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Chemical control of marsh ragwort (Senecio aquaticus Huds.) in established grassland
Author(s) -
FORBES JAMES C.
Publication year - 1977
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1977.tb00475.x
Subject(s) - mcpa , senecio , grassland , biology , agronomy , horticulture , pesticide , botany
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.