Premium
Breakdown of the insecticide ‘Gardona’ on plants and in soils
Author(s) -
Bey K. I.,
Wright A. N.
Publication year - 1969
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740200415
Subject(s) - loam , chemistry , soil water , hydrolysis , pesticide , cholinesterase , toxicology , horticulture , environmental chemistry , food science , agronomy , organic chemistry , biology , ecology , pharmacology
The breakdown of the insecticide ‘Gardona’ (2‐chloro‐1‐(2′, 4′, 5′,‐trichlorophenyl)‐vinyl dimethyl phosphate, previously known as SD 8447) has teen studied, on cabbages, apple foliage and fruit, and rice, and in soils, using radio‐isotope techniques under laboratory conditions. There was some isomerisation of ‘Gardona’ to its α‐isomer on foliage. the initial half‐life of ‘Gardona’ was about 1 day on the leaves and 4–5 days in medium loam soil. on foliage and in soils breakdown occurred by hydrolysis of the P‐O‐C bond to give initially 2,4,5‐trichlorophenacyl chloride and demethyl ‘Gardona’ followed by reactions of the former involving reduction of the ketone group and reductive dechlorination to form a number of eight‐carbon compounds. On foliage and on apple fruit the major breakdown products are conjugates of 1‐(2′,4′,5′‐trichlorophenyl)ethan‐1‐ol with sugars other than β‐ D ‐glucose. The breakdown products are of low toxicity to rats and, apart from the o‐isomer, none has insecticidal activity and none inhibits cholinesterase.