Abstract
Abstract The influence of low application rates of chlorsulfuron on the growth and reproduction of four taxonomically diverse plant species (canola, smartweed, soybean, and sunflower) were examined. Exposures examined ranged from 1 × 10−3 to 8 × 10−3 of the recommended field rates for cereal crops and were approximately 1,000 times less than the highest exposure recommended by the U.S. Environmental Protection Agency. Each species received a single application at one of three different stages of reproductive development. Effects were determined by measuring the height and yield of mature plants. The comparative effects of four different herbicides (atrazine, chlorsulfuron, glyphosate, and 2,4-D) were determined in the same manner by exposing each test species to a single low dose at one of three critical stages of reproductive development. Chlorsulfuron reduced the yield of all plants tested, with the amount of reduction depending on the time and rate of application. Most noteworthy was its influence on canola and soybean, in which at critical stages in development, applications of 9.2 × 10−5 and 1.8 × 10−4 kg/ha, respectively, reduced seed yields (dry wt) to 8 and 1% of those of controls without causing a significant change in vegetative growth. These low application rates are within the range of reported herbicide drift levels and suggest that chlorsulfuron may cause severe reduction in the yields of some nontarget crops if they are subjected to exposure at critical stages of development. Application of other herbicides at comparable rates and stages of plant development had no influence on either canola or soybean.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Chlorsulfuron reduced yield of all four tested plants.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse1 - Treatment
- Chlorsulfurone0
- Outcome
- yielde0
- Direction
- reducede0
- Qualifier
- time and rate of applicatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Chlorsulfuron reduced the yield of all plants tested, with the amount of reduction depending on the time and rate of application”
e1“canola, smartweed, soybean, and sunflower”
Claim · model-written summary
Low-dose chlorsulfuron reduced canola seed yield to 8% of controls.
- Taxon
- canolaBrassica napus var. napuse1
- Treatment
- applications of 9.2 × 10−5e0
- Outcome
- seed yields (dry wt)e0
- Direction
- reducede0
- Value
- 8e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applications of 9.2 × 10−5 and 1.8 × 10−4 kg/ha, respectively, reduced seed yields (dry wt) to 8 and 1% of those of controls without causing a significant change in vegetative growth”
e1“canola and soybean”
Claim · model-written summary
Low-dose chlorsulfuron reduced soybean seed yield to 1% of controls.
- Taxon
- soybean
Glycine maxe1 - Treatment
- 1.8 × 10−4 kg/hae0
- Outcome
- seed yields (dry wt)e0
- Direction
- reducede0
- Value
- 1%e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applications of 9.2 × 10−5 and 1.8 × 10−4 kg/ha, respectively, reduced seed yields (dry wt) to 8 and 1% of those of controls without causing a significant change in vegetative growth”
e1“canola and soybean”
Claim · model-written summary
Chlorsulfuron did not significantly change vegetative growth of canola or soybean.
- Taxon
- canolaBrassica napus var. napuse1
- Treatment
- Chlorsulfurone2
- Outcome
- vegetative growthe0
- Direction
- without causing a significant changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without causing a significant change in vegetative growth”
e1“canola and soybean”
e2“Chlorsulfuron reduced the yield”
Claim · model-written summary
Other herbicides at comparable rates did not influence canola or soybean.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- other herbicidese0
- Outcome
- growth and yielde1
- Direction
- had no influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of other herbicides at comparable rates and stages of plant development had no influence on either canola or soybean”
e1“growth and yield of nontarget plants”
The same questions in other papers
chlorsulfuron · yield · Brassica napus (oilseed rape)Positive and negative results
1 in the opposite direction
- positive
herbicide · yield · Brassica napus (oilseed rape)Results differ
18 papers in the same direction as this paper · 32 in the opposite direction
- positive
- 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.