Fig. 6From: Comparison of visible imaging, thermography and spectrometry methods to evaluate the effect of Heterodera schachtii inoculation on sugar beetsEvolution of the canopy area of infested susceptible and tolerant cultivars. Canopy area is expressed as a percentage of the non-infested treatment. Time periods where the difference in canopy area between infested and non-infested treatments are significant are represented on the figure (p < 0.05)Back to article page