Premium
Control of problem weeds of maize on the Transvaal Highveld (South Africa). III. Crotalaria sphaerocarpa Perr. ex. DC.
Author(s) -
ALAN C. M,
VISSER J. H.,
GROBBELAAR N.
Publication year - 1982
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.1365-3180.1982.tb00151.x
Subject(s) - paraquat , atrazine , weed , crotalaria juncea , agronomy , allelopathy , biology , weed control , pesticide , horticulture , botany , germination , green manure , biochemistry
Summary Sixteen different herbicides and herbicide mixtures were evaluated for their efficiency in controlling Crotalaria sphaerocarpa Perr. ex. DC. using percentage mortality and relative plant dry mass as criteria of herbicide efficiency. Paraquat and a mixture of atrazine and Tronic were the only treatments which effectively controlled the weed at all ten leaf stages tested. Atrazine alone and ametryne alone were 100% effective only for the first four leaf stages. Other treatments were relatively ineffective. The wax coat on the leaves of C. sphaerocarpa possibly impedes the absorption of lethal quantities of some herbicides, resulting in an apparent resistance. This phenomenon, probably accounts for the fact that this plant is considered to be a problem weed.