Abstract
ABSTRACT Uneven maturation in canola is an important challenge for its management in regions subject to frost and high rainfall at the end of the cycle. In order to identify practices to maximize grain yield under these growing conditions, this work evaluated the effects of desiccation with herbicides at different phenological stages on Hyola 433, one of the most commonly used hybrids in Brazil. The experiment was conducted in a randomized block design with four repetitions in a 6 x 4 factorial scheme, with five herbicides: paraquat, diquat and ammonium glufosinate at dose of 400 g a.i. ha-1, glyphosate at 1,440 g a.i. ha-1 and saflufenacil at 70 g a.i. ha-1, plus the control, at four phenological stages of silique maturation (G2, G3, G4 and G5). Desiccation at G2 and G3 reduced the oil content and thousand-grain weight on average by 60%, affecting directly grain yield. Desiccation at G4, regardless of herbicide, did not influence thousand-grain weight and oil content, but the use of diquat reduced canola yield by 187 kg ha-1. In the desiccation at G5, none of the herbicides led to differences compared to the control for thousand-grain weight, yield and oil content, and it allowed harvest to be brought forward by five days. In general, the crop presents adequate responses to the desiccation with different herbicides at the phenological stages G4 and G5.
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Claims 8
Claim · model-written summary
Desiccation at G2 and G3 reduced canola oil content by 60% on average.
Not reportedTaxonComparator
Verbatim
e0“Desiccation at G2 and G3 reduced the oil content and thousand-grain weight on average by 60%”
Claim · model-written summary
Desiccation at G2 and G3 reduced thousand-grain weight by 60% on average.
Not reportedTaxonComparator
Verbatim
e0“Desiccation at G2 and G3 reduced the oil content and thousand-grain weight on average by 60%”
Claim · model-written summary
Desiccation at G2 and G3 affected grain yield.
- Outcome
- grain yielde0
Not reportedTaxonTreatmentComparatorDirection
Verbatim
e0“affecting directly grain yield”
Claim · model-written summary
At G4, desiccation did not influence thousand-grain weight or oil content.
- Treatment
- Desiccation at G4e0
- Outcome
- thousand-grain weight and oil contente0
- Direction
- did not influencee0
Not reportedTaxonComparator
Verbatim
e0“Desiccation at G4, regardless of herbicide, did not influence thousand-grain weight and oil content”
Claim · model-written summary
Diquat at G4 reduced canola yield by 187 kg ha-1.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse0 - Treatment
- diquate0
- Outcome
- canola yielde0
- Direction
- reducede0
- Value
- 187 kg ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“the use of diquat reduced canola yield by 187 kg ha-1”
Claim · model-written summary
At G5, herbicides produced no difference in thousand-grain weight, yield, or oil content versus control.
- Treatment
- herbicidese0
- Outcome
- thousand-grain weight, yield and oil contente0
- Direction
- none of the herbicides led to differencese0
- Comparator
- controle0
Not reportedTaxon
Verbatim
e0“none of the herbicides led to differences compared to the control for thousand-grain weight, yield and oil content”
Claim · model-written summary
Desiccation at G5 advanced harvest by five days.
Not reportedTaxonTreatmentComparator
Verbatim
e0“it allowed harvest to be brought forward by five days”
Claim · model-written summary
The authors judged G4 and G5 suitable stages for desiccation with different herbicides.
- Outcome
- desiccation with different herbicides at the phenological stages G4 and G5e0
Not reportedTaxon
Verbatim
e0“the crop presents adequate responses to the desiccation with different herbicides at the phenological stages G4 and G5”
The same questions in other papers
diquat · yield · Brassica napus (oilseed rape)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
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.