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OBSERVATIONS ON THE EFFECT OF HERBICIDES ON YOUNG COCONUTS
Author(s) -
ROMNEY D. H.
Publication year - 1964
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.1365-3180.1964.tb00264.x
Subject(s) - chlorosis , frond , diquat , paraquat , horticulture , weed , chemistry , biology , botany , biochemistry
Summary. Phytotoxic effects of eight herbicides on young coconuts were assessed by recording visual symptoms of injury and growth following treatment. The growth‐regulators 2,4‐D, 2,4,5‐T and MCPB were lethal at the normal doses used for annual weed control. Dalapon at 5–9 lb/ac applied in 100 gal/ac of water caused yellowing and necrosis of the foliage, reduced growth, and sometimes killed the whole plant, while doses down to 2.2 lb/ac caused some fusion of the pinnae. Monuron at 3.2 and 6.4 lb/ac resulted in serious frond damage and reduced growth, and some frond injury occurred at 1–6 lb/ac. Diquat at 0.25–1.0 lb/ac and paraquat at 1.0–l.5 lb/ac caused extensive necrosis of existing fronds but there was no appreciable reduction in new growth. Amitrole produced considerable chlorosis both at 3.1 and G.3 lb/ac, but only the higher dose caused a reduction in growth. Essai d'herbicides sur jeunes cocotiers