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TOLERANCE OF CRANBERRY ( VACCINIUM MACROCARPON AIT) TO SAN‐9789: AN EXPERIMENTAL HERBICIDE
Author(s) -
DEVLIN ROBERT M.,
DEUBERT KARL H.
Publication year - 1973
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.1365-3180.1973.tb01292.x
Subject(s) - vaccinium , chlorosis , horticulture , phytotoxicity , ericaceae , berry , biology , botany
Summary. The experimental herbicide 4‐chloro‐5‐(methylamino)‐2‐(α,α,α‐trifluoro‐m‐tolyl)‐3(2H)‐pyridazmone (SAN‐9789) was applied to cranberry vines ( Vaccinium macrocarpon Ait. cv. Early Black) in April at rates of 0, 9, 13·5, 18, and 27 kg a.i./ha. No phytotoxicity on vine growth or appearance was detected in plots receiving 9 kg/ha but at 13·5 kg/ha a temporary chlorosis at the base of the cranberry leaf blade was observed. More extensive and permanent chlorosis was caused by the larger application rates of 18 and 27 kg/ha. No significant differences were detected between control and treated berries with respect to colour, percentage dry weight, and size. However, application rates of 27 kg/ha significantly reduced pectin content of fresh cranberries. Berries from vines treated in April with SAN‐9789 did not contain detectable amounts of the herbicide at harvest time in September. Résistance de la canneberge à gros fruits (Vaccinium macrocarpon Ait) à im herbicide expéri‐mental, le SAN‐9789