Establishment techniques for dichondra ground covers in orchards

摘要

A field trial evaluated several different techniques for establishing strips of dichondra (Dichondra micrantha) under newly planted apple trees for weed control purposes. Each technique involved planting a line of dichondra either side of the tree row, with lateral spread of the plants eventually allowing the two strips of ground cover to merge. Plugs of dichondra allowed more rapid establishment than transplanted strips of material or sown seeds. However, all methods gave total ground cover after12 months. In a separate pot trial, several herbicide treatments suitable for controlling weeds during this establishment phase were assessed for their effects on young dichondra. Herbicides that were tolerated by the dichondra included haloxyfop, clopyralid, tribenuron, metsulfuron, oxadiazon, oryazalin, glyphosate and propyzamide. Several application rates and mixtures of some herbicides were assessed. Plugs of dichondra tolerated more herbicides than young seedlings. The best strategies for establishing dichondra ground covers in orchards are discussed.