It is absorbed by the emerging shoots or roots of most plants when soil-applied. Foliar absorption is greatly reduced after plants have a mature cuticle. Nortron is translocated to the foliage following uptake by roots and emerging shoot, but is not translocated out of treated leaves. Nortron can be applied postemergence, but only in combination with Betamix. Pyramin - Pyramin can be used preplant incorporated, preemergence, and postemergence.
Absorption is primarily through the roots with very little through the foliage.
Pyramin inhibits photosynthesis. Injury symptoms from the cotyledon stage through the appearance of true leaves are very similar. As the sugar beets get older the chlorotic injury symptoms on the leaf may become slightly mottled or discontinuous. Overapplication preplant or preemergence may delay or prevent crop emergence. Postemergence application injury symptoms include leaf chlorosis and necrosis as well as leaf thickening.