Abstract
The oilseed rape conventional system can be moved to a more sustainable one by reducing herbicide application whilst ensuring at the same time effective weed control, maintaining oilseed rape yield, and quality and increasing profitability. Over three growing season periods, two field experiments at two different Southern Italy locations were carried out. In both sites, a conventional weed-control management system (recommended label dose), four alternative low-herbicide treatments, and an untreated control were compared. We monitored weeds and crop response to herbicide treatments, and calculated the net economic return, within site and year, for each treatment. In experiment 1, a half dose of herbicide did not show any significant difference in seed yield with respect to conventional treatment in two of three growing seasons. In experiment 2, compared with the conventional system, weedy control and the lowest applied herbicide dose treatment (25% of the recommended label dose) did not underline significant differences with regard to yield level. Net returns from the half dose of metazachlor herbicide were not significantly lower than net returns from conventional treatment in experiment 1 (on a three-year average 748 vs. 812 € ha−1, respectively). Our findings suggest that the herbicide dose might be cut by at least 50% in order not to jeopardize negative effects on production and economic performances.
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Claims 5
Claim · model-written summary
Half-dose herbicide seed yield did not differ significantly from conventional treatment in two of three seasons.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse1 - Treatment
- a half dose of herbicidee0
- Outcome
- seed yielde0
- Direction
- did not show any significant differencee0
- Qualifier
- in two of three growing seasonse0
- Comparator
- conventional treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“a half dose of herbicide did not show any significant difference in seed yield with respect to conventional treatment in two of three growing seasons”
e1“oilseed rape conventional system”
Claim · model-written summary
Weedy control yield did not differ significantly from the conventional system.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- weedy controle0
- Outcome
- yield levele0
- Direction
- did not underline significant differencese0
- Comparator
- conventional systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with the conventional system, weedy control and the lowest applied herbicide dose treatment (25% of the recommended label dose) did not underline significant differences with regard to yield level”
e1“oilseed rape conventional system”
Claim · model-written summary
A 25% recommended herbicide dose did not yield significantly differently from the conventional system.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- lowest applied herbicide dose treatment (25% of the recommended label dose)e0
- Outcome
- yield levele0
- Direction
- did not underline significant differencese0
- Comparator
- conventional systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with the conventional system, weedy control and the lowest applied herbicide dose treatment (25% of the recommended label dose) did not underline significant differences with regard to yield level”
e1“oilseed rape conventional system”
Claim · model-written summary
Half-dose metazachlor net return was not significantly lower than conventional treatment, averaging 748 versus 812 € ha−1.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- half dose of metazachlor herbicidee0
- Outcome
- Net returnse0
- Direction
- not significantly lowere0
- Value
- 748 vs. 812 € ha−1e0
- Comparator
- conventional treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Net returns from the half dose of metazachlor herbicide were not significantly lower than net returns from conventional treatment in experiment 1 (on a three-year average 748 vs. 812 € ha−1, respectively).”
e1“oilseed rape conventional system”
Claim · model-written summary
The authors suggest reducing herbicide dose by at least 50% without jeopardizing production or economic performance.
- Taxon
- oilseed rapeBrassica napuse1
- Outcome
- herbicide dose might be cut by at least 50%e0
- Value
- at least 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the herbicide dose might be cut by at least 50% in order not to jeopardize negative effects on production and economic performances”
e1“oilseed rape conventional system”
The same questions in other papers
metazachlor · yield · Brassica napus (oilseed rape)Positive and negative results
1 reporting no difference from an alternative
- positive
herbicide · yield · Brassica napus (oilseed rape)Results differ
18 papers in the same direction as this paper · 32 reporting no difference from an alternative
- no effect
- positive
- positive
47 papers more in this group
See all 51 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.