Activities of cellulase and amylase in soils as influenced by insecticide interactions.

Abstract:

:Interaction effects of the insecticides monocrotophos and quinalphos (organophosphates), and cypermethrin (pyrethroid), on microbial activities in two agricultural soils-black vertisol soil and red alfinsol soil were tested for 30 days under laboratory conditions. Individual application of the three insecticides at 5, 10 and 25microg g(-1) to the soil distinctly enhanced the activities of cellulase and amylase. Insecticide combinations involving monocrotophos or quinalphos with cypermethrin yielded synergistic, antagonistic and additive interaction effects on both enzymes in the soils. At lower levels, 5 and 10microg g(-1), the insecticides in combination interacted additively or synergistically toward both enzymes. But, both combinations at the highest level of 25microg g(-1) exhibited an antagonistic interaction, with a reduction in enzyme activities to a level lower than that of the control. Interaction effects of insecticides in combinations on two enzyme activities in both soils were related to populations of cellulolytic and amylolytic organisms in soils under the impact of combination of insecticides. These interaction responses were persistent even for 30 days.

journal_name

Ecotoxicol Environ Saf

authors

Gundi VA,Viswanath B,Chandra MS,Kumar VN,Reddy BR

doi

10.1016/j.ecoenv.2006.11.011

subject

Has Abstract

pub_date

2007-10-01 00:00:00

pages

278-85

issue

2

eissn

0147-6513

issn

1090-2414

pii

S0147-6513(06)00243-0

journal_volume

68

pub_type

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