As the injury progresses more of the leaves will exhibit necrosis. Metribuzin and atrazine are somewhat mobile in the soil and can move into the soil profile. If the chemical has moved into the soil, injury symptoms may not begin to appear until after several leaves have developed, when the sugar beet root will have grown down to the chemical. The authors Don W. Morishita is an Associate Professor of Weed Science and Extension Specialist at the University of Idaho Twin Falls Research and Extension Center. List of Figures 1.
Cotyledon leaves growth stage of normal sugar beet.
First true leaf growth stage of normal sugar beet. Third leaf growth stage of normal sugar beet. Normal sugar beet seedling approximately 7 weeks after planting. Betamix injury on cotyledon leaves- leaf tip and leaf margin necrosis. Blotchy chlorosis and necrosis from Betamix injury from application at high temperatures.