Weed control by growth-regulating substances

chemical control clima climat climate crecimiento croissance environmental factors escarda facteur du milieu factores ambientales formulaciones formulation formulations gramineas graminee grasses growth herbicidas herbicide herbicides hormonas hormone hormones lutte chimique malezas mauvaise herbe pesticide pesticides plaguicidas pulverizadores residues residuos sprayers variedades varieties weed control weeding weeds