Uptake and translocation of dimefox and schradan in hops

摘要

AbstractDuring the 1971 growing season an experiment was carried out to study the uptake, translocation and residue levels of dimefox and schradan in hope after applying a soil drench of Terra‐Sytarn (222 g/litre dimefox‐20 g/litre schradan) at various times in varying concentrations.Residue analysis shows that the dimefox concentration in the hop plants reaches a peak about one week after application, which increases with the amount applied. Then a gradual breakdown sets in so that at the time of harvesting the differences between the dosages have virtually disappeared. Translocation of dimefox in the hop plant is very rapid, but the breakdown is faster at the top of the plant. Schradan concentrations were usually very low and residues at harvest time negligi