Premium
Persistence of dichlobenil in a sandy soil and effects of residues on plant growth
Author(s) -
WILLIAMS JOHN H.,
EAGLE DAVID J.
Publication year - 1979
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.1365-3180.1979.tb01544.x
Subject(s) - persistence (discontinuity) , metabolite , plant growth , crop , horticulture , agronomy , chemistry , biology , biochemistry , geotechnical engineering , engineering
Summary: The persistence of dichlobenil following the application of dichlobenil granules was studied in a replicated plot experiment including both surface and incorporated treatments of 8·3 and 16·6 kg/ha ai. Soil analyses showed an initial half‐life of about 4 weeks but the persistence increased with time and a year after application the half‐life was about 1 year. Incorporation of the granules into the soil markedly increased the persistence of dichlobenil and its metabolite dichlorobenzamide. The most sensitive crop was carrot which was damaged by residues of only 1–2% of the recommended dose. Residues phytotoxic to carrots persisted for 2 years from the 8·3 kg/ha surface application and 5 years from the 18·6 kg/ha incorporated application. Lettuce was also highly sensitive to residues.