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The basis of field tolerance of field bean and pea to dimefuron *
Author(s) -
GLASGOW J. L.,
DICKS J. W.
Publication year - 1980
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1980.tb00036.x
Subject(s) - field pea , pisum , vicia faba , phaseolus , horticulture , biology , shoot , sativum , chemistry , agronomy , botany
Summary: Ficld bean ( Vicia fab a L. cv. Maris Bead) was susceptible both to simazine and dimefuron applied to the root system in culture solution at concentrations of 0–5 and above. Pea ( Pisum satirum L. cv. Kelvedon Wonder). however, exhibited significantly greater tolerance them field bean to dimefuron between concentrations of 0.5 and 1.0. The Hill activity of isolated chloroplasts from pea was more sensitive to dimefuron than that from field bean qualitative (autoradiography) and quantitative experiments dcmonstrated that root‐applied 14 C dimefuron was more readily transported to the shoot system in bean than in pea. A double‐pot experiment revealed that the effective site of uptake by the field bean is the root system: foliar uptake of 14 C‐dimefuron was shown, but little movement of label from the treated leaf oceurred. Adsorption of dimefuron on a calcareous loam soil was relatively low. It is concluded that fieltolerance exhibited by field bean to pre‐emergence applications of dimefuron is due principally to depth protection: in pea. retention in the root provides an additional basis iS for tolerance.