Influence of insecticides flubendiamide and spinosad on biological activities in tropical black and red clay soils.
A laboratory experiment has been conducted to investigate the ecological toxicity of flubendiamide and spinosad at their recommended field rates and higher rates (1.0, 2.5, 5.0, 7.5, 10.0 kg ha-1) on cellulase, invertase and amylase in black and red clay soils after 10, 20, 30 and 40-day exposure under controlled conditions in groundnut (Arachis hypogaea L.) soils of Anantapur District, Andhra Pradesh, India. Flubendiamide and spinosad were stimulatory to the activities of cellulase, invertase and amylase at lower concentrations at 10-day interval. The striking stimulation in soil enzyme activities noticed at 2.5 kg ha-1, persists for 20 days in both soils. Overall, the higher concentrations (5.0-10.0 kg ha-1) of flubendiamide, and spinosad were toxic or innocuous to cellulase, invertase and amylase activities, respectively. The results of the present study thus, clearly, indicate that application of the insecticides in cultivation of groundnut, at field application rates improved the activities of cellulase, invertase and amylase in soils.
Department of Microbiology, Sri Krishnadevaraya University, Anantapur, 515 055, Andhra Pradesh, India. jaffermicro@gmail.com.|Department of Life Sciences and Agriculture, Universidad de las Fuezas Armada, Sangolqui, Quito, Ecuador, South America. jaffermicro@gmail.com.
G Jaffer
GJ
Mohiddin
Department of Microbiology, Sri Krishnadevaraya University, Anantapur, 515 055, Andhra Pradesh, India.|Radioactive Waste Management (Bioremediation) Lab, Division of Advanced Nuclear Engineering, Pohang University of Science and Technology, Pohang-si, Republic of Korea.
M
M
Srinivasulu
Plant Molecular Biology Unit, Department of Biotechnology and Genetic Engineering, Bharathidasan University, Tiruchirappalli, 620024, Tamil Nadu, India.
K
K
Subramanyam
Department of Biotechnology and Bioinformatics, Yogi Vemana University, Kadapa, 516 003, Andhra Pradesh, India.
M
M
Madakka
Department of Microbiology, Sri Krishnadevaraya University, Anantapur, 515 055, Andhra Pradesh, India.
D
D
Meghana
Department of Microbiology, Sri Krishnadevaraya University, Anantapur, 515 055, Andhra Pradesh, India.
V
V
Rangaswamy
Enzyme activities; Flubendiamide; Groundnut (Arachis hypogaea L.) soils; Spinosad