This work presents a bibliographical review of a preventive technique to avoid weed emergence. This
technique has produced contradictory results in different research work and is thus a controversial
method. The photocontrol consists in sowing and doing other labour at night or covering the tools
with a light-proof cover, avoiding that weed seeds receive the necessary light stimulus for germination.
Firstly some theoretical aspects are described about the physiology of light dependence of weed
seed germination, which is not a constant need, and the interactions between different environmental
stimuli concerning light dependence. The second part is a review on the field work conducted
mainly in Northern Europe and describes the weed species, whose emergence was reduced. Finally,
some conclusions concerning the possible viability of this preventive technique are expressed. The
main problem seems to be the irregular efficacy, which is difficult to control as it is related to the different
light sensitivity between weed species influenced by soil moisture, temperature regime and
aspects of the own seed physiology.
Esta web usa cookies para ofrecer sus servicios. Al seguir navegando en la web acepta el uso que se hace de las cookies. Pulse aceptar para dejar de ver el mensaje. Más información sobre Cookies