STUDIES ON PERSISTENCE OF ACEPHATE, PROFENOFOS AND TRIAZOPHOS IN OKRA
Loading...
Date
2015
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Studies on persistence of acephate, profenofos and
triazophos in okra’’ was carried out in the Department of Entomology, Dr. Y S Parmar
University of Horticulture and Forestry, Nauni, Solan (HP) during the year 2014. The
objectives of the study were i) to evaluate the persistence of acephate, profenofos and
triazophos in okra fruits, ii) effect of processings on residues and the accumulation of
insecticides in the soil. The persistence study on okra fruits recorded initial deposits due to
single dose each of acephate, methamidophos, profenofos and triazophos as 1.858, 0.048,
1.418 and 1.838 mg kg
-1
, respectively. However, at double dose the deposits were 3.337,
0.068, 2.801 and 3.092 mg kg
-1
for respective insecticide. The initial deposits of 0.291, 0.483
and 0.500 mg kg
-1
at single dose and 0.443, 0.056, 1.003 and 1.203 mg kg
-1
at double dose
were observed for acephate, methamidophos, profenofos and triazophos, respectively, in okra
cropped soil. Acephate, profenofos and triazophos residues persisted in okra fruits upto 7 and
10 days at single and double dose, respectively. The residues of acephate, profenofos and
triazophos in fruits reduced to half in less than 2 days. The waiting periods for the studied
insecticides were worked out at their limit of determination(0.05 mgkg
-1
) due to lack of MRL
value in India. The safe waiting periods on okra were suggested as8.2, 7.6 and 7.4 days for
acephate, profenofos and triazophos, respectively. The washing of okra fruits by tap water,
saline water and lukewarm water were found effective in removing the residues upto 41.87,
50.00 and 58.13 per cent, respectively. Open pan and microwave cooking provided upto
56.20 and 63.50 per cent relief, respectively from insecticide contamination. Cooking
(microwave) was found as the most effective decontamination process.
Description
Keywords
null