Translations:Benutzer:Arian/Klett-Mini-Test/945/en

Weeds and Weed Grasses among the Cereal Crops

The companion flora of winter crops divides into autumn and spring germinators. Among the weeds and weed grasses germinating in autumn, those that are winter-hardy prove troublesome: blackgrass (Alopecurus myosuroides) and loose silky-bent (Apera spica venti), along with weeds such as mayweed (Anthemis spec.), speedwell (Veronica spec.), and others. Because of its low ground cover in autumn and winter, wheat is more threatened than rye or barley. Through their pre-winter tillering, the latter two gain on the weed grasses and weeds in growth and soil coverage. Only rarely does the autumn soil condition allow one to intervene with weeder harrow or harrow at this stage. Even partial correction in early spring is of limited use. Hoeing with narrow goosefoot shares suits only wheat — which tillers only in spring — not rye and barley; these have already largely formed their shallow-running crown roots. Against spring germinators in the winter crop, the weeder harrow and the light harrow render good service.