[Weed control in winter cereals in spring]

air temperature apera spica-venti application rates cirsium cultivos de invierno culture d'hiver date de traitement dose d'application escarda fecha de tratamiento herbicidas herbicide herbicides malezas mauvaise herbe precipitation primavera printemps rendement rendimiento spring temperatura del aire treatment date triticum aestivum variedades varieties weed control weeds winter crops yields