Abstract
Due to a higher proportion of oilseed rape (Brassica napus) in sugar beet rotations, volunteer oilseed rape can occur in increased numbers in subsequent crops. The sulfonylurea triflusulfuron is widely used for broad-leaved weed control in sugar beet, but may no longer be effective to control imidazolinone-tolerant volunteers when imidazolinone-tolerant oilseed rape is grown, which is due to a cross-tolerance to ALS-inhibiting herbicides. Aim of the study was to evaluate six different herbicide strategies for the control of tolerant volunteer oilseed rape. As a result, imidazolinone-tolerant oilseed rape showed a distinctive cross-resistance to triflusulfuron in the field. Mean herbicide efficacy was 14 % and was only slightly increased by combination with metamitron. Imidazolinone-susceptible and -tolerant oilseed rape varieties showed different response to the herbicide treatments. A significantly higher reduction of plant fresh mass (shoot) > 90 % was caused by herbicide treatments that included the active ingredients desmedipham, phenmedipham, ethofumesate, chloridazon and quinmerac. The results showed that triflusulfuron is no longer suitable to control volunteers if they are derived from imidazolinone-tolerance expressing varieties. However, alternative herbicides are available. Generally, increased attention has to be paid to volunteer management within the whole crop rotation if imidazolinonetolerant oilseed rape is grown. Appropriate tillage strategies after oilseed rape harvest have to be followed by effective herbicide treatments in the subsequent sugar beet, for example a mixture of metamitron, phenmedipham, desmedipham, ethofumesat and lenaciel.
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Claims 7
Claim · model-written summary
Imidazolinone-tolerant volunteer oilseed rape was cross-resistant to triflusulfuron in the field.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Interactor
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0weed - Outcome
- oilseed rape showed a distinctive cross-resistance to triflusulfurone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“imidazolinone-tolerant oilseed rape showed a distinctive cross-resistance to triflusulfuron in the field”
t0“sugar beet”
Claim · model-written summary
Mean herbicide efficacy was 14%.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- herbicide efficacye0
- Value
- 14 %e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mean herbicide efficacy was 14 %”
t0“sugar beet”
Claim · model-written summary
Combining triflusulfuron with metamitron only slightly increased efficacy.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- combination with metamitrone0
- Outcome
- slightly increasede0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was only slightly increased by combination with metamitron”
t0“sugar beet”
Claim · model-written summary
Susceptible and tolerant varieties responded differently to herbicide treatments.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Interactor
- oilseed rapeBrassica napuse0weed
- Outcome
- different response to the herbicide treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Imidazolinone-susceptible and -tolerant oilseed rape varieties showed different response to the herbicide treatments”
t0“sugar beet”
Claim · model-written summary
Treatments including five listed active ingredients reduced shoot fresh mass by over 90%.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- herbicide treatments that included the active ingredients desmedipham, phenmedipham, ethofumesate, chloridazon and quinmerace0
- Outcome
- plant fresh mass (shoot)e0
- Direction
- reductione0
- Value
- > 90 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significantly higher reduction of plant fresh mass (shoot) > 90 % was caused by herbicide treatments that included the active ingredients desmedipham, phenmedipham, ethofumesate, chloridazon and quinmerac”
t0“sugar beet”
Claim · model-written summary
Triflusulfuron is unsuitable for control of volunteers from imidazolinone-tolerant varieties.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- triflusulfuron is no longer suitable to control volunteerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“triflusulfuron is no longer suitable to control volunteers if they are derived from imidazolinone-tolerance expressing varieties”
t0“sugar beet”
Claim · model-written summary
Volunteer management should include tillage and effective herbicide treatment in subsequent sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Outcome
- Appropriate tillage strategies after oilseed rape harvest have to be followed by effective herbicide treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Appropriate tillage strategies after oilseed rape harvest have to be followed by effective herbicide treatments in the subsequent sugar beet”
The same questions in other papers
chloridazon · growth · Beta vulgaris (beet)Positive and negative results
1 in the opposite direction
- negative
desmedipham · growth · Beta vulgaris (beet)Positive and negative results
2 in the opposite direction
- negative
- negative
ethofumesate · growth · Beta vulgaris (beet)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
phenmedipham · growth · Beta vulgaris (beet)Positive and negative results
4 in the opposite direction
- negative
- negative
- negative
1 paper more in this group
See all 5 papers →herbicide · growth · Beta vulgaris (beet)Positive and negative results
11 papers in the same direction as this paper · 9 in the opposite direction
- negative
- negative
- negative
17 papers more in this group
See all 21 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.