Abstract
Concern over the development of herbicide-resistant weeds has led to interest in integrated weed management systems that reduce selection pressure by utilizing mechanical and cultural weed control practices in addition to herbicides. Increasing crop seeding rate increases crop competitive ability and thus can enhance herbicide efficacy. However, it is unknown how increasing the seeding rate affects an herbicide’s efficacy. The objective of this study was to examine the interaction between increasing seeding rate and herbicide dose to control weeds. To meet this objective, the herbicide fluthiacet-methyl was applied to field-grown lentil, with Indian mustard, a proxy for wild mustard, used as a model weed. The experiment was a factorial design with four lentil seeding rates and seven herbicide rates. Overall the herbicide dose response was altered by changing lentil seeding rate. Increasing lentil seeding rate decreased the weed biomass production when herbicides were not applied. In two of the four site-years, increasing lentil seeding rate lowered the herbicide ED 50 , the dose required to result in a 50% reduction in weed biomass. Increasing the crop seeding rate altered the dose response to provide greater weed control at lower herbicide rates compared with normal crop seeding rates. Increased seeding rates also resulted in higher and more stable crop seed yields across a wider range of herbicide dosages. These results suggest that dose–response models can be used to evaluate the efficacy of other weed management practices that can interact with herbicide performance.
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Claims 6
Claim · model-written summary
Changing lentil seeding rate altered the herbicide dose response.
- Taxon
- lentil
Lens culinarise0 - Treatment
- changing lentil seeding ratee0
- Outcome
- herbicide dose responsee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overall the herbicide dose response was altered by changing lentil seeding rate”
Claim · model-written summary
Higher lentil seeding rate decreased weed biomass without herbicide.
- Taxon
- lentilLens culinarise0
- Treatment
- Increasing lentil seeding ratee0
- Interactor
- weede0weed
- Outcome
- weed biomass productione0
- Direction
- decreasede0
- Qualifier
- when herbicides were not appliede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing lentil seeding rate decreased the weed biomass production when herbicides were not applied”
Claim · model-written summary
Higher lentil seeding rate lowered the herbicide ED 50 in two of four site-years.
- Taxon
- lentilLens culinarise0
- Treatment
- increasing lentil seeding ratee0
- Interactor
- weede0weed
- Outcome
- herbicide ED 50e0
- Direction
- lowerede0
- Value
- 50%e0
- Qualifier
- two of the four site-yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In two of the four site-years, increasing lentil seeding rate lowered the herbicide ED 50 , the dose required to result in a 50% reduction in weed biomass”
Claim · model-written summary
Higher crop seeding rate improved weed control at lower herbicide rates versus normal seeding rate.
- Taxon
- lentilLens culinarist0
- Treatment
- Increasing the crop seeding ratee0
- Interactor
- weede0weed
- Outcome
- weed controle0
- Direction
- greatere0
- Qualifier
- lower herbicide ratese0
- Comparator
- normal crop seeding ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the crop seeding rate altered the dose response to provide greater weed control at lower herbicide rates compared with normal crop seeding rates”
t0“field-grown lentil”
Claim · model-written summary
Increased seeding rates yielded higher and more stable lentil seed yields over a wider herbicide-dose range.
- Taxon
- lentilLens culinarist0
- Treatment
- Increased seeding ratese0
- Outcome
- crop seed yieldse0
- Direction
- highere0
- Qualifier
- across a wider range of herbicide dosagese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased seeding rates also resulted in higher and more stable crop seed yields across a wider range of herbicide dosages”
t0“field-grown lentil”
Claim · model-written summary
The authors suggest using dose-response models to evaluate other weed management practices.
- Taxon
- lentilLens culinarist0
- Outcome
- dose–response models can be used to evaluate the efficacy of other weed management practicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results suggest that dose–response models can be used to evaluate the efficacy of other weed management practices that can interact with herbicide performance”
t0“field-grown lentil”
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See all 6 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.