Abstract
Summary: Infestations of marsh ragwort, Senecio aquaticus Huds., in established ley grassland were sprayed at the rosette stage in April or May with MCPA, 2,4‐D, asulam or a 2,4‐D asulam mixture. All treatments gave better control in the year after spraying than in the year of spraying. The most effective herbicide was 2,4‐D ester at 1–68 or 1–12 kg/ha with or without the incorporation of asulam at 1–12 kg/ha. MCPA at 1–68 kg/ha was less effective, especially in the year of spraying and asulam alone at 1‐12 kg/ha gave consistently the poorest control of all treatments. Spraying in May gave better control in the year of spraying than April application, but in the year after spraying date of application made no difference to the degree of control. S. aquaticus at the various sites differed in general susceptibility to herbicides in the year of spraying, but in the year after spraying these differences disappeared.
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Claims 8
Claim · model-written summary
All herbicides controlled ragwort better the following year than the spray year.
Not reportedTaxon
Verbatim
e0“All treatments gave better control in the year after spraying than in the year of spraying.”
Claim · model-written summary
2,4-D ester, with or without asulam, was the most effective herbicide.
- Treatment
- 2,4‐D ester at 1–68 or 1–12 kg/hae0
- Outcome
- most effective herbicidee0
- Direction
- most effectivee0
Not reportedTaxonComparator
Verbatim
e0“The most effective herbicide was 2,4‐D ester at 1–68 or 1–12 kg/ha with or without the incorporation of asulam at 1–12 kg/ha.”
Claim · model-written summary
MCPA was less effective, especially in the spray year.
Not reportedTaxonComparator
Verbatim
e0“MCPA at 1–68 kg/ha was less effective, especially in the year of spraying”
Claim · model-written summary
Asulam alone consistently gave the poorest control.
Not reportedTaxon
Verbatim
e0“asulam alone at 1‐12 kg/ha gave consistently the poorest control of all treatments.”
Claim · model-written summary
May spraying controlled ragwort better than April spraying in the application year.
Not reportedTaxon
Verbatim
e0“Spraying in May gave better control in the year of spraying than April application”
Claim · model-written summary
Spray timing made no difference to control in the next year.
Not reportedTaxonComparator
Verbatim
e0“in the year after spraying date of application made no difference to the degree of control.”
Claim · model-written summary
Ragwort susceptibility to herbicides varied among sites during the spray year.
- Taxon
- S. aquaticus
Jacobaea aquaticae0 - Outcome
- general susceptibility to herbicidese0
- Direction
- differede0
- Setting
- various sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S. aquaticus at the various sites differed in general susceptibility to herbicides in the year of spraying”
Claim · model-written summary
Between-site susceptibility differences disappeared the next year.
- Outcome
- these differences disappearede0
Not reportedTaxon
Verbatim
e0“in the year after spraying these differences disappeared.”