[Roundup against Elymus repens at different stubble heights and spraying times after harvest in the autumn]

automne autumn chemical control crop residues date de traitement elymus repens escarda fecha de tratamiento field experimentation glifosato glyphosate herbicidas herbicide herbicides lutte chimique malezas perennes mauvaise herbe vivace perennial weeds residuos de cosechas suecia sweden treatment date weed control