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Inhibition of seed germination and early stem elongation of Cuscuta australis by ethofumesate
Author(s) -
GIANNOPOLITIS C. N.
Publication year - 1979
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.1365-3180.1979.tb01581.x
Subject(s) - germination , metolachlor , horticulture , biology , botany , agronomy , pesticide , atrazine
Summary: Hmergence of dodder ( Cuseuta australis R. Br.) was unexpecledly prevented in plois of a sugarbeet field where ethofumesate had been applied at 1.6 Kg/ha. Appropriate laboratory tesls have shown that ethofumesate is a potent inhibitor of dodder seed germination (I D 50 = 10 μg/ml) and of early stem elongalion (ID 50 = 73μg/ ml). Wheat. a standard susceptible species to field applications of ethofumesate, is equally susceptible to inhibition of stem elongation (ID 50 =68 μg/ml), but it is far less susceptible to inhibition of germination (I D 50 =188 μg/ml). Compared to propyzamide. ethofiimesate is a stronger inhibitor of germination. Metolachlor and Hercules 22234 [eihyl N‐chloroacetyl‐N ‐(2,6‐diethylphenyl) aminoacetate] are also active in inhibiting dodder germination and stem elongation, but at higher concentrations than ethofumesate. Current methods of controlling dodder in sugarheets may be improved with inclusion of pre‐emergence use of ethofumesate.