Field evaluation of three pre-emergent herbicides for weed control in potted seedlings of ten species of ornamental trees in Singapore

agricultural chemicals asia asie control de malezas control de plagas cultivation cultivo cultivo protegido culture sous abri economic plants herbicidas herbicide herbicides lutte anti-mauvaise herbe methode methods ornamental plants pest control plantas plantas ornamentales plante plante ornementale plants pratique culturale produit agrochimique protected cultivation protection singapore singapour singapur weather control weed control