycine maxe1
- Outcome
- spiders and harvestmen (Araneae and Opiliones) were dominante0
- Setting
- NT plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spiders and harvestmen (Araneae and Opiliones) were dominant in NT plots”
e1“soybean (Glycine max L. Merr.)”
Claim · model-written summary
Insect pest damage was below economic thresholds.
Verbatim
e0“Crop damage from insect pests and diseases was below economic thresholds”
e1“silage corn (Zea mays L.)”
Claim · model-written summary
Disease damage was below economic thresholds.
- Taxon
- soybeanGlycine maxe1
- Outcome
- Crop damage from insect pests and diseasese0
- Direction
- belowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Crop damage from insect pests and diseases was below economic thresholds”
e1“soybean (Glycine max L. Merr.)”
Claim · model-written summary
Silage corn yield tended to be greater in CT than NT.
Verbatim
e0“a trend of greater silage corn and soybean yields in CT than NT plots”
Claim · model-written summary
Soybean yield tended to be greater in CT than NT.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a trend of greater silage corn and soybean yields in CT than NT plots”
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See all 390 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.